JP2020080441A - Transmission method, transmission device, reception method, reception device - Google Patents

Abstract

To improve the reception quality of data in a radio communication using a single carrier system and/or a multi-carrier system.SOLUTION: The transmission method includes a mapping step, a signal processing step, and a transmission step. In the mapping step, a first modulation signal 105_1 and a second modulation signal 105_2 are generated from a piece of transmitted data 101. The first modulation signal is a signal which is generated by using the QPSK modulation system, and the second modulation signal is a signal generated by using the 16QAM modulation. In the signal processing step, a signal 106_A after the first signal processing and a signal 106_B after the second signal processing, each which satisfies a predetermined formula, are generated from the first modulation signal and the second modulation signal. In the transmission step, a signal after the first signal processing and a signal after the second signal processing are transmitted by using multiple antennas. A signal after the first signal processing and a signal after the second signal processing, which have the same symbol number, are transmitted at the same time using the same frequency.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmission method, a transmission device, a reception method, and a reception device.

  As a wireless communication system, a multi-carrier system such as a single carrier system and an OFDM (Orthogonal Frequency Division Multiplexing) system (for example, refer to Non-Patent Document 1) is under study. The multi-carrier method has an advantage of high frequency utilization efficiency and suitable for large capacity transmission. The single carrier method has an advantage that it does not require signal processing such as FFT (Fast Fourier Transform)/IFFT (Inverse FFT) and is suitable for implementation with low power consumption.

J. A. C. Bingham, "Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come", IEEE Communications Magazine, May 1990.

  In wireless communication using a single-carrier method and/or a multi-carrier method, a technique for improving data reception quality is desired.

  A transmission method according to an aspect of the present disclosure includes a mapping step, a signal processing step, and a transmission step. In the mapping step, a plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) are generated from the transmission data. However, i is a symbol number that is an integer of 0 or more, the plurality of first modulated signals s1(i) are signals generated using the QPSK modulation method, and the plurality of second modulated signals s2(i ) Is a signal generated using 16QAM modulation. In the signal processing step, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal processed signals z1(i) and A plurality of second signal-processed signals z2(i) are generated. In the transmitting step, the plurality of signals z1(i) after the first signal processing and the plurality of signals z2(i) after the second signal processing are transmitted using the plurality of antennas. The signal after the first signal processing and the signal after the second signal processing having the same symbol number are simultaneously transmitted at the same frequency.

  A transmission device according to an aspect of the present disclosure includes a mapping unit, a signal processing unit, and a transmission line. The mapping unit generates a plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) from the transmission data. However, i is a symbol number that is an integer of 0 or more, the plurality of first modulated signals s1(i) are signals generated using the QPSK modulation method, and the plurality of second modulated signals s2(i ) Is a signal generated using 16QAM modulation. The signal processing unit uses the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i) to obtain a plurality of first signal-processed signals z1(i) and A plurality of second signal-processed signals z2(i) are generated. The transmitting unit transmits the plurality of signals z1(i) after the first signal processing and the plurality of signals z2(i) after the second signal processing using the plurality of antennas. The signal after the first signal processing and the signal after the second signal processing having the same symbol number are simultaneously transmitted at the same frequency.

  A reception method according to an aspect of the present disclosure includes a reception step and a demodulation step. In the reception step, a reception signal obtained by receiving the first transmission signal and the second transmission signal transmitted from different antennas is acquired. As the first transmission signal and the second transmission signal, a plurality of signals z1(i) after the first signal processing and a plurality of signals z2(i) after the second signal processing are transmitted using a plurality of antennas. It is a signal. However, i is a symbol number which is an integer of 0 or more, and the signal after the first signal processing and the signal after the second signal processing having the same symbol number are simultaneously transmitted at the same frequency. The plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) are a plurality of first modulated signals s1(i) generated using the QPSK modulation method. ) And a plurality of second modulated signals s2(i) generated by using 16QAM modulation, the signal generated by performing the first signal processing. The plurality of first signal processed signals z1(i) and the plurality of second signal processed signals z2(i) are a plurality of first modulated signals s1(i) and a plurality of second modulated signals. A predetermined expression is satisfied for s2(i). In the demodulation step, the received signal is subjected to second signal processing corresponding to the first signal processing and demodulated.

  A reception device according to an aspect of the present disclosure includes a reception unit and a demodulation unit. The reception unit acquires a reception signal obtained by receiving the first transmission signal and the second transmission signal transmitted from different antennas. As the first transmission signal and the second transmission signal, a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) are used by using a plurality of antennas. It is the transmitted signal. However, i is a symbol number which is an integer of 0 or more, and the signal after the first signal processing and the signal after the second signal processing having the same symbol number are simultaneously transmitted at the same frequency. The plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) are a plurality of first modulated signals s1(i) generated using the QPSK modulation method. ) And a plurality of second modulated signals s2(i) generated by using 16QAM modulation, the first signal processing is performed on the generated signals. The plurality of first signal processed signals z1(i) and the plurality of second signal processed signals z2(i) are a plurality of first modulated signals s1(i) and a plurality of second modulated signals. A predetermined expression is satisfied for s2(i). The demodulation unit demodulates the received signal by performing second signal processing corresponding to the first signal processing.

  According to the present disclosure, there is a possibility that the reception quality of data can be improved in wireless communication using the single carrier method and/or the multicarrier method.

The figure which shows an example of a structure of a transmitter. The figure which shows an example of a structure of the signal processing part of a transmitter. The figure which shows an example of a structure of the signal processing part of a transmitter. The figure which shows the capacity in each SNR in an AWGN environment. The figure which shows an example of a structure of the radio|wireless part of a transmitter. The figure which shows an example of the frame structure of a transmission signal. The figure which shows an example of the frame structure of a transmission signal. The figure which shows an example of a structure of the part regarding the production|generation of control information. The figure which shows an example of a structure of the antenna part of a transmitter. The figure which shows an example of the frame structure of a transmission signal. The figure which shows an example of the frame structure of a transmission signal. The figure which shows an example of the arrangement|positioning method of the symbol with respect to a time-axis. The figure which shows an example of the symbol arrangement|positioning method with respect to a frequency axis. The figure which shows an example of the arrangement|positioning method of the symbol with respect to a time-frequency axis. The figure which shows an example of the arrangement|positioning method of the symbol with respect to a time-axis. The figure which shows an example of the symbol arrangement|positioning method with respect to a frequency axis. The figure which shows an example of the arrangement|positioning method of the symbol with respect to a time-frequency axis. The figure which shows an example of a structure of the radio|wireless part of a transmitter. The figure which shows an example of a structure of a receiver. The figure which shows an example of the relationship between a transmitter and a receiver. The figure which shows an example of a structure of the antenna part of a receiver. The figure which shows an example of a structure of a transmitter. The figure which shows an example of a structure of the signal processing part of a transmitter.

(Embodiment 1)
The transmitting method, transmitting apparatus, receiving method, and receiving apparatus of this embodiment will be described in detail.
FIG. 1 shows an example of the configuration of a transmission device such as a base station, an access point, or a broadcasting station in the present embodiment. The error correction coding 102 receives the data 101 and the control signal 100 as input, and is based on information about the error correction code included in the control signal 100 (for example, information of the error correction code, code length (block length), and coding rate). , Error correction encoding is performed, and encoded data 103 is output. The error correction coding unit 102 may include an interleaver. When the error correction coding unit 102 includes an interleaver, the data may be rearranged after encoding and the encoded data 103 may be output.

  The mapping unit 104 receives the encoded data 103 and the control signal 100 as input, performs mapping corresponding to the modulation scheme based on the information of the modulation signal included in the control signal 100, and maps the signal (baseband signal) 105_1, And the signal (baseband signal) 105_2 after mapping is output. It should be noted that mapping section 104 generates signal 105_1 after mapping using the first sequence and generates signal 105_2 after mapping using the second sequence. At this time, the first series and the second series are different.

  The signal processing unit 106 receives the signals 105_1 and 105_2 after mapping, the signal group 110, and the control signal 100 as input, performs signal processing based on the control signal 100, and outputs signals 106_A and 106_B after signal processing. At this time, the signal 106_A after signal processing is represented as u1(i) and the signal 106_B after signal processing is represented as u2(i) (i is a symbol number, for example, i is an integer of 0 or more). The signal processing will be described later with reference to FIG.

Radio section 107_A receives signal 106_A after signal processing and control signal 100 as input, performs processing on signal 106_A after signal processing based on control signal 100, and outputs transmission signal 108_A. Then, the transmission signal 108_A is output as a radio wave from the antenna unit #A (109_A).
Similarly, radio section 107_B receives signal 106_B after signal processing and control signal 100 as input, performs processing on signal 106_B after signal processing based on control signal 100, and outputs transmission signal 108_B. Then, the transmission signal 108_B is output as a radio wave from the antenna unit #B (109_B).

The control signal 100 is input to the antenna unit #A (109_A). At this time, based on the control signal 100, the transmission signal 108_A is processed and output as a radio wave. However, the antenna section #A (109_A) does not have to input the control signal 100.
Similarly, the antenna section #B (109_B) receives the control signal 100 as an input. At this time, based on the control signal 100, the transmission signal 108_B is processed and a radio wave is output. However, the antenna section #B (109_B) does not have to input the control signal 100.

The control signal 100 may be generated based on the information transmitted by the device as the communication partner of FIG. 1, or the device of FIG. 1 has an input unit and is input from the input unit. It may be generated based on the information.
FIG. 2 shows an example of the configuration of the signal processing unit 106 in FIG. The weighting synthesis unit (precoding unit) 203 has a signal 201A after mapping (corresponding to the signal 105_1 after mapping in FIG. 1) and a signal 201B after mapping (corresponding to the signal 105_2 after mapping in FIG. 1), Also, the control signal 200 (corresponding to the control signal 100 in FIG. 1) is input, weighted synthesis (precoding) is performed based on the control signal 200, and the weighted signal 204A and the weighted signal 204B are output. At this time, the signal 201A after mapping is represented as s1(t), the signal 201B after mapping is represented as s2(t), the signal 204A after weighting is represented as z1(t), and the signal 204B after weighting is represented as z2′(t). Note that t is time as an example. (S1(t), s2(t), z1(t), and z2'(t) are defined as complex numbers (thus, they may be real numbers)).
The weighting synthesis unit (precoding unit) 203 will perform the following calculation.

式（１）において、ａ、ｂ、ｃ、ｄは複素数で定義でき、したがって、ａ、ｂ、ｃ、ｄは複素数で定義するものとする。（実数であってもよい）なお、ｉはシンボル番号とする。

In the formula (1), a, b, c, d can be defined by complex numbers, and therefore a, b, c, d are defined by complex numbers. (It may be a real number) Note that i is a symbol number.

Then, the phase changing unit 205B inputs the signal 204B after the weighted combination and the control signal 200, and based on the control signal 200, changes the phase of the signal 204B after the weighted combination, and outputs the signal 206B after the phase change. Is output. Note that the signal 206B after the phase change is represented by z2(t), and z2(t) is defined by a complex number. (May be a real number)
A specific operation of the phase changing unit 205B will be described. In the phase changing unit 205B, for example, the phase of y(i) is changed with respect to z2′(i). Therefore, it can be expressed as z2(i)=y(i)×z2′(i). (I is the symbol number (i is an integer of 0 or more))
For example, the phase change value is set as follows. (N is an integer of 2 or more, and N is the cycle of phase change.) (If N is set to an odd number of 3 or more, the reception quality of data may be improved.)

（ｊは虚数単位）ただし、式（２）は、あくまでも例であり、これに限ったものではない。そこで、位相変更値ｙ（ｉ）＝ｅ^j×δ⁽ⁱ⁾であらわすものとする。
このときｚ１（ｉ）およびｚ２（ｉ）は次式であらわすことができる。

(J is an imaginary unit) However, the expression (2) is merely an example, and the present invention is not limited to this. Therefore, the phase change value y(i)=e ^j ×δ ⁽ⁱ⁾ is represented.
At this time, z1(i) and z2(i) can be expressed by the following equations.

なお、δ（ｉ）は実数である。そして、ｚ１（ｉ）とｚ２（ｉ）は、同一時間、同一周波数（同一周波数帯）で、送信装置から送信されることになる。
式（３）において、位相変更の値は、式（２）に限ったものではなく、例えば、周期的、規則的に位相を変更するような方法が考えられる。

Note that δ(i) is a real number. Then, z1(i) and z2(i) are transmitted from the transmission device at the same time and the same frequency (same frequency band).
In Expression (3), the phase change value is not limited to that in Expression (2), and for example, a method of changing the phase periodically or regularly can be considered.

  (Precoding) matrix in equation (1) and equation (3)

とする。例えば、行列Ｆは、以下のような行列を用いることが考えられる。

And For example, as the matrix F, the following matrix may be used.

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なお、式（５）、式（６）、式（７）、式（８）、式（９）、式（１０）、式（１１）、式（１２）において、αは実数であってもよいし、虚数であってもよく、βは実数であってもよいし、虚数であってもよい。ただし、αは０（ゼロ）ではない。そして、βも０（ゼロ）ではない。

It should be noted that even in the formulas (5), (6), (7), (8), (9), (10), (11), and (12), α may be a real number. It may be an imaginary number, or β may be a real number or an imaginary number. However, α is not 0 (zero). And β is not 0 (zero).

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ただし、θ₁₁（ｉ）、θ₂₁（ｉ）、λ（ｉ）はｉの（シンボル番号の）関数であり（実数）、λは例えば固定の値であり（実数）（固定値でなくてもよい）、αは実数であってもよいし、虚数であってもよく、βは実数であってもよいし、虚数であってもよい。ただし、αは０（ゼロ）ではない。そして、βも０（ゼロ）ではない。また、θ１１、θ２１は実数である。

However, θ ₁₁ (i), θ ₂₁ (i), and λ(i) are functions (of symbol numbers) of i (real number), and λ is, for example, a fixed value (real number) (not a fixed value. , Α may be a real number or an imaginary number, and β may be a real number or an imaginary number. However, α is not 0 (zero). And β is not 0 (zero). Further, θ11 and θ21 are real numbers.

