JP2003229829A - Radio communication system, multicarrier radio communicating method, transmitter and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably correct phase rotation and amplitude change in each subcarrier in multicarrier communication. <P>SOLUTION: Interpolation pilot carriers for interpolating a plurality of pilot carriers is arranged between the plurality of pilot carriers, and data are transmitted through the interpolation pilot carriers and data carriers. A receiving side respectively detects phase rotation quantity and amplitude change quantity about the pilot carriers and the interpolation pilot carriers, and calculates a phase correction value and an amplitude correction value for the interpolation pilot carriers and the data carriers by interpolating the phase rotation quantity and the amplitude change quantity. Appropriate phase and amplitude correction corresponding to a transmission path characteristic change in each subcarrier can be performed by using the correction values to correct the phases and amplitude of the interpolation pilot carriers and the data carriers. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

The present invention relates to a wireless communication system,
The present invention relates to a multicarrier wireless communication method, a transmission device, and a reception device, for example, OFDM (Orthogonal Frequency Divisio).
It is suitable for application to a wireless communication system using an n multiplexing) method.

[0002]

2. Description of the Related Art In recent years, a wireless communication system using the OFDM system has been put into practical use. The OFDM method is a kind of multi-carrier modulation method, and divides the allocated frequency band into a large number of subcarriers which are adjacent to each other and are orthogonal to each other. In the OFDM method, on the transmission side, data to be transmitted is assigned to each subcarrier by serial-parallel conversion and divided, and each is divided into, for example, 16QAM (Quadrature
mplitude Moduration) to generate a plurality of subcarrier signals. Then, an inverse Fourier transform process is performed on the subcarrier signal to perform frequency-time conversion and synthesis, further D / A conversion and frequency conversion, and transmit as an OFDM signal.

On the other hand, on the receiving side, the received OFDM signal is frequency-converted and A / D-converted, and then Fourier-transformed to perform time-frequency conversion to reproduce a subcarrier signal. Then, each subcarrier signal is demodulated by the same modulation method as at the time of transmission, then parallel-serial converted and combined to reproduce the data to be transmitted.

As described above, in the OFDM system,
Since data is assigned to a large number of subcarriers for transmission, the data transmission rate of each subcarrier becomes low, so that it is less susceptible to delay waves due to multipath, etc., and adjacent subcarriers are made orthogonal to each other. Since the frequency arrangement of the subcarriers is determined, it is possible to arrange a large number of subcarriers within the allocated frequency band, which has the advantage that the frequency utilization efficiency can be improved.

[0005]

In such an OFDM system, 16QAM or 64Q is used as a subcarrier modulation system.
When a multi-level amplitude phase modulation method such as AM is used, if the phase rotation or amplitude change for each subcarrier is large, the error rate of data after demodulation deteriorates. This phase rotation and amplitude change differ for each subcarrier depending on the radio wave propagation environment. FIG. 6 shows an example of transmission path characteristics (amplitude change amount of I component and Q component for each subcarrier) in a multipath environment.

For this reason, in the OFDM system, a part of the subcarriers is defined as a pilot reference serving as a correction reference, and another subcarrier for data transmission (hereinafter referred to as a data carrier) based on the reception result of the pilot carrier. ) Is to correct the phase and amplitude.

For example, in the case of a wireless LAN system called HiperLAN / 2, as shown in FIG.
The 625 [MHz] band is divided into 52 subcarriers,
Of these, 4 are assigned to pilot carriers and the remaining 48 are assigned to data carriers.
Data transmission is carried out via a book data carrier.

In this HiperLAN / 2, the data carrier is 16QAM modulated, while the pilot carrier is BPSK (Binary Phase Shift Keying).
It is modulated by the two-phase phase modulation method. Then, on the receiving side, the phase and amplitude correction values are calculated for each pilot carrier, and the correction values for each data carrier are obtained by, for example, linearly interpolating the correction values for each pilot carrier, and this correction value is used for each data. The phase rotation and amplitude change of the carrier are corrected.

However, in such a subcarrier correction method, when the phase or amplitude of each subcarrier fluctuates irregularly as in the transmission line characteristic shown in FIG. There is a problem that the phase rotation and amplitude change of the data carrier may not be properly corrected.

As a method of solving such a problem, it is conceivable to increase the number of pilot carriers to more appropriately correct each data carrier. In this case, the number of data carriers decreases as the number of pilot carriers increases. However, this causes a problem that the theoretical transmission data rate of the entire system is reduced.

The present invention has been made in consideration of the above points, and provides a wireless communication system, a multicarrier wireless communication method, a transmitting device and a receiving device capable of surely correcting the phase rotation and the amplitude change for each subcarrier. It is a proposal.

