WO2010003271A1

WO2010003271A1 - Transmission apparatus, reception apparatus, transmission method, and reception method

Info

Publication number: WO2010003271A1
Application number: PCT/CN2008/001282
Authority: WO
Inventors: 李栋; 朱孝龙; 杨红卫
Original assignee: 上海贝尔阿尔卡特股份有限公司; 阿尔卡特朗讯
Priority date: 2008-07-07
Filing date: 2008-07-07
Publication date: 2010-01-14
Also published as: CN102067476A; CN102067476B

Abstract

A transmission apparatus, reception apparatus, transmission method, and reception method are disclosed. The transmission apparatus includes: a modulation unit for modulating the signal to be transmitted by constellation, an encoding unit for grouping and double polarized space frequency or space time block encoding the symbols of the modulated signal, and the sign of the elements of the odd rows is opposite to the sign of the elements of the even rows in the block which is implemented double polarized space frequency or space time block encoding, and the elements of the first row and the elements of the third row constitute the code block of space frequency or space time block encoding, a frequency to time converting unit for implementing mapping from time to frequency and frequency to time conversion to the signal which is double polarized space frequency or space time block encoded, and transmitting the converted signal by corresponding antenna. The complexity of the scheme in the embodiment of the invention is lower, the scheme can apply to the actual communication system. And the additional spatial diversity gain can be provided; the robustness of the radio link's application in the high mobility is enhanced further.

Description

Transmitting device, receiving device, and transmitting and receiving method

The present invention relates to the field of mobile communication technologies, and in particular, to a transmitting device, a receiving device, and a transmitting and receiving method, which can maintain a communication connection between two communicating parties when the terminal moves at a high speed. Background technique

Modern communication systems are required to meet high mobility requirements. For example, a mobile terminal equipped by a user on a high-speed mobile vehicle needs to maintain a connection with a base station or a communication partner at all times. In IEEE802.16m and 3GPP LTE, it is necessary to support mobility of about 120 to 350 km/h, and even in the future, in some frequency bands or arrangements, mobility of up to 500 km/h should be satisfied. However, in an OFDM communication system, this mobility introduces a large Doppler shift, which will destroy orthogonality between subcarriers and cause severe inter-carrier interference (ICI). As a result, the performance of the system deteriorates significantly.

In the 髙 mobility application, there are currently two ICI elimination schemes. One is to apply a complex channel equalization technique to the receiver side in order to eliminate the influence of ICI, for example, in Non-Patent Document 1 (Xiaodong C^ Georgios B. Giannakis, Bounding Performance and Suppressing Intercarrier Interference in Wireless Mobile OFDM, IEEE Transactions on Communications, Vol. 51, No. 12, Dec 2003 ) and Kyung Hi Chang, An Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time- Variant Multipath Channels, IEEE Transactions on Communications , Vol. 47, No. 1, Jan 1999). However, due to the high complexity of the equalization technique, it is not flexible in practical applications (although the complexity can be reduced to some extent).

Figure 1 illustrates the application of high complexity equalization techniques in a single antenna communication system. As shown in Fig. 1, on the base station side, the FEC unit 110 performs channel coding on the input information bit sequence, for example, using a channel coding method such as a turbo coding scheme, and outputs a coded bit sequence. Then, the QAM modulation unit 111 constellates the coded bit sequence outputted by the channel coding, for example, with a 16QAM modulation scheme, and outputs a sequence of modulation symbols as a coded data stream. The IDFT unit 112 performs OFDM modulation on the encoded data stream by IDFT transform to generate a time domain signal corresponding to the transmit antenna. The time domain signal is transmitted through the transmitting antenna by an operation such as up-conversion.