Also, each embodiment of the present specification can be implemented by using a precoding matrix other than these.
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なお、式（３４）、式（３６）のβは実数であってもよいし、虚数であってもよい。ただし、βも０（ゼロ）ではない。また、プリコーディング行列が、式（３３）、式（３４）のようにあらわされた場合、図２における重み付け合成部２０３は、マッピング後の信号２０１Ａ、２０１Ｂに対し、信号処理を施さずに、マッピング後の信号２０１Ａを重み付け合成後の信号２０４Ａとして出力し、マッピング後の信号２０１Ｂを重み付け合成後の信号２０４Ｂとして出力することになる。つまり、重み付け合成部２０３が存在しなくてもよいし、重み付け合成部２０３が存在する場合、制御信号２００によって、重み付け合成を施すか、重み付け合成を行わないか、の制御を行ってもよい。

Note that β in Expressions (34) and (36) may be a real number or an imaginary number. However, β is not 0 (zero). Further, when the precoding matrix is expressed as in Expression (33) and Expression (34), the weighting synthesis unit 203 in FIG. 2 does not perform signal processing on the mapped signals 201A and 201B, The signal 201A after mapping is output as the signal 204A after weighted synthesis, and the signal 201B after mapping is output as the signal 204B after weighted synthesis. That is, the weighting synthesis unit 203 does not have to exist, and when the weighting synthesis unit 203 does exist, the control signal 200 may control whether weighting synthesis is performed or not.

Insertion section 207A receives as input signal 204A after weighted synthesis, pilot symbol signal (pa(t)) (t: time) (251A), preamble signal 252, control information symbol signal 253, and control signal 200, and control signal 200 The baseband signal 208A based on the frame structure is output based on the frame structure information included in.
Similarly, inserting section 207B receives signal 206B after phase change, pilot symbol signal (pb(t)(251B), preamble signal 252, control information symbol signal 253, and control signal 200, and is included in control signal 200. Based on the frame configuration information, the baseband signal 208B based on the frame configuration is output.

The phase changing unit 209B receives the baseband signal 208B and the control signal 200, changes the phase of the baseband signal 208B based on the control signal 200, and outputs the signal 210B after the phase change. It is assumed that the baseband signal 208B is a function of the symbol number i (i is an integer of 0 or more) and is represented by x′(i). Then, the signal 210B(x(i)) after the phase change can be expressed as x(i)=e ^j ×ε ⁽ⁱ⁾ ×x′(i). (J is an imaginary unit)
The operation of the phase changing unit 209B may be CDD (Cyclic Delay Diversity) (CSD (Cyclic Shift Diversity)) described in Non-Patent Document 2 and Non-Patent Document 3. The phase changing unit 209B is characterized in that the phase changing is performed on the symbols existing in the frequency axis direction (the phase changing is performed on the data symbols, pilot symbols, control information symbols, etc.).

Although FIG. 2 illustrates a diagram in which the phase changing unit 209B is inserted, the phase changing unit 209B may not be present. At this time, the baseband signals 208A and 208B become the outputs of FIG. (The phase changing unit 209B does not have to operate.)
FIG. 3 shows an example of the configuration of the signal processing unit 106 in FIG. 1 different from that in FIG. In FIG. 3, those that operate in the same manner as in FIG. 2 are given the same numbers. It should be noted that description of elements that operate in the same manner as in FIG. 2 is omitted here.

  The coefficient multiplication unit 301A receives the mapped signal 201A(s1(i)) and the control signal 200 as input, and multiplies the mapped signal 201A(s1(i)) by a coefficient based on the control signal 200. , And outputs the signal 302A after the coefficient multiplication. When the coefficient is u, the signal 302A after the coefficient multiplication is expressed as u×s1(i). (U may be a real number or a complex number.) However, when u=1, the coefficient multiplication unit 301A multiplies the mapped signal 201A (s1(i)) by the coefficient. And outputs the signal 201A (s1(i)) after mapping as the signal 302A after coefficient multiplication.

  Similarly, the coefficient multiplying unit 301B receives the mapped signal 201B(s2(i)) and the control signal 200 as input, and based on the control signal 200, converts the mapped signal 201B(s2(i)) into a coefficient. And outputs the signal 302B after the coefficient multiplication. When the coefficient is v, the signal 302B after the coefficient multiplication is expressed as v×s2(i). (V may be a real number or a complex number.) However, when v=1, the coefficient multiplication unit 301B multiplies the mapped signal 201B (s2(i)) by the coefficient. And outputs the signal 201B (s2(i)) after mapping as the signal 302B after coefficient multiplication.

  Therefore, the signal 204A(z1(i)) after the weighted combination and the signal 206B(z2(i)) after the phase change can be expressed by the following equations.

なお、（プリコーディング）行列Ｆの例については、前に説明したとおり（たとえば、式（５）から式（３６））であり、また、位相変更の値ｙ（ｉ）の例については、式（２）で示している、ただし、（プリコーディング）行列Ｆ、位相変更の値ｙ（ｉ）については、これらに限ったものではない。

An example of the (precoding) matrix F is as described above (for example, Expression (5) to Expression (36)), and an example of the value y(i) of the phase change is expressed by However, the (precoding) matrix F and the phase change value y(i) are shown by (2), but are not limited to these.

  Next, as used in the description of the present invention, “the modulation method of the signal 201A(s1(i)) after mapping is QPSK (Quadrature Phase Shift Keying) and the modulation method of the signal 201B(s2(i)) after mapping is The (precoding) matrix F and the phase change value y(i) in the case of 16QAM (QAM: Quadrature Amplitude Modulation) will be described.

Note that the average (transmission) power of the signal 201A after mapping and the average (transmission) power of the signal 201B after mapping are equal.
At this time, the signal 204A(z1(i)) after weighted synthesis and the signal 206B(z2(i)) after phase change are obtained as shown in equations (38) to (45). In the receiving device that receives the modulated signal transmitted by the first transmitting device, it is possible to obtain the effect of improving the reception quality of data.

なお、式（３８）から式（４５）において、αおよびβは、実数であってもよいし、虚数であってもよい。
式（３８）から式（４５）の特徴的な点について説明する。

In equations (38) to (45), α and β may be real numbers or imaginary numbers.
The characteristic points of the expressions (38) to (45) will be described.

In equations (38) to (45), θ is defined as π/4 radians (45 degrees). Although the average (transmission) power of the signal 302A after the coefficient multiplication is different from the average (transmission) power of the signal 302B after the coefficient multiplication, by setting “θ to π/4 radians (45 degrees)”, the weighted composite word The average (transmission) power of the signal 204A (z1(i)) and the average (transmission) power of the signal 206B (z2(i)) after the phase change can be made equal, and according to the transmission regulations, "transmit from each antenna". When the average transmission power of the modulated signal is fixed, it is necessary to set θ to π/4 radians (45 degrees). Although “θ is π/4 radians (45 degrees)” here, “θ is π/4 radians (45 degrees), (3×π)/4 radians (135 degrees), (5× Any value of (π)/4 radians (225 degrees) or (7×π)/4 radians (315 degrees) may be used.”
Further, the coefficients u and v are defined as in Expression (38) to Expression (45).

  It should be noted that the symbol generation (for example, z1(i) and z2(i)) has been described with reference to FIGS. 1, 2, and 3 and the method using Equations (1) to (45) as an example. At this time, the generated symbols may be arranged in the time axis direction. When a multi-carrier method such as OFDM (Orthogonal Frequency Division Multiplexing) is used, the generated symbols may be arranged in the frequency axis direction or in the time/frequency direction. Also, the generated symbols may be interleaved (symbols are rearranged) and arranged in the time axis direction, the frequency axis direction, or the time/frequency axis direction. May be. However, the transmitting device transmits z1(i) and z2(i) having the same symbol number i at the same time and using the same frequency (same frequency band).

In FIG. 4, P _QPSK is the average (transmission) power of QPSK, P _16QAM is the average (transmission) power of 16 QAM, the horizontal axis is P _QPSK /(P _QPSK +P _16QAM ), and the vertical axis capacity is each SNR ( Signal-to-Noise power Ratio). (Note that the channel model in the graph is an AWGN (Additive White Gaussian Noise) environment) As can be seen from this result, by setting as in equations (38) to (45), the receiving device can receive good data. The effect that the quality can be obtained can be obtained.

The transmission device of FIG. 1 switches the transmission method of the modulation signal based on the transmission method information included in the control signal 100. The transmitting apparatus of FIG. 1 is assumed to be able to select the following transmitting method.
Transmission method #1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (Binary Phase Shift Keying) (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #2:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is QPSK (Quadrature Phase Shift Keying) (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #3:
A single stream is transmitted (s1(i) is transmitted) (s1(i)) is a modulation method such as 16QAM (or π/2 shift 16QAM) (or in-phase such as 16APSK (APSK: Amplitude Phase Shift Keying). A modulation method (shifting may be performed) in which 16 signal points are present on the I-orthogonal Q plane is used. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #4:
A single stream is transmitted (s1(i) is transmitted.) (s1(i)) modulation method is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK (APSK: Amplitude Phase Shift Keying). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. .

Transmission method #6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .

Transmission method #7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. .

Transmission method #8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. .

Transmission method #9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. .

  At this time, precoding (weighting synthesis) and phase change are performed based on FIGS. 2 and 3 (the phase changing unit 205B does not have to change the phase). It is assumed that the (precoding) matrix of any one of Expressions (20) to (13) is used. However, in Expressions (13) to (20), θ is set to 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).

Then, the following is satisfied.
Transmission method #1:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.

Transmission method #3:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #4:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. However, in the equations (13) to (20), when θ=0 radian is satisfied, the number of signal points in the in-phase I-quadrature Q plane of the transmission signal is two.

Transmission method #6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. However, in the expressions (13) to (20), when θ=0 radian holds, the number of signal points in the in-phase I-quadrature Q plane of the transmission signal is four.
Transmission method #7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 64 or less. However, in the equations (13) to (20), when θ=0 radian is satisfied, the number of signal points on the in-phase I-quadrature Q plane of the first transmission signal is 4, and the in-phase of the second transmission signal is The number of signal points on the I-orthogonal Q plane is 16.

Transmission method #8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16 or more and 256 or less. However, in the equations (13) to (20), when θ=0 radian is satisfied, the number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. However, in the equations (13) to (20), when θ=0 radian is satisfied, the number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.

As described above, the maximum number of signal points when the transmitter of FIG. 1 transmits a single stream modulated signal is 64.
By the way, in the case where the influence of the phase noise in the RF (Radio Frequency) unit included in the radio units 107_A and 107_B and the influence of the non-linear distortion in the transmission power amplifier included in the radio units 107_A and 107_B of the transmitter of FIG. , A PAPR (Peak-to-Average Power Ratio) small modulation method and a modulation method having a signal point arrangement with a small influence of phase noise are desired. Considering this point, it is desirable to reduce the number of signal points in the in-phase I-quadrature Q plane included in the transmission signal (modulation signal). As described above, in the case of a transmission apparatus capable of selecting a plurality of transmission methods, the number of signal points on the in-phase I-quadrature Q plane in the transmission method having the largest number of signal points on the in-phase I-quadrature Q plane is reduced. As a result, the transmitter can suppress the influence of the phase noise of the RF section and the influence of the non-linear distortion in the transmission power amplifier, so that the transmitter of FIG. 1 receives the modulated signal. In the receiving device, it is possible to obtain the effect of improving the reception quality of data. Further, when the transmitter of FIG. 1 transmits a modulated signal in which the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small, the circuit scale of the RF unit and the transmission power amplifier in the transmitter is reduced. It is also possible to obtain the effect that the size can be reduced. (When the PAPR greatly changes for each modulation method, for example, an RF unit and a transmission power increase section are prepared for each modulation method, which increases the circuit scale.)
As described above, the maximum number of signal points when the transmitter of FIG. 1 transmits a single stream modulated signal is 64. Therefore, if the maximum number of signal points when the transmitter of FIG. 1 transmits modulated signals of two streams can be suppressed to 64, the effect described above can be obtained.

  On the other hand, when the transmitter of FIG. 1 transmits modulated signals of two streams, if the signal of s1(i) is transmitted by a plurality of antennas and the signal of s2(i) is transmitted by a plurality of antennas, the transmission diversity Therefore, the receiving device that receives the modulated signal transmitted by the transmitting device of FIG. 1 can obtain the effect of improving the reception quality of data. However, in order to obtain this effect, it is important that the modulated signal transmitted by the transmitter of FIG. 1 is less affected by the phase noise in the RF section and the nonlinear distortion in the transmission power amplifier.

Based on the above, consider the first selection method or the second selection method.
First selection method:
The transmission device of FIG. 1 switches the transmission method of the modulation signal based on the transmission method information included in the control signal 100. At this time, the transmitting apparatus of FIG. 1 can select the following transmitting methods.

Transmission method #1-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #1-2:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #1-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #1-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #1-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #1-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #1-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).) (If θ=π/4 radians (45 degrees), the average of modulated signals transmitted from each antenna is assumed. Transmission power becomes equal.)
Transmission method #1-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #1-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
The first selection method does not have to support all the transmission methods #1-1 to #1-9. For example, in the first selection method, one or more transmission methods among three transmission methods of transmission method #1-5, transmission method #1-6, and transmission method #1-7 may be supported. .. Then, the first transmission method only needs to correspond to one or more transmission methods out of the two transmission methods #1-8 and #1-9.