In addition, on the mobile device side, the DFT unit 113 performs DFT conversion on the input signal, and takes the signal from the time domain. Convert to the frequency domain. Channel estimation unit 114 then obtains a channel estimate signal, such as a channel matrix from the base station to the mobile device, based on the received training sequence. As described above, in this prior art, the channel equalization unit 115 equalizes the signal using a highly complex channel equalization technique to eliminate the influence of the ICI. Then, the QAM demodulation unit 116 performs QAM demodulation on the equalized symbols, and outputs a soft information sequence of the corresponding bits. The decoding unit 117 performs channel decoding on the bit soft information output from the QAM demodulating unit 116, and outputs the decoded information bit sequence.

The second is to apply the interference cancellation modulation technique to the transmitter side. This modulation technique can cancel the inter-subcarrier interference with low complexity on the receiver side, as in Non-Patent Document 3 (Yuping Zhao, et al, Intercarrier). Interference Self-Cancellation Scheme for OFDM Mobile Communication Systems, IEEE Transactions on Communications, Vol. 49, No. 7, July 2001).

Figure 2 shows the application of ICI cancellation modulation techniques in OFDM systems. As shown in Fig. 2, on the base station side, the FEC unit 211 performs channel coding on the input information bit sequence by, for example, a channel coding method such as a turbo coding scheme, and outputs a coded bit sequence. Then, the QAM modulation unit 212 constellates the coded bit sequence outputted by the channel coding and coding, for example, with a 16QAM modulation scheme, and outputs a sequence of modulation symbols as an encoded data stream. The ICI cancellation modulation unit 213 performs ICI self-cancelling modulation on the modulation symbol stream.

The IDFT unit 214 OFDM-modulates the encoded data stream by IDFT transform to produce a time domain signal corresponding to the transmit antenna. The time domain signal is transmitted through the transmitting antenna by an operation such as up-conversion.

In addition, on the mobile device side, the DFT unit 215 performs DFT conversion on the input signal to convert the signal from the time domain to the frequency domain. Channel estimation unit 216 then obtains a channel estimate signal, such as a channel matrix, based on the received training sequence. As described above, in the prior art, the ICI cancel combining unit 217 performs a cancel combining process on the received data-signal and channel estimation signal to eliminate the influence of the ICI. Then, the QAM demodulating unit 218 performs QAM demodulation on the equalized symbols, and outputs a soft information sequence of the corresponding bits. The decoding unit 219 performs channel decoding on the bit soft information output from the QAM demodulating unit 218, and outputs the decoded information bit sequence.

As described above, in the single-antenna OFDM system, ICI cancellation modulation is performed on the transmitter side, and ICI cancellation demodulation operation is performed on the receiver side, thereby realizing ICI cancellation in the case of high mobility in a simple manner. Although the second solution can eliminate ICI, it can only be applied to a single transmit antenna. For multi-antenna transmission, there is currently no effective solution to eliminate ICI. Summary of the invention

The object of the present invention is to provide a transmitting device, a receiving device, and a transmitting and receiving method, which can pass multiple Antenna technology mitigates the effects of ICI and at the same time increases the robustness of the radio link between the transmitting device and the receiving device.

In an aspect of the invention, a transmitting device having a plurality of antennas is provided, comprising: a modulating unit that performs constellation modulation on a signal to be transmitted; and a coding unit that groups symbols in the modulated signal and performs bipolar Space-space or space-time block coding, in which the symbols of the elements of the odd-numbered lines in the bipolar space-frequency or space-time block-coded code block are opposite to the symbols of the elements of the even-numbered lines, and the first line element and the third line The element constitutes a code block of space-frequency or space-time block coding; and a frequency-time transform unit performs time-frequency mapping on the signal encoded by the bipolar space-frequency or space-time block, and performs frequency-time transform, and transmits the frequency through the corresponding antenna. Time transformed signal.