Also, the first selection method may not correspond to the transmission method #1-1. (In the first selection method, the transmission method #1-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The first selection method may include transmission methods other than the transmission methods #1-1 to #1-9.
At this time, the following is satisfied.

Transmission method #1-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #1-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #1-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #1-4:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #1-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 2 and 4 or less. It is possible to obtain the effect of transmission diversity.

Transmission method #1-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 16 or less. It is possible to obtain the effect of transmit diversity.
Transmission method #1-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #1-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #1-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Since the transmitter has the characteristics as described above, and therefore the first selection method can reduce the influence of the phase noise of the RF unit and the influence of the nonlinear distortion in the transmission power amplifier in the transmitter of FIG. In addition, in transmission method #1-5 to transmission method #1-7, the effect of transmission diversity can be obtained. Therefore, in the receiving device that receives the modulated signal transmitted by the transmitting device of FIG. 1, it is possible to obtain the effect of improving the reception quality of data.

Second selection method:
Transmission method #2-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #2-2:
The modulation method of transmitting a single stream (transmitting s1(i)) (of s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #2-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #2-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #2-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #2-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #2-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).) (If θ=π/4 radians (45 degrees), the average of modulated signals transmitted from each antenna is assumed. Transmission power becomes equal.)
Transmission method #2-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #2-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Note that the second selection method does not have to support all the transmission methods #2-1 to #2-9. For example, in the second selection method, one or more of the three transmission methods of transmission method #2-5, transmission method #2-6, and transmission method #2-7 may be supported. .. The second transmission method only needs to support one or more transmission methods out of the two transmission methods #2-8 and #2-9.

Further, the second selection method may not correspond to the transmission method #2-1. (In the second selection method, transmission method #2-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The second selection method may include transmission methods other than transmission method #2-1 to transmission method #2-9.
At this time, the following is satisfied.

Transmission method #2-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #2-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #2-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #2-4:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #2-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. There are cases where it is possible to obtain the effect of transmit diversity.

Transmission method #2-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. There are cases where it is possible to obtain the effect of transmit diversity.
Transmission method #2-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmission diversity.

Transmission method #2-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #2-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Since the transmitter has the above-mentioned characteristics, and thus the second selection method is used, the influence of the phase noise of the RF unit and the influence of the non-linear distortion in the transmission power amplifier can be reduced in the transmitter of FIG. In addition, in transmission method #2-5 to transmission method #2-7, it may be possible to obtain the effect of transmission diversity. Therefore, in the receiving device that receives the modulated signal transmitted by the transmitting device of FIG. 1, it is possible to obtain the effect of improving the reception quality of data.

Further, the third selection method may be a combination of the first selection method and the second selection method.
Third selection method:
The transmission device of FIG. 1 switches the transmission method of the modulated signal based on the transmission method information included in the control signal 100. At this time, as the transmission method of FIG. 1, the following transmission methods can be selected.

Transmission method #3-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #3-2:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #3-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #3-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #3-5:
Either transmission method #1-5 or transmission method #2-5.

Transmission method #3-6:
Transmission method #1-6 or transmission method #2-6.
Transmission method #3-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #3-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #3-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (may be shifted), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Note that the third selection method does not have to support all the transmission methods from the transmission method #3-1 to the transmission method #3-9. For example, in the third selection method, one or more of the three transmission methods of transmission method #3-5, transmission method #3-6, and transmission method #3-7 may be supported. .. Then, the third transmission method only needs to support one or more transmission methods out of the two transmission methods #3-8 and #3-9.

Further, the third selection method may not correspond to the transmission method #3-1. (In the third selection method, the transmission method #3-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The third selection method may include transmission methods other than transmission method #3-1 to transmission method #3-9.
By adopting the third selection method, it is possible to reduce the influence of the phase noise of the RF unit and the influence of the non-linear distortion in the transmission power amplifier in the transmitting apparatus of FIG. In method #3-7, it may be possible to obtain the effect of transmission diversity. Therefore, in the receiving device that receives the modulated signal transmitted by the transmitting device of FIG. 1, it is possible to obtain the effect of improving the reception quality of data.

  FIG. 5 is an example of a configuration of the radio units 107_A and 107_B of the OFDM (Orthogonal Frequency Division Multiplexing) FIG. 1 in the transmitting apparatus of FIG. The serial-parallel conversion unit 502 receives the signal 501 and the control signal 500 (corresponding to the control signal 100 in FIG. 1) as input, performs serial-parallel conversion based on the control signal 500, and outputs the signal 503 after serial-parallel conversion. Is output.

The inverse Fourier transform unit 504 receives the signal 503 after serial-parallel conversion and the control signal 500 as an input, and based on the control signal 500, an inverse Fourier transform (for example, an inverse fast Fourier transform (IFFT)). And outputs the signal 505 after the inverse Fourier transform.
The processing unit 506 receives the signal 505 after the inverse Fourier transform and the control signal 500 as input, performs processing such as frequency conversion and amplification based on the control signal 500, and outputs a modulated signal 507.

(For example, when the signal 501 is the signal 106_A after the signal processing in FIG. 1, the modulated signal 507 corresponds to the transmission signal 108_A in FIG. 1. Further, when the signal 501 is the signal 106_B after the signal processing in FIG. , Modulated signal 507 corresponds to transmission signal 108_B in FIG. 1.)
FIG. 6 is a frame configuration of the transmission signal 108_A of FIG. In FIG. 6, the horizontal axis represents frequency (carrier) and the vertical axis represents time. Since a multi-carrier transmission system such as OFDM is used, symbols exist in the carrier direction. Then, in FIG. 6, symbols of carrier 1 to carrier 36 are shown. Further, in FIG. 6, symbols from time $1 to time $11 are shown.

  Reference numeral 601 in FIG. 6 indicates a pilot symbol (corresponding to pilot signal 251A (pa(t) in FIGS. 2 and 3)), reference numeral 602 indicates a data symbol, and reference numeral 603 indicates another symbol. At this time, the pilot symbol is, for example, a PSK (Phase Shift Keying) symbol, and is a symbol for a receiving apparatus that receives this frame to perform channel estimation (estimation of channel variation) and frequency offset/phase variation. Therefore, for example, the transmitter of FIG. 1 and the receiver of FIG. 6 for receiving the frame may share the pilot symbol transmission method.

By the way, the signal 201A after mapping (the signal 105_1 after mapping in FIG. 1) is named “stream #1”, and the signal 201B after mapping (signal 105_2 after mapping in FIG. 1) is named “stream #2”. Note that this point is the same in the following description.
The data symbol 602 is a symbol corresponding to the data symbol included in the baseband signal 208A generated by the signal processing according to FIGS. 2 and 3, and therefore, the data symbol 602 includes the “stream #1” symbol and the “stream #1” symbol. It is either a symbol including both of the symbols of “#2””, “a symbol of “stream #1””, or “a symbol of “stream #2””. It depends on the configuration of the precoding matrix used. (That is, the data symbol 602 corresponds to the signal 204A(z1(i)) after weighted synthesis.)
The other symbols 603 are assumed to be symbols corresponding to the preamble signal 252 and the control information symbol signal 253 in FIGS. 2 and 3. (However, the other symbols may include symbols other than the preamble and the control information symbol.) At this time, the preamble may transmit data (for control), a symbol for signal detection, It is composed of symbols for frequency synchronization/time synchronization, symbols for channel estimation (symbols for estimating channel fluctuation), and the like. Then, the control information symbol becomes a symbol including control information for realizing the demodulation/decoding of the data symbol by the receiving device which receives the frame of FIG.

  For example, carriers 1 to 36 from time $1 to time 4 in FIG. 6 are other symbols 603. Then, carriers 1 to 11 at time $5 become data symbols 602. Thereafter, carrier 12 at time $5 becomes pilot symbol 601, carrier 13 at time $5 to carrier 23 becomes data symbol 602, carrier 24 at time $5 becomes pilot symbol 601,..., Carrier at time $6. 1. Carrier 2 becomes data symbol 602, carrier 3 at time $6 becomes pilot symbol 601,..., Carrier 30 at time $11 becomes pilot symbol 601, and carrier 31 to carrier 36 at time $11 data symbol. It becomes 602.

  FIG. 7 is a frame configuration of the transmission signal 108_B of FIG. In FIG. 7, the horizontal axis represents frequency (carrier) and the vertical axis represents time. Since a multi-carrier transmission system such as OFDM is used, symbols exist in the carrier direction. Then, in FIG. 7, symbols of carrier 1 to carrier 36 are shown. Further, in FIG. 7, symbols from time $1 to time $11 are shown.

  Reference numeral 701 in FIG. 7 denotes a pilot symbol (corresponding to the pilot signal 251B (pb(t) in FIGS. 2 and 3)), 702 is a data symbol, and 703 is another symbol. At this time, the pilot symbol is, for example, a PSK symbol, and is a symbol for the receiving apparatus that receives this frame to perform channel estimation (estimation of propagation path variation) and frequency offset/phase variation. It is preferable that the transmitter of FIG. 1 and the receiver of FIG. 7 receiving the frame share the pilot symbol transmission method.

The data symbol 702 is a symbol corresponding to the data symbol included in the baseband signal 208B generated by the signal processing according to FIGS. 2 and 3. Therefore, the data symbol 702 includes the “stream #1” symbol and the “stream #1” symbol. It is either a symbol including both of the symbols of “#2””, “a symbol of “stream #1””, or “a symbol of “stream #2””. It depends on the configuration of the precoding matrix used. (That is, the data symbol 702 corresponds to the signal 206B(z2(i)) after the phase change.)
The other symbols 703 are assumed to be symbols corresponding to the preamble signal 252 and the control information symbol signal 253 in FIGS. 2 and 3. (However, other symbols may include symbols other than the preamble and the control information symbol.) At this time, the preamble may transmit data (for control), a symbol for signal detection, It is composed of symbols for frequency synchronization/time synchronization, symbols for channel estimation (symbols for estimating channel fluctuation), and the like. Then, the control information symbol becomes a symbol including control information for realizing the demodulation/decoding of the data symbol by the receiving device which receives the frame of FIG. 7.

  For example, carriers 1 to 36 from time $1 to time 4 in FIG. 7 are other symbols 703. Then, carriers 1 to 11 at time $5 become data symbols 702. Thereafter, carrier 12 at time $5 becomes pilot symbol 701, carrier 13 at time $5 to carrier 23 becomes data symbol 702, carrier 24 at time $5 becomes pilot symbol 701,..., Carrier at time $6. 1. Carrier 2 becomes data symbol 702, carrier 3 at time $6 becomes pilot symbol 701,... Carrier 30 at time $11 becomes pilot symbol 701, and carrier 31 to carrier 36 at time $11 data symbol. It becomes 702.

  When a symbol exists at carrier A at time $B in FIG. 6 and a symbol exists at carrier A at time $B in FIG. 7, a symbol at carrier A at time $B in FIG. 6 and carrier A at time in FIG. The $B symbol will be transmitted on the same frequency at the same time. The frame configuration is not limited to those shown in FIGS. 6 and 7, but FIGS. 6 and 7 are merely examples of the frame configuration.

  The other symbols in FIGS. 6 and 7 are symbols corresponding to “the preamble signal 252 and the control symbol 253 in FIGS. 2 and 3”, and therefore the same time as the other symbol 603 in FIG. Other symbols 703 in FIG. 7 having the same frequency (same carrier), when transmitting control information, are transmitting the same data (same control information).

Although it is assumed that the receiving apparatus receives the frame of FIG. 6 and the frame of FIG. 7 at the same time, the receiving apparatus receives the frame of FIG. 6 only or the frame of FIG. It is possible to obtain the data transmitted by the transmitter.
FIG. 8 shows an example of the configuration of a portion related to control information generation for generating the control information symbol signal 253 of FIGS.

The control information mapping unit 802 receives the control information data 801 and the control signal 800 as input, performs a mapping on the control information data 801 by a modulation method based on the control signal 800, and outputs the control information mapped signal. 803 is output. The control information mapping signal 803 corresponds to the control information symbol signal 253 in FIGS. 2 and 3.
FIG. 9 shows an example of the configuration of the antenna unit #A (109_A) and the antenna #B (109_B) in FIG. (This is an example in which antenna section #A (109_A) and antenna section #B (109_B) are configured with a plurality of antennas.)
Distribution section 902 receives transmission signal 901 as input, performs distribution, and outputs transmission signals 903_1, 903_2, 903_3, 903_4.

The multiplication unit 904_1 receives the transmission signal 903_1 and the control signal 900, multiplies the transmission signal 903_1 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 900, and outputs the signal 905_1 after the multiplication. The signal 905_1 after the multiplication is output from the antenna 906_1 as a radio wave.
When the transmission signal 903_1 is Tx1(t) (t: time) and the multiplication coefficient is W1 (W1 can be defined as a complex number, and thus may be a real number), the signal 905_1 after multiplication is Tx1. It is expressed as (t)×W1.

The multiplication unit 904_2 receives the transmission signal 903_2 and the control signal 900, multiplies the transmission signal 903_2 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 900, and outputs the signal 905_2 after the multiplication. The signal 905_2 after the multiplication is output from the antenna 906_2 as a radio wave.
When the transmission signal 903_2 is Tx2(t) and the multiplication coefficient is W2 (W2 can be defined as a complex number, and thus may be a real number), the signal 905_2 after multiplication is Tx2(t)×W2. Is represented.

The multiplication unit 904_3 receives the transmission signal 903_3 and the control signal 900, multiplies the transmission signal 903_3 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 900, and outputs the signal 905_3 after the multiplication. The signal 905_3 after the multiplication is output from the antenna 906_3 as a radio wave.
When the transmission signal 903_3 is Tx3(t) and the multiplication coefficient is W3 (W3 can be defined as a complex number and therefore may be a real number), the signal 905_3 after multiplication is Tx3(t)×W3. Is represented.

The multiplication unit 904_4 receives the transmission signal 903_4 and the control signal 900, multiplies the transmission signal 903_4 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 900, and outputs the signal 905_4 after the multiplication. The signal 905_4 after the multiplication is output from the antenna 906_4 as a radio wave.
When the transmission signal 903_4 is Tx4(t) and the multiplication coefficient is W4 (W4 can be defined as a complex number and therefore may be a real number), the signal 905_4 after multiplication is Tx4(t)×W4. Is represented.

Note that "the absolute value of W1, the absolute value of W2, the absolute value of W3, and the absolute value of W4 are equal". At this time, this corresponds to the phase change. (Of course, the absolute value of W1, the absolute value of W2, the absolute value of W3, and the absolute value of W4 may not be equal.)
Further, in FIG. 9, the antenna unit is described as an example including four antennas (and four multiplication units), but the number of antennas is not limited to four, and two antennas are used. It only has to be composed of the above antennas.

  When the configuration of antenna section #A (109_A) in FIG. 1 is FIG. 9, transmission signal 901 corresponds to transmission signal 108_A in FIG. Further, when the configuration of the antenna unit #B (109_B) in FIG. 1 is FIG. 9, the transmission signal 901 corresponds to the transmission signal 108_B in FIG. 1 and corresponds to the transmission signal 108_B in FIG. However, the antenna section #A (109_A) and the antenna section #B (109_B) do not have to have the configuration shown in FIG. 9, and as described above, the antenna section does not receive the control signal 100 as an input. May be. For example, the antenna unit #A (109_A) and the antenna unit #B (109_B) in FIG. 1 may be configured by one antenna or may be configured by a plurality of antennas.

FIG. 10 is an example of the frame configuration of the transmission signal 108_A of FIG. In FIG. 10, the horizontal axis represents time. 10 is different from FIG. 6 in that the frame configuration in FIG. 10 is an example of the frame configuration in the single carrier system, and symbols are present in the time direction. Then, in FIG. 10, symbols from time t1 to time t22 are shown.
The preamble 1001 in FIG. 10 corresponds to the preamble signal 252 in FIGS. 2 and 3. At this time, the preamble may transmit data (for control), a symbol for signal detection, a symbol for frequency synchronization/time synchronization, a symbol for channel estimation (channel variation). (Symbol for estimating) and so on.

The control information symbol 1002 in FIG. 10 is a symbol corresponding to the control information symbol signal 253 in FIGS. 2 and 3, and is a control for the receiving device that receives the frame in FIG. It is a symbol that contains information.
The pilot symbol 1004 in FIG. 10 is a symbol corresponding to the pilot signal 251A (pa(t)) in FIGS. 2 and 3, and the pilot symbol 1004 is, for example, a PSK symbol, and a receiving device that receives this frame. Is a symbol for channel estimation (estimation of channel fluctuation) and frequency offset estimation/phase variation estimation. For example, the transmitter of FIG. 1 and the receiver of FIG. You should share the transmission method.

Then, 1003 in FIG. 10 is a data symbol for transmitting data.
The signal 201A after mapping (signal 105_1 after mapping in FIG. 1) is named “stream #1”, and the signal 201B after mapping (signal 105_2 after mapping in FIG. 1) is named “stream #2”.
The data symbol 1003 is a symbol corresponding to the data symbol included in the baseband signal 208A generated by the signal processing according to FIGS. 2 and 3, and therefore, the data symbol 1003 includes the “stream #1” symbol and the “stream #1” symbol. It is either a symbol including both of the symbols of “#2””, “a symbol of “stream #1””, or “a symbol of “stream #2””. It depends on the configuration of the precoding matrix used. (That is, the data symbol 1003 corresponds to the signal 204A(z1(i)) after weighted synthesis.)
Although not shown in FIG. 10, the frame may include symbols other than the preamble, the control information symbol, the data symbol, and the pilot symbol.

  For example, the transmitting apparatus transmits the preamble 1001 at time t1 in FIG. 10, the control information symbol 1002 at time t2, the data symbol 1003 from time t3 to t11, and the pilot symbol 1004 at time t12. Data symbols 1003 are transmitted from time t13 to t21, and pilot symbol 1004 is transmitted from time t22.

FIG. 11 is an example of a frame configuration of the transmission signal 108_B of FIG. In FIG. 11, the horizontal axis represents time. 11 is different from FIG. 7 in that the frame configuration of FIG. 11 is an example of the frame configuration in the single carrier system, and symbols are present in the time direction. Then, in FIG. 11, symbols from time t1 to t22 are shown.
The preamble 1101 in FIG. 11 corresponds to the preamble signal 252 in FIGS. 2 and 3. At this time, the preamble may transmit data (for control), a symbol for signal detection, a symbol for frequency synchronization/time synchronization, a symbol for channel estimation (channel variation). (Symbol for estimating) and so on.

The control information symbol 1102 in FIG. 11 is a symbol corresponding to the control information symbol signal 253 in FIGS. 2 and 3, and is a control for the receiving device receiving the frame in FIG. 11 to realize demodulation/decoding of data symbols. It is a symbol that contains information.
The pilot symbol 1104 in FIG. 11 is a symbol corresponding to the pilot signal 251B (pb(t)) in FIGS. 2 and 3, and the pilot symbol 1104 is, for example, a PSK symbol, and a receiving device that receives this frame. Is a symbol for channel estimation (estimation of channel fluctuation) and frequency offset estimation/phase fluctuation estimation. For example, the transmitter of FIG. 1 and the receiver of FIG. It is good to share the transmission method.

Then, 1103 in FIG. 11 is a data symbol for transmitting data.
The signal 201A after mapping (signal 105_1 after mapping in FIG. 1) is named “stream #1”, and the signal 201B after mapping (signal 105_2 after mapping in FIG. 1) is named “stream #2”.
The data symbol 1103 is a symbol corresponding to the data symbol included in the baseband signal 208B generated by the signal processing according to FIGS. It is either a symbol including both of the symbols of “#2””, “a symbol of “stream #1””, or “a symbol of “stream #2””. It depends on the configuration of the precoding matrix used. (That is, the data symbol 1103 corresponds to the signal 206B(z2(i)) after the phase change.)
Although not shown in FIG. 11, the frame may include symbols other than the preamble, the control information symbol, the data symbol, and the pilot symbol.

  For example, the transmitting device transmits the preamble 1101 at time t1 in FIG. 11, the control information symbol 1102 at time t2, the data symbol 1103 from time t3 to t11, and the pilot symbol 1104 at time t12. Data symbols 1103 are transmitted from time t13 to t21, and pilot symbols 1104 are transmitted at time t22.

  When a symbol exists at time tp in FIG. 10 and a symbol exists at time tp in FIG. 10 (p is an integer of 1 or more), the symbol at time tp in FIG. 10 and the symbol at time tp in FIG. , Will be transmitted on the same frequency. (For example, the data symbol at time t3 in FIG. 10 and the data symbol at time t3 in FIG. 11 are transmitted at the same time and the same frequency.) Note that the frame configuration is limited to that in FIGS. 10 and 11. FIG. 10 and FIG. 11 are examples of the frame structure, which is not the case.

The preamble and control information symbol in FIGS. 10 and 11 may be the same data (the same control information).
Although it is assumed that the receiving device receives the frame of FIG. 10 and the frame of FIG. 11 at the same time, the receiving device receives the frame of FIG. It is possible to obtain the data transmitted by the transmitter.

FIG. 12 shows an example of a method of arranging symbols with respect to the time axis of the signal 204A (z1(i)) after the weighted combination and the signal 206B (z2(i)) after the phase change.
In FIG. 12, for example, zp(0) is shown. At this time, p is 1 or 2. Therefore, zp(0) in FIG. 12 represents “z1(i), z2(i), z1(0), z2(0) when the symbol number i=0”. Similarly, zp(1) represents “z1(1), z2(1) when symbol number i=1 in z1(i), z2(i)”. (That is, zp(X) represents “z1(X), z2(X) when the symbol number i=X in z1(i), z2(i)”.) The same applies to FIGS. 13, 14, and 15.

  As shown in FIG. 12, the symbol zp(0) having the symbol number i=0 is arranged at time 0, the symbol zp(1) having the symbol number i=1 is arranged at time 1, and the symbol zp(1) is arranged at the symbol number i=2. By arranging zp(2) at time 2, the symbol zp(3) having the symbol number i=3 at time 3, and so on, the signal 204A (z1(i)) after weighted synthesis is arranged. , And symbols are arranged on the time axis of the signal 206B(z2(i)) after the phase change. However, FIG. 12 is an example, and the relationship between the symbol number and the time is not limited to this.

FIG. 13 shows an example of a symbol arrangement method with respect to the frequency axis of the signal 204A (z1(i)) after weighted combination and the signal 206B (z2(i)) after phase change.
As shown in FIG. 13, the symbol zp(0) having the symbol number i=0 is arranged in the carrier 0, the symbol zp(1) having the symbol number i=1 is arranged in the carrier 1, and the symbol zp(0) is the symbol having the symbol number i=2. By assigning zp(2) to carrier 2, symbol zp(3) with symbol number i=3 to carrier 3, and so on, the signal 204A (z1(i)) after weighted synthesis is assigned. , And symbols are arranged on the frequency axis of the signal 206B(z2(i)) after the phase change. However, FIG. 13 is an example, and the relationship between the symbol number and the frequency is not limited to this.

FIG. 14 shows an example of the arrangement of symbols on the time/frequency axis of the signal 204A (z1(i)) after weighted synthesis and the signal 206B (z2(i)) after phase change.
As shown in FIG. 14, the symbol zp(0) having the symbol number i=0 is arranged at time 0 and carrier 0, and the symbol zp(1) having the symbol number i=1 is arranged at time 0 carrier 1 and By arranging the symbol zp(2) with number i=2 at time 1/carrier 0, the symbol zp(3) with symbol number i=3 at time 1/carrier 1, and so on, Symbols are arranged on the time/frequency axis of the signal 204A (z1(i)) after weighted synthesis and the signal 206B (z2(i)) after phase change. However, FIG. 14 is an example, and the relationship between the symbol number and the time/frequency is not limited to this.

FIG. 15 shows an example of arrangement of symbols with respect to time of the signal 204A (z1(i)) after weighted synthesis and the signal 206B (z2(i)) after phase change. Note that the example of FIG. 15 shows an example of the arrangement of symbols when the radio units 107_A and 107_B of FIG. 1 include an interleaver (a portion that rearranges symbols). (Note that the configuration of radio sections 107_A and 107_B in FIG. 1 when including an interleaver (a portion that rearranges symbols) will be described later with reference to FIG. 18.)
As shown in FIG. 15, the symbol zp(0) with the symbol number i=0 is arranged at time 0, the symbol zp(1) with the symbol number i=1 is arranged at time 16, and the symbol number i=2. , Zp(2) of symbol number i=3, and zp(3) of symbol number i=3 are arranged at time 5,... (I)), and symbols are arranged on the time axis of the signal 206B(z2(i)) after the phase change. However, FIG. 15 is an example, and the relationship between the symbol number and time is not limited to this.

FIG. 16 shows an example of arrangement of symbols with respect to time of the signal 204A (z1(i)) after weighted combination and the signal 206B (z2(i)) after phase change. Note that the example of FIG. 16 illustrates an example of symbol arrangement when the radio units 107_A and 107_B of FIG. 1 include an interleaver (a portion that rearranges symbols). (Note that the configuration of radio sections 107_A and 107_B in FIG. 1 when including an interleaver (a portion that rearranges symbols) will be described later with reference to FIG. 18.)
As shown in FIG. 16, the symbol zp(0) having the symbol number i=0 is arranged in the carrier 0, the symbol zp(1) having the symbol number i=1 is arranged in the carrier 16, and the symbol number i=2. , The symbol zp(2) of symbol No. i=3 is allocated to the carrier 5, and so on. (I)), and symbols are arranged on the time axis of the signal 206B(z2(i)) after the phase change. However, FIG. 16 is an example, and the relationship between the symbol number and the frequency is not limited to this.

FIG. 17 shows an example of arrangement of symbols with respect to time of the signal 204A (z1(i)) after weighted combination and the signal 206B (z2(i)) after phase change. The example of FIG. 17 shows an example of symbol arrangement when the radio units 107_A and 107_B of FIG. 1 include an interleaver (a portion that rearranges symbols). (Note that the configuration of radio sections 107_A and 107_B in FIG. 1 when including an interleaver (a portion that rearranges symbols) will be described later with reference to FIG. 18.)
As shown in FIG. 17, the symbol zp(0) having the symbol number i=0 is arranged at time 1 and carrier 1, and the symbol zp(1) having the symbol number i=1 is arranged at time 3 and carrier 3. , The symbol zp(2) with the symbol number i=2 is arranged at the time 1/carrier 0, the symbol zp(3) with the symbol number i=3 is arranged at the time 1/carrier 3, and so on. By doing so, symbols are arranged on the time axis of the signal 204A (z1(i)) after weighted synthesis and the signal 206B (z2(i)) after phase change. However, FIG. 17 is an example, and the relationship between the symbol number and time/frequency is not limited to this.

FIG. 18 shows an arrangement example of symbols when the radio units 107_A and 107_B of FIG. 1 include an interleaver (a portion that rearranges symbols).
An interleaver (reordering unit) 1802 receives the signal-processed signal 1801 (corresponding to 105_1 and 105_2 in FIG. 1) and the control signal 1800 (corresponding to 100 in FIG. 1), and, for example, according to the control signal 1800. , Symbols are rearranged, and the rearranged signal 1803 is output. An example of rearrangement of symbols is as described with reference to FIGS. 14 to 17.