In another aspect of the present invention, a receiving apparatus is provided, including: a time-frequency transform unit that performs time-frequency transform on a time domain signal from a transmitting device, and outputs a frequency domain signal; a channel estimating unit that estimates from a transmitting device to receiving Channel information of the device; inter-subcarrier interference cancellation combining unit, performing inter-subcarrier interference cancellation combining processing on the received data signal and channel information, wherein the data signal is divided by bipolar space frequency or space time on the transmitting device side Encoding, the symbol of the element of the odd-numbered row in the bipolar space-frequency or space-time block-coded code block is opposite to the sign of the element of the even-numbered row, and the first row element and the third row element constitute the space-frequency block-encoded code And a detecting unit that detects the canceled combined signal by a predetermined detecting method to separate the symbol encoded by the bipolar space-frequency or space-time block.

In still another aspect of the present invention, a transmission method in a device having a plurality of antennas is provided, comprising: performing constellation modulation on a signal to be transmitted; grouping symbols in the modulated signal and performing bipolarity Space-frequency or space-time block coding, in which the symbols of the elements of the odd-numbered lines in the bipolar space-frequency or space-time block-coded code block are opposite to the symbols of the elements of the even-numbered lines, and the first line element and the third line element a code block constituting a space-frequency or space-time block code; and performing time-frequency mapping on the signal subjected to bipolar space-frequency or space-time block coding, and performing frequency-time transform, and transmitting the frequency-time-converted signal through the corresponding antenna.

In still another aspect of the present invention, a method for receiving a signal from a transmitting device is provided, comprising: performing time-frequency transform on a time domain signal from a transmitting device, outputting a frequency domain signal; estimating a channel from the transmitting device to the receiving device Information; performing inter-subcarrier interference cancellation combining processing on the received data signal and channel information, wherein the data signal is coded by bipolar space frequency or space time block on the transmitting device side, bipolar space frequency or space time block The symbols of the elements of the odd rows in the encoded code block are opposite to the symbols of the elements of the even rows and the first row element and the third row element form a code block of space-frequency or space-time block-coded; and a predetermined detection method The signal after the cancellation combining process is detected to separate the symbols encoded by the bipolar space-frequency or space-time block.

The DP-SFBC/DP-STBC-based transmission and reception scheme proposed by the embodiment of the present invention not only provides space division The gain is set to improve the link robustness between the transmitting device and the receiving device, and the impact of ICI is reduced with very low computational complexity. Therefore, the DP-SFBC/DP-STBC-based scheme of the embodiment of the present invention is very suitable for high mobility of future mobile communication systems. DRAWINGS

These and other objects and advantages of the present invention will become more apparent from the detailed description of the accompanying claims <

Figure 2 shows a schematic diagram of another prior art ICI cancellation method;

3 is a schematic structural block diagram of a communication system according to an embodiment of the present invention;

4 is a detailed flowchart illustrating a transmitting method according to an embodiment of the present invention;

FIG. 5 is a detailed flowchart illustrating a receiving method according to an embodiment of the present invention; and

6 is an example of SIR comparison of a communication system with conventional SFBC OFDM according to an embodiment of the present invention. detailed description

A transmitting device, a receiving device, and a transmitting and receiving method according to various embodiments of the present invention will be described below with reference to the accompanying drawings.

In high mobility applications, the most important consideration is not the high data rate, but the communication connection. In order to increase the robustness of the radio link between the transmitting device and the receiving device, a conventional (standard) space-frequency block coding scheme can be considered, which can introduce spatial diversity, thereby improving the radio in the case of high mobility. Link robustness. Here, the transmitting device is, for example, a base station, and the receiving device is, for example, a mobile terminal. Naturally, the transmitting device can also be a mobile terminal, in which case the receiving device is a base station.

However, in the traditional SFBC scheme, the severe subcarrier interference that occurs in the mobility application also greatly reduces the performance of the link. To solve this problem, 'a bipolar SFBC was proposed. The basic idea of this bipolar SFBC is to embed the ICI cancellation modulation scheme in the SFBC coding side. Since this scheme is equivalent to the staggered arrangement of two SFBC coding matrices with opposite symbols, it is called bipolar SFBC.