  The signal processing unit 1804 receives the rearranged signal 1803 and the control signal 1800, performs signal processing according to the control signal 1800, and outputs the signal-processed signal 1805. For example, when the transmitting apparatus of FIG. 1 is compatible with both the single carrier system and the OFDM system, the signal processing unit 1804 may perform the single carrier system signal processing or the OFDM system signal processing based on the control signal 1800. Will be done.

The RF unit 1806 receives the signal 1805 after the signal processing and the control signal 1800 as input, performs processing such as frequency conversion based on the control signal 1800, and outputs the modulated signal 1807.
The transmission power amplifier 1808 receives the modulated signal 1807, amplifies the signal, and outputs the modulated signal 1809.
19 shows an example of the configuration of the receiving apparatus that receives the modulated signal when the transmitting apparatus of FIG. 1 transmits the frame configuration of FIGS. 6 and 7, or the transmitting signal of FIG. 10 and FIG. 11, for example. ing.

Radio section 1903X receives received signal 1902X received by antenna section #X (1901X) as input, performs processes such as frequency conversion and Fourier transform, and outputs baseband signal 1904X.
Similarly, the radio unit 1903Y receives the received signal 1902Y received by the antenna unit #Y (1901Y) as input, performs processes such as frequency conversion and Fourier transform, and outputs a baseband signal 1904Y.

Note that although the antenna section #X (1901X) and the antenna section #Y (1901Y) have a configuration in which the control signal 1910 is input in FIG. 19, the configuration is such that the control signal 1910 is not input. Good. The operation when the control signal 1910 is present as an input will be described in detail later.
By the way, FIG. 20 shows the relationship between the transmitting device and the receiving device. The antennas 2001_1 and 2001_2 in FIG. 20 are transmitting antennas, and the antenna 2001_1 in FIG. 20 corresponds to the antenna unit #A (109_A) in FIG. The antenna 2001_2 in FIG. 20 corresponds to the antenna unit #B (109_B) in FIG.

The antennas 2002_1 and 2002_2 in FIG. 20 are receiving antennas, and the antenna 2002_1 in FIG. 20 corresponds to the antenna unit #X (1901X) in FIG. The antenna 2002_2 in FIG. 20 corresponds to the antenna unit #Y (1901Y) in FIG.
As shown in FIG. 20, a signal transmitted from the transmission antenna 2001_1 is u1(i), a signal transmitted from the transmission antenna 2001_2 is u2(i), a signal received by the reception antenna 2002_1 is r1(i), and the reception antenna 2002_2 is received. The signal to be used is r2(i). Note that i indicates a symbol number, and is an integer of 0 or more, for example.

  The propagation coefficient from the transmitting antenna 2001_1 to the receiving antenna 2002_1 is h11(i), the propagation coefficient from the transmitting antenna 2001_1 to the receiving antenna 2002_2 is h21(i), and the propagation coefficient from the transmitting antenna 2001_2 to the receiving antenna 2002_1 is h12( i), the propagation coefficient from the transmitting antenna 2001_2 to the receiving antenna 2002_2 is h22(i). Then, the following relational expression holds.

なお、ｎ１（ｉ）、ｎ２（ｉ）はノイズである。
図１９の変調信号ｕ１のチャネル推定部１９０５＿１は、ベースバンド信号１９０４Ｘを入力とし、図６、図７（または、図１０、図１１）におけるプリアンブル、および／または、パイロットシンボルを用いて、変調信号ｕ１のチャネル推定、つまり、式（４６）のｈ１１（ｉ）を推定し、チャネル推定信号１９０６＿１を出力する。

Note that n1(i) and n2(i) are noises.
Channel estimation section 1905_1 for modulated signal u1 in FIG. 19 receives baseband signal 1904X as input, and uses the preamble and/or pilot symbols in FIGS. 6 and 7 (or FIGS. 10 and 11) to modulate the modulated signal. The channel estimation of u1, that is, h11(i) of the equation (46) is estimated, and the channel estimation signal 1906_1 is output.

Channel estimation section 1905_2 of modulated signal u2 receives baseband signal 1904X as input, and uses preamble and/or pilot symbol in FIG. 6 and FIG. 7 (or FIG. The estimation, that is, h12(i) in the equation (46) is estimated and the channel estimation signal 1906_2 is output.
Channel estimation section 1907_1 of modulated signal u1 receives baseband signal 1904Y as input, and uses preamble and/or pilot symbol in FIG. 6 and FIG. 7 (or FIG. The estimation, that is, h21(i) of the equation (46) is estimated and the channel estimation signal 1908_1 is output.

Channel estimation section 1907_2 of modulated signal u2 receives baseband signal 1904Y as input, and uses preamble and/or pilot symbol in FIG. 6, FIG. 7 (or FIG. 10, FIG. 11) to modulate modulated signal u2. Channel estimation, that is, h22(i) in equation (46) is estimated, and channel estimation signal 1908_2 is output.
The control information decoding unit 1909 receives the baseband signals 1904X and 1904Y as input, demodulates/decodes the control information in FIGS. 6 and 7 (or FIGS. 10 and 11), and outputs a control signal 1910 including the control information. To do.

  The signal processing unit 1911 receives the channel estimation signals 1906_1, 1906_2, 1908_1, 1908_2, the baseband signals 1904X, 1904Y, and the control signal 1910 as input, uses the relationship of Expression (46), and controls information in the control signal 1910 (for example, , Modulation system, and error correction code-related system information), demodulation and decoding are performed, and received data 1912 is output.

Note that the control signal 1910 does not have to be generated by the method shown in FIG. For example, the control signal 1910 in FIG. 19 may be generated based on the information transmitted by the device as the communication partner (FIG. 1) in FIG. 8, or the device in FIG. 19 includes an input unit. , May be generated based on the information input from the input unit.
FIG. 21 shows an example of the configuration of the antenna unit #X (1901X) and the antenna unit #Y (1901Y) of FIG. (This is an example in which the antenna section #X (1901X) and the antenna section #Y (1901Y) are composed of a plurality of antennas.)
The multiplication unit 2103_1 receives the received signal 2102_1 and the control signal 2100 received by the antenna 2101_1, multiplies the received signal 2102_1 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 2100, and obtains the signal 2104_1 after the multiplication. Output.

When the received signal 2102_1 is Rx1(t) (t: time) and the multiplication coefficient is D1 (D1 can be defined as a complex number, and thus may be a real number), the signal 2104_1 after multiplication is Rx1. It is expressed as (t)×D1.
The multiplication unit 2103_2 receives the received signal 2102_2 and the control signal 2100 received by the antenna 2101_2, multiplies the received signal 2102_2 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 2100, and obtains the signal 2104_2 after the multiplication. Output.

When the received signal 2102_2 is Rx2(t) and the multiplication coefficient is D2 (D2 can be defined as a complex number and therefore may be a real number), the signal 2104_2 after multiplication is Rx2(t)×D2. Is represented.
The multiplication unit 2103_3 receives the received signal 2102_3 and the control signal 2100 received by the antenna 2101_3, multiplies the received signal 2102_3 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 2100, and obtains the signal 2104_3 after the multiplication. Output.

When the received signal 2102_3 is Rx3(t) and the multiplication coefficient is D3 (D3 can be defined as a complex number, and thus may be a real number), the signal 2104_3 after multiplication is Rx3(t)×D3. Is represented.
The multiplication unit 2103_4 receives the received signal 2102_4 and the control signal 2100 received by the antenna 2101_4, multiplies the received signal 2102_4 by the multiplication coefficient based on the information of the multiplication coefficient included in the control signal 2100, and obtains the signal 2104_4 after the multiplication. Output.

If the received signal 2102_4 is Rx4(t) and the multiplication coefficient is D4 (D4 can be defined as a complex number, and thus may be a real number), the signal 2104_4 after multiplication is Rx4(t)×D4. Is represented.
The synthesizing unit 2105 receives the signals 2104_1, 2104_2, 2104_3, 1004_4 after the multiplication, synthesizes the signals 2104_1, 2104_2, 2104_3, 2104_4 after the multiplication, and outputs the signal 2106 after the synthesis. The combined signal 2106 is expressed as Rx1(t)×D1+Rx2(t)×D2+Rx3(t)×D3+Rx4(t)×D4.

In FIG. 21, the antenna unit is described as an example including four antennas (and four multiplication units), but the number of antennas is not limited to four, and two or more antennas are used. It only has to be configured.
When the antenna section #X (1901X) of FIG. 19 has the configuration of FIG. 21, the received signal 1902X corresponds to the combined signal 2106 of FIG. 21, and the control signal 1910 corresponds to the control signal 2100 of FIG. When the configuration of antenna section #Y (1901Y) in FIG. 19 is FIG. 21, received signal 1902Y corresponds to combined signal 2106 in FIG. 21, and control signal 1910 corresponds to control signal 2100 in FIG.
However, the antenna unit #X (1901X) and the antenna unit #Y (1901Y) do not have to have the configuration shown in FIG. 21, and as described above, the antenna unit does not need to input the control signal 1910. Good. The antenna section #X (1901X) and the antenna section #Y (1901Y) may each be one antenna.

The control signal 1900 may be generated based on the information transmitted by the device that is a communication partner, or the device includes an input unit and is generated based on the information input from the input unit. It may be one that has been created.
As described above, according to the transmission method described in the present embodiment, the transmitting apparatus of FIG. 1 transmits the modulated signal, so that the receiving apparatus of FIG. 19 receives the modulated signal transmitted by the transmitting apparatus of FIG. The effect of non-linear distortion can be reduced, and the effect of improving the reception quality of data can be obtained.

The modulation signal system transmitted by the transmitter of FIG. 1 may be a single carrier system modulation signal or a multicarrier system modulation signal such as an OFDM system. A spread spectrum communication method may be applied to the modulated signal.
Then, the control signal 100 of the transmitter of FIG. 1 may include control information for designating “transmission of a single carrier system/transmission of a multicarrier system such as OFDM system”. When the control signal 100 indicates “single carrier system transmission”, the transmitter of FIG. 1 transmits a single carrier system modulated signal, and the control signal 100 indicates “multicarrier system transmission such as OFDM system”. When shown, the transmitter of FIG. 1 will transmit a modulated signal of a multi-carrier system such as an OFDM system. Note that the transmission signal of FIG. 1 is transmitted to the receiving apparatus of FIG. 19 by transmitting control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, The receiving device can receive the modulated signal transmitted by FIG. 1, and can perform demodulation and decoding.

(Embodiment 2)
In the present embodiment, a case where the transmitting apparatus of FIG. Differences from the first embodiment will be described.

In the present embodiment, consider the following three types of transmitting devices.
First transmitter:
It is assumed that the first transmitting device is a transmitting device that can selectively transmit both a modulated signal of a single carrier system and a modulated signal of a multicarrier transmission system such as OFDM system. The control signal 100 of the transmitter of FIG. 1 includes control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, and the control signal 100 is “transmission of single carrier system”. 1 indicates that the transmitter of FIG. 1 transmits a modulated signal of a single carrier system, and the control signal 100 indicates “transmission of a multicarrier system such as an OFDM system”, the transmitter of FIG. Consider a case where a modulated signal of a multi-carrier system such as the OFDM system is transmitted. The transmitter of FIG. 1 transmits control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system” to the receiver of FIG. The receiving device can receive, modulate and demodulate the modulated signal transmitted by the transmitting device of FIG.

Second transmitter:
The second transmitting device is assumed to be a transmitting device capable of transmitting a single carrier modulated signal. When the control signal 100 of the transmitter of FIG. 1 includes control information for specifying “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, the control information is “single carrier system”. Only "Send method" can be selected. Therefore, the transmitter of FIG. 1 transmits a single carrier type modulated signal. The transmitter of FIG. 1 transmits control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system” to the receiver of FIG. The receiving device can receive, modulate and demodulate the modulated signal transmitted by the transmitting device of FIG.

Third transmitter:
The third transmitter is assumed to be a transmitter capable of transmitting a modulated signal of a multi-carrier system such as OFDM system. When the control signal 100 of the transmitter of FIG. 1 includes control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, the control information is “OFMD system”. Only multi-carrier transmission such as "can be selected. Therefore, the transmitter of FIG. 1 transmits a modulated signal of a multi-carrier system such as OFDM system. Note that the transmitting apparatus in FIG. 1 transmits control information for performing “single carrier method transmission/multicarrier method transmission such as OFDM method” to the receiving apparatus in FIG. The receiving device can receive the modulated signal transmitted by the transmitting device of FIG. 1, and can demodulate and decode the modulated signal.

In the first embodiment, the configuration of the transmitting device, the configuration of the receiving device of the receiving device for the modulated signal transmitted by the transmitting device, a frame configuration example in the single carrier system, a frame in the multicarrier transmission system such as OFDM system Since the configuration example has been described, the description is omitted here.
In the present embodiment, as the transmission signal method of the modulated signal in the single carrier system, the “first selection method”, the “second selection method” or the “third selection method” described in the first embodiment is used. 1 is applied, the transmitter of FIG. 1 transmits a modulated signal. At this time, in the second transmission device, the influence of the phase noise of the RF unit and the influence of the nonlinear distortion in the transmission power amplifier can be reduced, and the transmission diversity effect can be obtained depending on the transmission method. By this means, it is possible to obtain the effect of improving the reception quality of data in the receiving device that receives the modulated signal transmitted by the second transmitting device.

Then, in the present embodiment, the following will be considered as a method for transmitting a modulated signal of a multicarrier transmission method such as the OFDM method.
Fourth selection method:
The transmission device of FIG. 1 switches the transmission method of the modulation signal based on the transmission method information included in the control signal 100. At this time, the transmitting apparatus of FIG. 1 can select the following transmitting methods.