FIG. 3 shows a schematic structural block diagram of a communication system according to an embodiment of the present invention. In this scheme, there are two transmitting antennas on the transmitting device side and one receiving antenna on the receiving device side. However, this is merely a schematic illustration, and one of ordinary skill in the art can easily extend the above situation to more transmit antennas and more receive antennas. As shown in FIG. 3, a transmitting apparatus according to an embodiment of the present invention includes an FEC unit 310, a QAM modulation unit 311, a DP-SFBC unit 312, a first IDFT unit 313, and a second IDFT unit 314. The specific configuration and operation of the transmitting device will be described in detail below with reference to FIG.

The FEC unit 310 performs channel coding on the input information bit sequence using, for example, a channel coding method such as Turbo coding, and outputs a coded bit sequence (S10). The QAM modulation unit 311 constellates the coded bit sequence of the coded output by, for example, a modulation scheme such as 16QAM or QPSK, and outputs a modulation symbol sequence (S1 l ). The DP-SFBC unit 312 groups (blocks) the modulation symbol sequence and performs bipolar space-frequency block coding (packet coding), that is, DP-SFBC coding, and outputs two coded data streams respectively corresponding to two transmit antennas (S12) . Then, the first IDFT unit 313 performs OFDM modulation on the first encoded data stream by IDFT conversion to generate a time domain signal corresponding to the first transmit antenna, and the second IDCT unit 314 performs IDFT conversion on the second encoded data stream. OFDM modulation produces a time domain signal corresponding to the second transmit antenna. Then, the two transmit antennas transmit the two data stream signals after being processed by digital-to-analog conversion (ADC), upconversion, etc. (for the purpose of clearly describing the present invention, the ADC, the up-conversion module, etc. have been omitted in the block diagram). S13).

The processing of the transmission method of the present invention will be described in detail below with specific examples. For example, QAM modulation unit 311 performs QAM modulation on the input symbols to obtain QAM modulation symbols, such as s _Q , _Sl , s ₂ , ..., s ₁₅ , as inputs to DP-SFBC unit 312. In the DP-SFBC unit 312, two or more adjacent symbols in the QAM modulation symbols described above are encoded as one set, and DP-SFBC coded symbols for the two transmit antennas are output. Unlike the conventional SFBC coding matrix (block), for the symbols so, _Sl , the coding result of the DP-SFBC unit 312 of the embodiment of the present invention is expressed as follows:

Where s _D ' and _S are conjugates of sns, the columns of the coding matrix correspond to two transmit antennas, and the rows of the coding matrix (blocks) correspond to four subcarriers that are physically adjacent. According to the coding matrix, we can see that the first and third lines constitute a conventional SFBC coding matrix (block), that is, the first and third lines correspond exactly to the results encoded by the standard SFBC, and The second and fourth lines are exactly opposite to the symbols of the first and third lines. Naturally, for other symbols s ₂ and s ₃ , s ₄ and s ₅ , ..., 5 ₁₄ and 3 ₁₅ , there are similar coding results.

Then, after the time-frequency resource mapping, the first IDFT unit 313 and the second IDFT unit 314 corresponding to the transmitting antenna 1 and the transmitting antenna 2 respectively perform IDFT conversion on the above-mentioned encoding result, and the signal is changed. Switch to the time domain, and then through digital-to-analog conversion, up-conversion and other processing (not shown) and then transmit through two antennas.

As shown in FIG. 3, a receiving apparatus according to an embodiment of the present invention includes: a DFT unit 315, a channel estimating unit 316, an ICI cancel combining unit 317, a detecting unit 318, a QAM demodulating unit 319, and a decoding unit 320. The specific configuration and operation of the receiving device will be described in detail below with reference to FIG.