Transmission method #4-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #4-2:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #4-3:
A single stream is transmitted (s1(i) is transmitted) (s1(i)) is modulated by 16QAM (or π/2 shift 16QAM) (or 16 in-phase I-quadrature Q planes such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #4-4:
A single stream is transmitted (s1(i) is transmitted) (s1(i)) is a modulation scheme of 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #4-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is BPSK (or π/2 shift BPSK), and the modulation scheme of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #4-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #4-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is QPSK (or π/2 shift QPSK), and the modulation method of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).) (If θ=π/4 radians (45 degrees), the average of modulated signals transmitted from each antenna is assumed. Transmission power becomes equal.)
Transmission method #4-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which 16 signal points are present on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method has 16 signal points on the orthogonal Q plane (may be shifted). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #4-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.
In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by any of the equations (13) to (20).)
Then, based on the control signal 200, the weighting combining unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from the N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the fourth selection method does not have to support all the transmission methods #4-1 to #4-9. For example, in the fourth selection method, one or more transmission methods out of three transmission methods #4-5, transmission method #4-6, and transmission method #4-7 may be supported. . And the 4th transmission method should just correspond to one or more transmission methods among two transmission methods, transmission method #4-8 and transmission method #4-9.

The fourth selection method does not have to correspond to the transmission method #4-1. (In the fourth selection method, the transmission method #4-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The fourth selection method may include transmission methods other than the transmission methods #4-1 to #4-9.
At this time, the following is satisfied.

Transmission method #4-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #4-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #4-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #4-4:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #4-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 2 and 4 or less. It is possible to obtain the effect of transmission diversity.

Transmission method #4-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 16 or less. It is possible to obtain the effect of transmission diversity.
Transmission method #4-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmission diversity.

Transmission method #4-8:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is more than 16 and 256 or less. It is possible to obtain the effect of transmit diversity.
Transmission method #4-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the fourth selection method is used as the selection method of the transmission method when transmitting a modulated signal of a multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting apparatus of FIG. 1 is the “third transmitting apparatus” (or the first transmitting apparatus), when a plurality of modulated signals are transmitted by performing the fourth selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, priority is given to performing precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, a fifth selection method different from the fourth selection method when transmitting a modulated signal of a multi-carrier transmission method such as the OFDM method will be described.

Fifth selection method:
Transmission method #5-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #5-2:
The modulation method of transmitting a single stream (transmitting s1(i)) (of s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #5-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #5-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #5-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #5-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #5-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).) (If θ=π/4 radian (45 degrees), the average of the modulated signals transmitted from each antenna Transmission power becomes equal.)
Transmission method #5-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #5-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the fifth selection method does not have to support all the transmission methods from the transmission method #5-1 to the transmission method #5-9. For example, in the fifth selection method, one or more of the three transmission methods of transmission method #5-5, transmission method #5-6, and transmission method #5-7 may be supported. . Then, the fifth transmission method only needs to support one or more transmission methods out of the two transmission methods #5-8 and #5-9.

The fifth selection method does not have to correspond to the transmission method #4-1. (In the fifth selection method, the transmission method #5-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The fifth selection method may include transmission methods other than the transmission methods #5-1 to #5-9.
At this time, the following is satisfied.

Transmission method #5-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #5-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #5-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #5-4:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #5-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 2 and 4 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #5-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 16 or less. It is possible to obtain the effect of transmit diversity.
Transmission method #5-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #5-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16 or more and 256 or less. It may be possible to obtain the effect of transmission diversity.
Transmission method #5-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the fifth selection method is selected as the transmission method selection method when transmitting a modulated signal of a multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting device of FIG. 1 is the “third transmitting device” (or the first transmitting device), when the plurality of modulated signals are transmitted by performing the fifth selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, priority is given to performing precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, a sixth selection method different from the fourth selection method and the fifth selection method when transmitting a modulated signal of a multi-carrier transmission method such as the OFDM method will be described.

Sixth selection method:
Transmission method #6-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #6-2:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #6-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #6-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #6-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #6-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of equations (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #6-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).) (If θ=π/4 radians (45 degrees), the average of modulated signals transmitted from each antenna is assumed. Transmission power becomes equal.)
Transmission method #6-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #6-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals will be transmitted, the first modulated signal will be transmitted using one or more antennas, and the second modulated signal will be transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.
In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the sixth selection method does not have to support all the transmission methods of the transmission method #6-1 to the transmission method #6-9. For example, in the sixth selection method, one or more transmission methods among three transmission methods of transmission method #6-5, transmission method #6-6, and transmission method #6-7 may be supported. .. The sixth transmission method only needs to correspond to one or more transmission methods out of the two transmission methods #6-8 and #6-9.

Further, the sixth selection method may not correspond to the transmission method #6-1. (In the sixth selection method, the transmission method #6-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The sixth selection method may include transmission methods other than the transmission methods #6-1 to #6-9.
At this time, the following is satisfied.

Transmission method #6-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #6-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #6-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #6-4:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #6-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. There are cases where it is possible to obtain the effect of transmit diversity.

Transmission method #6-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. There are cases where it is possible to obtain the effect of transmit diversity.
Transmission method #6-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #6-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 16 and 256 or less. It is possible to obtain the effect of transmission diversity.
Transmission method #6-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the sixth selection method is used as the selection method of the transmission method when transmitting a modulated signal of a multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting device of FIG. 1 is the “third transmitting device” (or the first transmitting device), when a plurality of modulated signals are transmitted by performing the sixth selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, it is given priority to implement precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, a seventh selection method different from the fourth selection method, the fifth selection method, and the sixth selection method when transmitting a modulated signal of a multicarrier transmission method such as the OFDM method will be described.

Seventh selection method:
Transmission method #7-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #7-2:
The modulation method of transmitting a single stream (transmitting s1(i)) (of s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #7-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #7-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #7-5:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is BPSK (or π/2 shift BPSK), and the modulation method of s2(i) is BPSK. (Or π/2 shift BPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of equations (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #7-6:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is QPSK. (Or π/2 shift QPSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #7-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).) (If θ=π/4 radian (45 degrees), the average of the modulated signals transmitted from each antenna Transmission power becomes equal.)
Transmission method #7-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of equations (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #7-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the seventh selection method does not have to support all the transmission methods from the transmission method #7-1 to the transmission method #7-9. For example, in the seventh selection method, one or more of the three transmission methods, transmission method #7-5, transmission method #7-6, and transmission method #7-7, may be supported. . Then, the seventh transmission method only needs to correspond to one or more transmission methods out of the two transmission methods #7-8 and #7-9.

Further, the seventh selection method may not correspond to the transmission method #7-1. (In the seventh selection method, the transmission method #7-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The seventh selection method may include transmission methods other than the transmission methods #7-1 to #7-9.
At this time, the following is satisfied.

Transmission method #7-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #7-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #7-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #7-4:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #7-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. There are cases where it is possible to obtain the effect of transmit diversity.

Transmission method #7-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. There are cases where it is possible to obtain the effect of transmit diversity.
Transmission method #7-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #7-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16 or more and 256 or less. It may be possible to obtain the effect of transmission diversity.
Transmission method #7-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the seventh selection method is used as the selection method of the transmission method when transmitting the modulated signal of the multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting device of FIG. 1 is the “third transmitting device” (or the first transmitting device), when a plurality of modulated signals are transmitted by performing the seventh selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, it is given priority to implement precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, the eighth selection method different from the fourth selection method, the fifth selection method, the sixth selection method, and the seventh selection method when transmitting a modulated signal of a multicarrier transmission method such as the OFDM method. The selection method will be described.

Eighth selection method:
Transmission method #8-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #8-2:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #8-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #8-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #8-5:
Transmission method #4-5 or transmission method #6-5.

Transmission method #8-6:
Transmission method #4-6 or transmission method #6-6.
Transmission method #8-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is QPSK (or π/2 shift QPSK), and the modulation scheme of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #8-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation scheme of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 16 signal points on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method is such that 16 signal points are present on the orthogonal Q plane (shifting may be performed). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Transmission method #8-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (may be shifted), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian (Note that θ is greater than or equal to 0 radians and less than 2π radians (0 radians≦θ<2π radians).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. . Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Expressions (13) to (20) based on FIGS. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by any of the equations (13) to (20).)
Then, based on the control signal 200, the weighting combining unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from the N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the eighth selection method may not support all the transmission methods #8-1 to #8-9. For example, in the eighth selection method, one or more transmission methods among three transmission methods of transmission method #8-5, transmission method #8-6, and transmission method #8-7 may be supported. .. The eighth transmission method only needs to support one or more transmission methods out of the two transmission methods #8-8 and #8-9.

Also, the eighth selection method may not correspond to the transmission method #8-1. (In the eighth selection method, transmission method #8-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The eighth selection method may include transmission methods other than the transmission methods #8-1 to #8-9.
At this time, the following is satisfied.

Transmission method #8-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #8-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #8-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #8-4:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #8-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. There are cases where it is possible to obtain the effect of transmit diversity.

Transmission method #8-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. There are cases where it is possible to obtain the effect of transmit diversity.
Transmission method #8-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmission diversity.

Transmission method #8-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 16 and 256 or less. It is possible to obtain the effect of transmission diversity.
Transmission method #8-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the eighth selection method is used as the selection method of the transmission method when transmitting a modulated signal of a multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting device of FIG. 1 is the “third transmitting device” (or the first transmitting device), when a plurality of modulated signals are transmitted by performing the eighth selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, it is given priority to implement precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, a fourth selection method, a fifth selection method, a sixth selection method, a seventh selection method, and an eighth selection method when transmitting a modulated signal of a multicarrier transmission method such as the OFDM method A ninth selection method different from that will be described.

9th selection method:
Transmission method #9-1:
The modulation method for transmitting a single stream (transmitting s1(i)) (s1(i)) is BPSK (or π/2 shift BPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #9-2:
The modulation method of transmitting a single stream (transmitting s1(i)) (of s1(i)) is QPSK (or π/2 shift QPSK). (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #9-3:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 16QAM (or π/2 shift 16QAM) (or 16 in the in-phase I-quadrature Q plane such as 16APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #9-4:
The modulation method for transmitting a single stream (transmitting s1(i)) (for s1(i)) is 64QAM (or π/2 shift 64QAM) (or 64 in the in-phase I-quadrature Q plane such as 64APSK). The modulation method (the shift may be applied) in which the signal points of 1) exist. (However, a single stream modulated signal may be transmitted using one antenna or may be transmitted using a plurality of antennas.)
Transmission method #9-5:
Transmission method #4-5 or transmission method #6-5.

Transmission method #9-6:
Transmission method #4-6 or transmission method #6-6.
Transmission method #9-7:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is QPSK (or π/2 shift QPSK), and the modulation method of s2(i) is 16QAM. (Or, π/2 shift 16QAM) (or a modulation method (shifting may be performed) in which 16 signal points exist in the in-phase I-quadrature Q plane such as 16APSK). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Transmission method #9-8:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which 16 signal points are present on the plane (may be shifted), and the modulation method of s2(i) is 16QAM (or π/2 shift 16QAM) (or in-phase I-, such as 16APSK). It is assumed that the modulation method has 16 signal points on the orthogonal Q plane (may be shifted). At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by any of the equations (13) to (20).)
Then, based on the control signal 200, the weighting combining unit 203 of FIGS. 2 and 3 performs precoding using one matrix designated by the control signal 200 from the N matrices of the first matrix to the Nth matrix. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Transmission method #9-9:
Two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-quadrature Q such as 16APSK). A modulation method in which there are 64 signal points on the plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ≠0 radians (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 16APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase may not be changed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).) At this time, in equations (13) to (20), θ=0 radian. (Note that θ is 0 radian or more and less than 2π radian (0 radian≦θ<2π radian).)
Alternatively, two streams are transmitted (s1(i) and s2(i) are transmitted.) The modulation method of s1(i) is 64QAM (or π/2 shift 64QAM) (or in-phase I-, such as 64APSK). A modulation method in which 64 signal points exist in the orthogonal Q plane (shift may be applied), and the modulation method of s2(i) is 64QAM (or π/2 shift 64QAM) (or in-phase such as 64APSK). A modulation method (shifting may be performed) in which there are 64 signal points on the I-orthogonal Q plane is used. At this time, two modulated signals are transmitted, the first modulated signal is transmitted using one or more antennas, and the second modulated signal is transmitted using one or more antennas. .. Then, the two streams are subjected to precoding (weighting synthesis) using one of the (precoding) matrices of Equations (13) to (20) based on FIG. 2 and FIG. The phase is changed (by the change unit 205B) and transmitted. (Note that the phase change may not be performed, and coefficient multiplication may be performed (by the coefficient multiplication units 301A and 302A).)
The precoding process here will be described.

In the transmitter of FIG. 1, a plurality of precoding matrices represented by any one of Expressions (13) to (20) are prepared for precoding processing. For example, N precoding matrices (N is an integer of 2 or more) are prepared as precoding matrices. Here, the N precoding matrices are named “i-th matrix (i is an integer of 1 or more and N or less)”. (The i-th matrix is represented by one of the equations (13) to (20).)
Then, based on the control signal 200, the weighting synthesis unit 203 of FIG. 2 and FIG. Will be applied.

Note that the N number of matrices includes at least one “precoding matrix satisfying any one of the equations (13) to (20) where θ=0”. It is assumed that the matrix includes at least one “precoding matrix satisfying any one of Expressions (13) to (20) where θ≠0”.
Note that the ninth selection method may not support all the transmission methods #9-1 to #9-9. For example, in the ninth selection method, one or more transmission methods among three transmission methods of transmission method #9-5, transmission method #9-6, and transmission method #9-7 may be supported. . And the 9th transmission method should just correspond to one or more transmission methods among two transmission methods, transmission method #9-8 and transmission method #9-9.

Further, the ninth selection method may not correspond to the transmission method #9-1. (In the ninth selection method, the transmission method #9-1 is not included in the transmission method selection candidates of the transmission apparatus in FIG. 1.)
The ninth selection method may include transmission methods other than the transmission methods #9-1 to #9-9.
At this time, the following is satisfied.

Transmission method #9-1:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2.
Transmission method #9-2:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 4.
Transmission method #9-3:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16.
Transmission method #9-4:
The number of signal points in the in-phase I-quadrature Q plane of the transmission signal is 64.
Transmission method #9-5:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 2 or more and 4 or less. There are cases where it is possible to obtain the effect of transmit diversity.

Transmission method #9-6:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 4 or more and 16 or less. There are cases where it is possible to obtain the effect of transmit diversity.
Transmission method #9-7:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is more than 4 and 64 or less. It is possible to obtain the effect of transmit diversity.

Transmission method #9-8:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 16 or more and 256 or less. It may be possible to obtain the effect of transmission diversity.
Transmission method #9-9:
The number of signal points on the in-phase I-quadrature Q plane of the transmission signal is 64 or more and 4096 or less. There may be a case where the effect of transmission diversity can be obtained.

As described above, the selection method of the transmission method when transmitting a modulated signal of the single carrier system and the selection method of the transmission method when transmitting a modulated signal of the multi-carrier system such as OFDM system are different.
The reason why the ninth selection method is used as the selection method of the transmission method when transmitting a modulated signal of a multi-carrier method such as the OFDM method will be described.

As a transmission device for transmitting a modulated signal of a multi-carrier system such as the OFDM system, regardless of the modulation system, the requirement that the influence of the phase noise of the RF unit is small and the influence of the nonlinear distortion of the transmission power amplifier is small. Need to meet. (If this is not satisfied, it is difficult for the receiving device that receives the modulated signal transmitted by the transmitting device to obtain high data reception quality. (Because the transmitting device transmits modulated signals of multiple carriers at the same time, Since the PAPR is large regardless of the modulation method, the above-mentioned requirements are important.))
Therefore, when the transmitting device of FIG. 1 is the “third transmitting device” (or the first transmitting device), when a plurality of modulated signals are transmitted by performing the ninth selection method, In order to increase the possibility that the receiving device can obtain high data reception quality, it is given priority to implement precoding as much as possible.

By performing the above, the modulation transmitted by the transmission device is performed regardless of "the transmission device transmits a modulation signal of a single carrier system or transmits a modulation signal of a multicarrier system such as OFDM system". The receiving device that receives the signal can obtain the effect of being able to obtain higher data reception quality.
Next, application examples of the single-carrier transmission method and the transmission method in the multi-carrier method such as the OFDM method described above will be described.

For example, it is assumed that the standard α exists as a wireless communication method. Further, it is assumed that the standard α is a standard in which a frequency band to be used is determined and one or more frequency bands are set. At this time, it is assumed that the standard α is a standard that allows transmission of modulated signals for both single-carrier transmission and multi-carrier transmission such as OFDM.
Then, as the single-carrier transmission, any one of the “first selection method”, the “second selection method”, and the “third selection method” described in the first embodiment is supported. In addition, as the multi-carrier transmission such as the OFDM method, the “fourth selection method”, the “fifth selection method”, or the “sixth selection method” described in the present embodiment, or , “Seventh selection method”, “eighth selection method”, or “ninth selection method” is supported.

Therefore, based on the descriptions of the "first transmitting device", the "second transmitting device", and the "third transmitting device", the following three types of transmitting devices can be considered.
Fourth transmitter:
It is assumed that the fourth transmitter is a transmitter that can selectively transmit both a standard single-carrier modulated signal and a standard multi-carrier modulated signal such as an OFDM. . The control signal 100 of the transmitter of FIG. 1 includes control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, and the control signal 100 is “transmission of single carrier system”. 1 is transmitted, the transmission apparatus of FIG. The transmitting apparatus of 1 transmits a modulated signal of a multi-carrier method such as an OFDM method of standard α. The transmitter of FIG. 1 transmits control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system” to the receiver of FIG. The receiving device can receive, modulate and demodulate the modulated signal transmitted by the transmitting device of FIG.

Fifth transmitter:
The fifth transmitter is assumed to be a transmitter capable of transmitting a modulated signal of standard α single carrier system. When the control signal 100 of the transmitter of FIG. 1 includes control information for specifying “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, the control information is “single carrier system”. Only "Send method" can be selected. Therefore, the transmitter of FIG. 1 transmits a modulated signal of the standard α single carrier system. The transmitter of FIG. 1 transmits control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system” to the receiver of FIG. The receiving device can receive, modulate and demodulate the modulated signal transmitted by the transmitting device of FIG.

Sixth transmitter:
The sixth transmitter is assumed to be a transmitter capable of transmitting a modulated signal of a multi-carrier method such as the OFDM method of standard α. When the control signal 100 of the transmitter of FIG. 1 includes control information for designating “transmission of single carrier system/transmission of multicarrier system such as OFDM system”, the control information is “OFMD system”. Only multi-carrier transmission such as "can be selected. Therefore, the transmitting apparatus of FIG. 1 transmits a modulated signal of a multi-carrier method such as the standard α OFDM method. Note that the transmitting apparatus in FIG. 1 transmits control information for performing “single carrier method transmission/multicarrier method transmission such as OFDM method” to the receiving apparatus in FIG. The receiving device can receive the modulated signal transmitted by the transmitting device of FIG. 1, and can demodulate and decode the modulated signal.

  In the case where the fourth transmission device supports the standard α, for example, the transmission of the modulation signal of the standard α single carrier system and the transmission of the modulation signal of the multi-carrier transmission system such as the standard α OFDM system are common to the transmission device. If a common transmission power amplifier is used for the RF unit, the RF unit and the transmission power amplifier are set so that the influence of the phase noise and the non-linear distortion is small with respect to the modulation signal of the multi-carrier transmission system such as the standard α OFDM system. Will be used. Therefore, the influence of the phase noise and the non-linear distortion is small even on the modulated signal of the standard α single carrier system. Therefore, even if this transmitting apparatus transmits the standard α single carrier system modulation, Even if a modulation signal of a multi-carrier transmission system such as the OFDM system is used, the receiving device has an effect of being able to obtain high data reception quality.

  As another method, in the fourth transmitter, when transmitting the modulated signal of the standard α single carrier system, the RF unit and the transmission power amplifier for transmitting the modulated signal of the single carrier system are used, and the OFDM of the standard α is used. When transmitting a modulated signal of a multi-carrier transmission system such as the H.264 system, an RF unit and a transmission power amplifier for transmitting the modulated signal of the multi-carrier system such as the OFDM system are used.

  Then, regardless of whether this transmitting device transmits a modulated signal of the standard α single carrier system or a modulated signal of the standard α multi-carrier transmission system such as the OFDM system, the receiving device receives the high data. There is an effect that quality can be obtained. In addition, when this transmitter transmits a modulated signal of the standard α single carrier system, it is possible to use a suitable RF unit and a transmission power amplifier, and thus it is possible to reduce power consumption. ..

  In the fifth transmitter, it is assumed that a standard α single carrier modulation signal is transmitted. At this time, as described in Embodiment 1 and Embodiment 2, in the selection method, the transmission methods that can be transmitted are limited, and thus PAPR can be reduced. Therefore, it is possible to reduce the effects of phase noise and nonlinear distortion, it is possible to obtain the effect of improving the reception quality of data in the receiving device that receives the modulated signal transmitted by the transmitting device, and in the transmitting device, It is possible to obtain the effect that the RF unit and the transmission power amplifier, which have a small circuit scale and consume less power, can be used.

It is assumed that the sixth transmitter transmits a modulated signal of a multi-carrier system such as the standard α OFDM system. At this time, as described in the second embodiment, in the selection method, the transmission methods that can be transmitted are limited, so that the reception quality of data is improved in the reception apparatus that receives the modulated signal transmitted by the transmission apparatus. The effect of improving can be obtained.
As described above, in the standard α that supports both single-carrier transmission and multi-carrier transmission methods such as OFDM system, the transmission method supported by single-carrier transmission and multi-carrier transmission such as OFDM system It is important that there are different parts in the transmission methods supported by the methods. As a result, the effects as described above can be obtained.

The spread spectrum communication method may be applied to the single carrier modulation signal, or the spread spectrum communication method may be applied to the multi carrier modulation signal such as the OFDM method.

(Supplement)
As a matter of course, a plurality of the embodiments described in this specification and other contents may be combined and implemented.

Further, each embodiment is merely an example, and for example, “modulation method, error correction coding method (error correction code to be used, code length, coding rate, etc.), control information, etc.” is illustrated. Also, even when another "modulation method, error correction coding method (error correction code to be used, code length, coding rate, etc.), control information, etc." is applied, the same configuration can be used.
As for the modulation method, the embodiment described in this specification and other contents can be implemented by using a modulation method other than the modulation method described in this specification. For example, APSK (Amplitude Phase Shift Keying) (for example, 16APSK, 64APSK, 128APSK, 256APSK, 1024APSK, 4096APSK, etc.), PAM (Pulse Amplitude Modulation) (for example, 4PAM, 8PAM, 16PAM, 64PAM, 128PAM, 256PAM, 1024PAM, 4096PAM). , PSK (Phase Shift Keying) (for example, BPSK, QPSK, 8PSK, 16PSK, 64PSK, 128PSK, 256PSK, 1024PSK, 4096PSK, etc.), QAM (Quadrature Amplitude Modulation) (for example, 4QAM, 8QAM, 16QAM, 64QAM, 128QAM). , 256QAM, 1024QAM, 4096QAM, etc.) may be applied, and uniform modulation and non-uniform mapping may be used in each modulation method. Also, a signal point arrangement method of 2, 4, 8, 16, 64, 128, 256, 1024, etc. on the IQ plane (2, 4, 8, 16, 16 The modulation method having signal points of 64, 128, 256, 1024, etc.) is not limited to the signal point arrangement method of the modulation method shown in this specification.

  In the present specification, it is conceivable that the transmitting device is equipped with a communication/broadcasting device such as, for example, a broadcasting station, a base station, an access point, a terminal, a mobile phone, or the like. It is conceivable that the receiving device is equipped with a communication device such as a television, a radio, a terminal, a personal computer, a mobile phone, an access point, and a base station. Further, the transmitting device and the receiving device in the present invention are devices having a communication function, and the devices have some interface with a device for executing an application such as a television, a radio, a personal computer, and a mobile phone. It is also conceivable that the form is such that it can be connected after being disconnected. Further, in the present embodiment, symbols other than data symbols, such as pilot symbols (preamble, unique word, postamble, reference symbol, etc.), control information symbols, etc., may be arranged in any frame. Good. Although the symbols are named here as pilot symbols and symbols for control information, any naming method may be used, and the function itself is important.

  The pilot symbols may be, for example, known symbols modulated using PSK modulation at the transceiver (or, by synchronization of the receiver, the receiver may be able to know the symbols transmitted by the transmitter). .), the receiver can use this symbol to perform frequency synchronization, time synchronization, channel estimation (for each modulated signal) (estimation of CSI (Channel State Information)), signal detection, etc. Become.

In addition, the control information symbol is information that needs to be transmitted to a communication partner in order to realize communication other than data (such as an application) (for example, a modulation method, an error correction coding method used in communication, This is a symbol for transmitting the coding rate of the error correction coding system, setting information in the upper layer, etc.).
It should be noted that the present invention is not limited to each embodiment and can be implemented with various modifications. For example, in each of the embodiments, the case of performing it as a communication device has been described, but the present invention is not limited to this, and this communication method can also be performed as software.

Note that, for example, a program that executes the above communication method may be stored in advance in a ROM (Read Only Memory), and the program may be operated by a CPU (Central Processor Unit).
A program for executing the above communication method is stored in a computer-readable storage medium, the program stored in the storage medium is recorded in a RAM (Random Access Memory) of the computer, and the computer is operated in accordance with the program. You may do it.

  Each configuration of each of the above-described embodiments may be realized as an LSI (Large Scale Integration) which is typically an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include all or part of the configurations of the respective embodiments. The name used here is LSI, but it may also be called IC (Integrated Circuit), system LSI, super LSI, or ultra LSI depending on the degree of integration. The method of circuit integration is not limited to LSI, and it may be realized by a dedicated circuit or a general-purpose processor. A field programmable gate array (FPGA) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used. Furthermore, if an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. Biotechnology may be applied.

Further, in the embodiments of the present specification, the description has been given based on the configuration of FIG. 1 as the configuration of the transmission device, but the configuration is not limited to this, and for example, the configuration of FIG. The respective embodiments can be implemented.
In FIG. 22, those that operate in the same manner as in FIG. 1 are given the same numbers, and descriptions of those that operate in the same way as in FIG. 1 are omitted.

22, the difference in operation from FIG. 1 is that error correction coding section 102 outputs coded data 103_1 and 103_2. For example, the error correction coding unit 102 is assumed to code a block code such as an LDPC (low density parity check) code. At this time, the encoded data of the 2n−1th block is output as encoded data 103_1, and the encoded data of the 2nth block is output as encoded data 103_1 (n is an integer of 1 or more). .
Then, mapping section 104 performs mapping of the specified modulation method based on encoded data 103_1, outputs signal 105_1 after mapping, and performs mapping of the specified modulation method based on encoded data 103_2. Then, the signal 105_2 after mapping is output.