First, the receiving antenna receives the radio frequency signal, and then performs processing such as low noise amplification, down conversion, synchronization, etc. (not shown), and outputs the received signal as an input signal of the DFT unit 135. Then, the DFT unit 315 performs DFT conversion on the input signal, and shifts to the frequency domain (S20). The channel estimating unit 316 obtains channel estimation information such as a channel matrix (S21) based on the received training sequence, for example. The ICI cancel combining unit 317 performs a cancel combining process on the received data signal and the channel estimation signal (S22).

The detecting unit 318 performs SFBC detection on the canceled combined data signal and the channel estimation signal, and outputs the detected modulation symbol estimate (S23).

The QAM demodulating unit 319 performs QAM demodulation on the symbols output from the detecting unit 318, and outputs a soft information sequence of the corresponding bits (S24). Next, the decoding unit 320 performs new decoding on the bit soft information output from the QAM demodulating unit 318, and outputs the decoded information bit sequence (S25).

Specifically, on the receiving device side, after OFDM demodulation by the DFT unit 315, the detection of the DP-SFBC is performed in two steps. In the first step, the ICI cancellation demodulation unit 317 performs ICI cancellation combining to eliminate the effects of the ICI. In the second step, at detection unit 318, maximum similarity detection is performed to separate the two symbols associated with DP-SFBC coding.

The detection procedures of ICI cancellation combining processing and DP-SFBC encoding described below are mainly performed for four adjacent subcarriers involved in DP-SFBC encoding. In addition, it is assumed that the channel is quasi-static in the frequency domain, that is, the channel change is block-based, and the channel remains substantially constant within the blocks of the four subcarriers. This is required for simple ML detection, but it should be noted that the present invention is not limited to quasi-static situations. For radio channels with greater frequency selectivity, the solution of the embodiments of the present invention can use MMSE detection instead of ML detection. .

For example, the signals received on the first and second subcarriers can be expressed as follows - y ₀ = ∑ H χ (S _ll2 χ - p(l + 1)) + s; _/2+l x ρ{1 + 3) — pl + 2)))

/=0

'- ^k ... (2)

+∑ _i x (5- _//2+1 x (p(l) - p{l + 1)) + S; _n x {p( + 2) - p{l + 3))) + " ₀

/=0

l=Ak Nl

^. =∑ H _W4 x (S x (p(l_1)— p{l)) + 5; _/2+1 x {p{l + 2)— p(l + 1)))

/=0

N-)

+∑ H _2J , ₄ x (S _l/2+] x (p(l - 1) _ p(l)) + S; _/2 x (p(l + 1) - p(l + 2))) + ",

/=4A Here, H _m>k represents the channel coefficient between the transmitting antennas m-1 on the kth subcarrier (note that each block contains 4 subcarriers). The sequence p(l) is defined as an ICI coefficient with a subcarrier offset of /, expressed as follows

Where f denotes the frequency offset value normalized by the carrier spacing (e.g., Doppler shift due to mobility).

For the symbols so and _S1 , the ICI cancellation combining operation can be performed by using the above equations (2) and (3), that is, adding yo and negative, as follows:

W - 1

0 =∑ H _W4 x (S _l/2 x (2/7(7) - p(l + 1) - p(l - 1)) + 5; _/2+1 x (p(l + 3) + p(l + 1) - 2p(l + 2)))

/=0

l=Ak

+∑ H _Wi x (S _l/2+] x (2p(l)― p{l + 1)— p{l― 1)) + S x (2p(l + 2)— p( + 3) - p{l + 1))) + ".-",

/=0

... (5)

It can be seen from the formula (5) that the ICI coefficient of the DP-SFBC of the present invention can be expressed as -q(l) = 2p{l) - p{l - \) - p{l + \) ... (6) And the power ratio of the signal to the ICI interference can be expressed as -

As a reference, the ICI coefficient of the conventional SFBC is as shown in the formula (4), and the power ratio of the signal to the ICI interference can be expressed as follows:

FIG. 6 compares the power ratio of the signal of the DP-SFBC and the conventional SFBC to the ICI interference. As can be seen from FIG. 6, the DP-SFBC proposed by the embodiment of the present invention improves the signal and ICI by about 15 dB compared with the conventional SFBC. The power ratio of the interference, therefore, can greatly improve system performance. The above formula (5) can also be expressed as:

Yo =3⁄4x H _l0 x (2p(0) - p(l) -/7(-1)) + 5,x H ₂₀ x (2p(0) - p(l) - p(-\)) + w _{

= S ₀ H _l0 +S _l xH ₂₀ + w _i

'. (9)

Where wo contains the noise in equation (5) above and all ICI terms. =H,,. x (2/7(0)

I-1, 2, represents the equivalent channel coefficient, which can be obtained by self-cancelling and combining the channel estimation results.

Similarly, the received symbols on the third carrier after the ICI cancellation combining are expressed as follows

Yi = S x H _{l 0} x (2p(0) - p(\) - p(- 1) + 5; x Η _2β χ (2 (0) - ρ(\) - ρ(-\)) + w ,

... (10)

Based on the above equations (9) and (10), ML detection for S _Q and can be performed based on the following maximum ratio combining:

...(11)

Where _y. And the results after the self-cancellation merge are shown as equations (9) and (10), respectively.

^,, ο = ^,, ο X ( ² (0) - C ¹ ) - i" ¹ )) > i = l, 2, ..., represents the equivalent channel estimation obtained by self-cancelling the channel estimation results Δ represents the combined gain, expressed as follows:

Compared with the ICI cancellation scheme based on high complexity channel equalization, the solution proposed by the embodiment of the present invention has lower complexity, which can be flexibly applied to an actual communication system. Compared with the scheme using ICI cancellation modulation technology, the proposed new scheme can provide additional spatial diversity gain, which further improves the robustness of the radio link in high mobility applications.

【Variants】

Although the method and apparatus of the embodiments of the present invention have been described above by taking two antennas and bipolar space frequency block coding as an example, those skilled in the art will extend the case to more transmit antennas and bipolar. Space Time Block Coding (DP-STBC) case. For example, in the case of bipolar space-time block coding, each row pair in each bipolar space-time coding block is associated with an adjacent plurality of time domain symbols, and two rows in each row pair are physically Two adjacent subcarriers are associated, and the first and third rows in equation (1) constitute a standard (conventional) STBC encoded code block.

Although the above describes the configuration and functions of the communication system of the embodiment of the present invention in the form of functional modules, However, this is not meant to limit the invention to the above forms. One of ordinary skill in the art can combine one or more of the modules, or implement the functions of one of the modules in two or more modules.

In addition, the functional modules in the above communication system may be implemented by software, may be implemented by hardware, or may be implemented by software and hardware.

Various specific implementations or changes can be made to the above described without departing from the spirit and essence of the invention. The above-described embodiments are intended to illustrate the invention, and are not intended to limit the scope of the invention. The scope of the invention is defined by the appended claims rather than the embodiments. Various modifications made within the meaning and range of the claims of the invention are considered to be within the scope of the invention.

Claims

1. A transmitting device having a plurality of antennas, comprising: a modulating unit for performing constellation modulation on a signal to be transmitted;

a coding unit, which groups the symbols in the modulated signal and performs bipolar space-frequency or space-time block coding, where the symbols of the elements of the odd-numbered lines in the bipolar space-frequency or space-time block-coded code block are The symbols of the elements of the even rows are opposite, and the first row element and the third row element constitute a code block of space frequency or space time block coding; and the frequency time transform unit encodes the signal subjected to bipolar space frequency or space time block coding. Frequency-weighted after time-frequency mapping

Time-shifting, transmitting a frequency-shifted signal through a corresponding antenna.

2. The transmitting device of claim 1, wherein the rows in each bipolar space frequency coding block are associated with a plurality of physically adjacent subcarriers.