Although the embodiment of the present specification has been described with reference to FIG. 2 as the configuration of the signal processing unit 106 of FIGS. 1 and 22, each embodiment has the configuration of FIG. 23 instead of FIG. May be.
In FIG. 23, those that operate in the same manner as in FIG. 2 are assigned the same reference numerals, and descriptions of those that operate in the same manner as in FIG.

23 is different from FIG. 2 in that the phase changing unit 209B of FIG. 2 is not provided in FIG. Therefore, the baseband signal 208A corresponds to the signal 106_A after the signal processing in FIGS. 1 and 22, and the baseband signal 208B corresponds to the signal 106_B after the signal processing in FIGS.
In this specification, even if the specific configuration of the transmission device is different, the same signal as one of the signals 106_A and 106_B after the signal processing described in each embodiment disclosed in this specification is generated, and a plurality of signals are generated. If it is transmitted using the antenna section, the receiving device receives the data symbol that is performing MIMO transmission (transmits a plurality of streams) in the environment where the direct wave is dominant, especially in the LOS environment. It is possible to obtain the effect of improving the reception quality of data in the device. (Other effects described in the present specification can be similarly obtained.)
In addition, in the signal processing unit 106 of FIGS. 1 and 22, a phase changing unit may be provided both before and after the weighting combining unit 203. Specifically, the signal processing unit 106 performs a phase change on the post-mapping signal 201A to generate a post-phase change signal 2801A before the weighting synthesis unit 203, and the post-mapping phase change unit 205A_1. One or both of the phase changing units 205B_1 that perform a phase change on the signal 201B to generate a signal 2801B after the phase change is provided. Further, the signal processing unit 106 performs, prior to the insertion units 207A and 207B, a phase changing unit 205A_2 that performs a phase change on the signal 204A after the weighted combination to generate a signal 206A after the phase changed, and a signal after the weighted combination. One or both of the phase changing units 205B_2 for changing the phase of the signal 204B and generating the signal 206B after the phase change are provided.

  Here, when the signal processing unit 106 includes the phase changing unit 205A_1, one input of the weighting combining unit 203 is the signal 2801A after the phase change, and when the signal processing unit 106 does not include the phase changing unit 205A_1, the weighting combining unit 203 One input is the signal 201A after mapping. When the signal processing unit 106 includes the phase changing unit 205B_1, the other input of the weighting synthesis unit 203 is the phase-changed signal 2801B. When the signal processing unit 106 does not include the phase changing unit 205B_1, the weighting synthesis unit 203 includes The other input is the mapped signal 201B. When the signal processing unit 106 includes the phase changing unit 205A_2, the input of the inserting unit 207A is the signal 206A after the phase changing. When the signal processing unit 106 does not include the phase changing unit 205A_2, the input of the inserting unit 207A is weighted synthesis. This is the later signal 204A. When the signal processing unit 106 includes the phase changing unit 205B_2, the input of the inserting unit 207B is the signal 206B after the phase changing, and when the signal processing unit 106 does not include the phase changing unit 205B_2, the input of the inserting unit 207B is It is the signal 204B after weighted synthesis.

  1 and 22 may include a second signal processing unit that performs different signal processing on the signals 106_A and 106_B after signal processing that are the output of the signal processing unit 106. At this time, assuming that the two signals output by the second signal processing unit are the signal A after the second signal processing and the signal B after the second signal processing, the radio unit 107_A outputs the signal after the second signal processing. Radio section 107_B receives signal A as input and performs predetermined processing, and radio section 107_B receives signal B after the second signal processing as input and performs predetermined processing.

  The signal processing unit 106, prior to the insertion units 207A and 207B, performs a phase change on the signal 204A after the weighted combination to generate the signal 206A after the phase change, and the signal 204B after the weighted combination. When a configuration is provided that includes both the phase changing units 205B_2 that perform the phase changing to generate the signal 206B after the phase changing, the signals 206A (z1(i) after the phase changing inputted to the inserting units 207A and 207B). ), 206B(z2(i)) are, for example, in Equation (3) and Equation (37) to Equation (45).

を、

To

へと置き換える第１の置き換えを行った置き換え後の式のいずれかで表される。式（３）及び式（３７）から式（４５）に対して上述した第１の置き換えを行った置き換え後の式は、本願の明細書において式（３）及び式（３７）から式（４５）のいずれかを用いて説明した全ての構成に対し、その変形例を表す式として適用可能である。

It is represented by one of the expressions after the first replacement. The expressions after the replacement, which is the above-described first replacement of the expressions (3) and (37) to (45), are the expressions (3) and (37) to (45) in the specification of the present application. ) Is applicable to all the configurations described using any one of () as a formula expressing the modified example.

The value A (y _A (i)) of phase change and the value B (y _B (i)) of phase change are y _A (i)=e ^j ×δ ^A(i) and y _B (i)=e, respectively. It can be represented by ^j ×δ ^B(i) . Here, δ _A (i) and δ _B (i) are real numbers. δ _A (i) and δ _B (i) are set so that, for example, the result of performing a remainder operation on δ _A (i)−δ _B (i) by the divisor 2π changes in the cycle N. (N is an integer of 2 or more.) However, the setting of δ _A (i) and δ _B (i) is not limited to this. For example, the phase change value A(y _A (i)) and the phase change value B(y _B (i)) change cyclically or regularly, and the phase change value A and the phase change. _{A method in} which the difference (y _A (i)/y _B (i)) from the change value B changes periodically or regularly may be used.

  The signal processing unit 106 includes a phase changing unit 205A_2 in front of the inserting units 207A and 207B to change the phase of the weighted combined signal 204A to generate the phase changed signal 206A. In the case where the configuration is not provided with both of the phase changing units 205B_2 that change the phase of 204B and generate the signal 206B after the phase change, the signal 206A (z1(z1(z1(z1 i)), and the signal 204B(z2(i)) after weighted synthesis is, for example, in Equation (3) and Equation (37) to Equation (45).

を、

To

へと置き換える第２の置き換えを行った置き換え後の式のいずれかで表される。式（３）及び式（３７）から式（４５）に対して上述した第２の置き換えを行った置き換え後の式は、本願の明細書において式（３）及び式（３７）から式（４５）のいずれかを用いて説明した全ての構成に対し、その変形例を表す式として適用可能である。

It is represented by one of the expressions after the replacement performed by the second replacement. The expressions after the replacement, which is the above-described second replacement of the expressions (3) and (37) to (45), are the expressions (3) and (37) to (45) in the specification of the present application. ) Is applicable to all the configurations described using any one of () as a formula expressing the modified example.

The phase change value y(i) is represented by, for example, the equation (2). However, the setting method of the phase change value y(i) is not limited to the equation (2), and for example, a method of changing the phase periodically or regularly can be considered.
Note that in Embodiment 1, when the modulation scheme of the signal 201A (s1(i)) after mapping is QPSK and the modulation scheme of the signal 201B (s2(i)) after mapping is 16QAM, equation (37) ), the values of u and v in

または、

Or

に設定することで、受信装置が良好なデータの受信品質を得ることができることを説明した。しかし、マッピング後の信号２０１Ａ（ｓ１（ｉ））の変調方式がＱＰＳＫであり、マッピング後の信号２０１Ｂ（ｓ２（ｉ））の変調方式が１６ＱＡＭであるときに受信装置が良好なデータの受信品質を得ることができるｕとｖの値の設定の例は、式（５１）と式（５２）の組み合わせ及び式（５３）と式（５４）の組み合わせに限定されない。

It has been described that the receiving apparatus can obtain good reception quality of data by setting to. However, when the modulation scheme of the signal 201A(s1(i)) after mapping is QPSK and the modulation scheme of the signal 201B(s2(i)) after mapping is 16QAM, the receiving apparatus can obtain good data reception quality. Examples of setting the values of u and v that can obtain ##EQU1## are not limited to the combination of equations (51) and (52) and the combination of equations (53) and (54).

As an example, as the error correction coding system used by the error correction coding unit 102 to generate the coded data 103, the first error correction coding system and the first error correction coding system are code rates or A case where the second error correction coding method in which either one or both of the code lengths is different can be selected will be described. The mapping unit 104 uses the first modulation scheme to generate the mapped signal 201A(s1(i)) and generates the mapped signal 201B(s2(i)) different from the first modulation scheme. 2 modulation method is used. Here, when the signal processing unit 106 uses the first error correction coding method as the error correction coding method and the first modulation method and the second modulation method as the combination of the modulation methods, the equation ( As the values of u and v in 37), u ₁ and v ₁ are used, respectively. Further, when the signal processing unit 106 uses the second error correction coding method as the error correction coding method and uses the first modulation method and the second modulation method as the combination of the modulation methods, the equation (37) ), u ₂ and v ₂ are used as the values of u and v, respectively. At this time, if the ratio of u ₁ and v ₁ is different from the ratio of u ₂ and v _2, as compared with the case where the ratio of u ₁ and v ₁ is equal to the ratio of u ₂ and v _2, good reception apparatus There is a possibility that good reception quality of data can be obtained.

  In the above description, when either or both of the coding rate and the code length of the error correction coding scheme used by the error correction coding unit 102 to generate the coded data 103 are different, the equation (37) ), the case where the ratio of the value of u and the value of v is different is described, but the ratio of the value of u and the value of v is changed based on the condition other than the coding rate or the code length of the error correction coding method. You may let me. For example, the signal processing unit 106 may change the ratio of the value of u to the value of v according to the combination of the modulation methods used as the first modulation method and the second modulation method. As yet another example, the signal processing unit 106 uses the single carrier system even if the error correction coding systems are the same and the combination of the modulation systems used as the first modulation system and the second modulation system is the same. The ratio of the value of u and the value of v may be changed between the case of transmitting the modulated signal and the case of transmitting the modulated signal of the multi-carrier system such as the OFDM system. With this configuration, there is a possibility that the receiving device can obtain good data reception quality.

  The present disclosure can be applied to a wireless communication system using a single carrier method and/or a multicarrier method.

100 control signal 101 data 102 error correction coding unit 103 coded data 104 mapping unit 105_1, 105_2 baseband signal 106 signal processing unit 106_A, 106_B signal processed signal 107_A, 107_B radio unit 108_A, 108_B transmission signal 109_A, 109_B antenna Department

Claims (4)

Transmission method,
A plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) are generated from transmission data, where i is a symbol number that is an integer of 0 or more, and the plurality of first modulated signals s1(i) are generated. 1 modulated signal s1(i) is a signal generated using the QPSK modulation method, and the plurality of second modulated signals s2(i) is a signal generated using 16QAM modulation,
From the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1( that satisfy equations (1) to (4) are obtained. i) and a plurality of second signal processed signals z2(i),

α and β are arbitrary real numbers or imaginary numbers, y(i) is a value of the phase change that changes in the cycle N, and N is an integer of 2 or more,
The plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) are transmitted using a plurality of antennas, and the first signals of the same symbol number are transmitted. The processed signal and the second processed signal are simultaneously transmitted at the same frequency,
How to send. A transmitter,
A plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) are generated from transmission data, where i is a symbol number that is an integer of 0 or more, and the plurality of first modulated signals s1(i) are generated. 1 modulation signal s1(i) is a signal generated using the QPSK modulation method, and the plurality of second modulation signals s2(i) is a signal generated using the 16QAM modulation. ,
From the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1( that satisfy equations (1) to (4) are obtained. i) and a plurality of second signal processed signals z2(i),

α and β are arbitrary real numbers or imaginary numbers, y(i) is a value of the phase change that changes in the cycle N, and N is an integer of 2 or more;
The plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) are transmitted using a plurality of antennas, and the first signals of the same symbol number are transmitted. The signal after processing and the signal after the second signal processing are simultaneously transmitted at the same frequency;
A transmission method comprising. A receiving method,
Acquiring a reception signal obtained by receiving the first transmission signal and the second transmission signal transmitted from different antennas,
For the first transmission signal and the second transmission signal, a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) are used by using a plurality of antennas. Where i is a symbol number that is an integer greater than or equal to 0, and the signal after the first signal processing and the signal after the second signal processing with the same symbol number have the same frequency. Are being sent at the same time,
The plurality of first signal processed signals z1(i) and the plurality of second signal processed signals z2(i) are a plurality of first modulated signals s1 generated using a QPSK modulation method. (I) and a plurality of second modulated signals s2(i) generated using 16QAM modulation, which are signals generated by performing first signal processing, the signals after the plurality of first signal processings. z1(i) and the plurality of second signal-processed signals z2(i) are compared with the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i). Expressions (1) to (4) are satisfied,

α and β are arbitrary real numbers or imaginary numbers, y(i) is a value of the phase change that changes in the period N, and N is an integer of 2 or more,
The received signal is subjected to second signal processing corresponding to the first signal processing and demodulated.
Receiving method.
Belief method. A receiving device,
Acquiring a reception signal obtained by receiving the first transmission signal and the second transmission signal transmitted from different antennas,
For the first transmission signal and the second transmission signal, a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) are used by using a plurality of antennas. Where i is a symbol number that is an integer greater than or equal to 0, and the signal after the first signal processing and the signal after the second signal processing with the same symbol number have the same frequency. Are being sent at the same time,
The plurality of first signal processed signals z1(i) and the plurality of second signal processed signals z2(i) are a plurality of first modulated signals s1 generated using a QPSK modulation method. (I) and a plurality of second modulated signals s2(i) generated using 16QAM modulation, which are signals generated by performing first signal processing, the signals after the plurality of first signal processings. z1(i) and the plurality of second signal-processed signals z2(i) are compared with the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i). Expressions (1) to (4) are satisfied,

α and β are arbitrary real numbers or imaginary numbers, y(i) is a value of the phase change that changes in the cycle N, and N is an integer of 2 or more;
A demodulation unit that performs second signal processing corresponding to the first signal processing on the received signal and demodulates the received signal;
A receiving device comprising.

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