3. The transmitting device of claim 1, wherein each row pair and each of the bipolar space time coding blocks

Adjacent multiple time domain symbols are associated, and two of each row pair are associated with physically adjacent two subcarriers.

4. The transmitting device according to claim 1, wherein the transmitting device is a base station or a mobile terminal.

5. A receiving device, comprising:

a time-frequency transform unit that performs time-frequency transform on a time domain signal from the transmitting device to output a frequency domain signal; and a channel estimating unit that estimates channel information from the transmitting device to the receiving device;

Inter-subcarrier interference cancellation combining unit, performing inter-subcarrier interference cancellation combining processing on the received data signal and channel information, wherein the data signal is encoded by bipolar space frequency or space pair block on the transmitting device side, bipolar The symbols of the elements of the odd-numbered rows in the coded block of the spatial space-time or space-time block are opposite to the symbols of the elements of the even-numbered rows, and the first row element and the third row element form a code block of the space-frequency or space-time block-encoded code block. ; as well as

The detecting unit detects the canceled combined signal by a predetermined detecting method to separate the symbols encoded by the bipolar space-frequency or space-time block.

6. The receiving device according to claim 5, wherein the detection algorithm comprises one of a maximum similarity detection algorithm and a minimum mean square error algorithm.

7. The receiving device according to claim 5, wherein the inter-subcarrier interference cancellation combining unit subtracts signals received on adjacent subcarriers to eliminate inter-subcarrier interference.

8. The receiving device according to claim 5, wherein the inter-subcarrier interference cancellation combining unit performs subcarrier interference cancellation combining processing between a plurality of subcarriers associated with bipolar space frequency or space time block coding.

9. The receiving device according to claim 5, wherein the receiving device is a mobile terminal or a base station.

10. A method of transmitting in a device having multiple antennas, comprising:

Constellation modulation of the signal to be transmitted;

The symbols in the modulated signal are grouped and subjected to bipolar space-frequency or space-time block coding, wherein the symbols of the elements of the odd-numbered lines in the bipolar space-frequency or space-time block-coded code block and the even-numbered lines The elements have opposite signs, and the first row element and the third row element form a space-frequency or space-time block coded code block;

The time-frequency mapping of the signals encoded by the bipolar space-frequency or space-time block is subjected to frequency-time transform, and the frequency-transformed signal is transmitted through the corresponding antenna.

The transmission method according to claim 10, wherein each of the bipolar space-frequency or space-time coding blocks is associated with a plurality of physically adjacent subcarriers.

12. The transmitting method according to claim 10, wherein each row pair in each bipolar space time coding block is associated with adjacent plurality of time domain symbols, and two rows in each row pair are physically Two adjacent subcarriers are associated.

13. A method of receiving a signal from a transmitting device, comprising:

Performing time-frequency transform on the time domain signal from the transmitting device, and outputting the frequency domain signal;

Estimating channel information from the transmitting device to the receiving device;

Performing inter-subcarrier interference cancellation combining processing on the received data signal and channel information, wherein the data signal is coded by bipolar space frequency or space time block coding on the transmitting device side, and bipolar space frequency or space time block coding The symbols of the elements of the odd rows in the code block are opposite to the symbols of the elements of the even rows and the first row element and the third row element form a space-frequency or space-time block-coded code block;

The canceled merged signal is detected by a predetermined detection method to separate the symbols that have been subjected to bipolar space or space time block coding.

The receiving method according to claim 13, wherein the detecting algorithm comprises one of a maximum similarity detecting algorithm and a minimum mean square error algorithm.

The receiving method according to claim 13, wherein the signals received on adjacent subcarriers are subtracted to cancel inter-subcarrier interference.

The receiving method according to claim 13, wherein the subcarrier interference cancellation combining processing is performed between a plurality of subcarriers associated with bipolar space frequency or space time block coding.