[0012]

In order to solve the above problems, the present invention provides a multi-carrier modulation type wireless communication system for transmitting data between a transmitting device and a receiving device through a plurality of subcarriers, The transmitter is
Some of the plurality of subcarriers are modulated as a plurality of pilot carriers to be used as a reference of phase and amplitude, and the other part of the plurality of subcarriers are interpolated with the pilot carriers. With a phase modulation method as a plurality of interpolation pilot carriers for transmitting data, the remaining subcarriers are modulated as a plurality of data carriers for transmitting data, and a plurality of data carriers and interpolation pilot carriers A subcarrier modulation means for modulating
A receiving device is provided with a multicarrier modulation means for combining a plurality of pilot carriers, an interpolated pilot carrier and a data carrier by inverse Fourier transform to generate a multicarrier modulation signal, and a signal transmission means for transmitting the multicarrier modulation signal. Is a signal receiving means for receiving a multi-carrier modulated signal, and a Fourier transform of the received multi-carrier modulated signal, a plurality of pilot carriers, an interpolating pilot carrier, a multi-carrier demodulating means for separating into a data carrier, Phase detection for detecting the amount of phase rotation and amplitude change for each of a plurality of pilot carriers and interpolated pilot carriers
Amplitude detection means and correction for calculating phase correction values and amplitude correction values for a plurality of interpolation pilot carriers and data carriers based on the detected phase rotation amount and amplitude change amount for each of the plurality of pilot carriers and interpolation pilot carriers A value calculation unit, a correction unit that corrects the phases and amplitudes of a plurality of interpolation pilot carriers and data carriers based on the calculated phase correction value and amplitude correction value, and a plurality of interpolations whose phases and amplitudes have been corrected by the correction unit. A subcarrier demodulation means for demodulating data from the pilot carrier and the data carrier is provided.

An interpolated pilot carrier for interpolating the pilot carrier and transmitting data is arranged between a plurality of pilot carriers for use as a reference of phase and amplitude, and at the time of reception, a phase for each pilot carrier By using the rotation amount and the amplitude change amount and the phase rotation amount and the amplitude change amount for each interpolation pilot carrier to calculate the phase correction value and the amplitude correction value for each data carrier, transmission for each subcarrier is performed. It is possible to obtain appropriate phase correction value and amplitude correction value that respond well to changes in the path characteristics, further improve the phase and amplitude correction accuracy, reduce transmission errors, and improve the transmission data rate of the entire system. .

Further, since the data is transmitted via the interpolation pilot carrier together with the data carrier, it is possible to minimize the decrease in the transmission data rate due to the provision of the interpolation pilot carrier.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an OFDM type wireless communication system to which the present invention is applied as a whole, and it is composed of a transmitter 2 and a receiver 3.

The serial-parallel converter 10 of the transmitter 2 allocates the error-encoded transmission data input from the outside to a plurality of subcarriers and divides the divided data, and performs frequency interleaving to generate a plurality of subcarrier signals. It is generated and supplied to the modulator 11.

Here, in this radio communication system 1, as shown in the subcarrier arrangement diagram of FIG. 2, four pilot carriers are arranged at the same positions as in the conventional subcarrier arrangement (FIG. 7), and each pilot carrier is arranged. The fourth subcarrier on both sides of the carrier is defined as a data pilot carrier as an interpolation pilot carrier, which is a feature of the present invention. As a result, in the subcarrier arrangement of the present invention, eight data pilot carriers are arranged almost uniformly among four pilot carriers. The number of data carriers is 40.

The data carrier and the pilot carrier are respectively 16QAM modulation and BPS as in the conventional example.
The data pilot carrier is Q modulated while the data pilot carrier is Q modulated.
Phase modulation is performed by a PSK (Quadrature Phase Shift Keying) method. Then, in this wireless communication system 1, data is transmitted via a data pilot carrier in addition to the data carrier.

That is, the serial-parallel converter 10 divides the transmission data into eight data pilot carrier signals and 40 data carrier signals. Then, the modulation section 11 as a subcarrier modulation means QPSK-modulates the data pilot carrier signal and outputs the data carrier signal to 1
6QAM modulation and IFFT (Inverted Fast Fourier Transf) with pilot carrier signal (BPSK modulation)
orm: inverse fast Fourier transform) unit 12

IFFT as multi-carrier modulation means
The unit 12 performs frequency-time conversion and synthesis by performing an inverse Fourier transform on the input 52 subcarrier signals, and I
It is supplied to the transmission unit 13 as an OFDM signal composed of a component and a Q component. The transmitter 13 performs digital / analog conversion, quadrature modulation, and frequency conversion on the OFDM signal,
It transmits via the antenna 14.

On the other hand, in the receiving device 3, the antenna 21
The OFDM signal received via the receiver is subjected to frequency conversion, quadrature demodulation, and analog / digital conversion in the reception unit 22 to reproduce the I component and the Q component, and supplies the I component and the Q component to the FFT unit 23. At this time, the receiving unit 22 detects the preamble attached to the OFDM signal, corrects the frequency offset of the OFDM signal based on the preamble, and also generates the FFT timing signal that is the reference of the FFT processing, and the FFT unit 23.
Supply to.

The FFT section 23 as a multi-carrier demodulation means performs time-frequency conversion by performing Fourier transform on the input OFDM signal consisting of I component and Q component to generate 52 modulated subcarrier signals, This is supplied to the demodulation unit 24.

The demodulation unit 24 calculates correction values of phase and amplitude for each subcarrier based on the four pilot carrier signals and the eight data pilot carrier signals, and uses the correction values to calculate the data carrier signal and the data. Demodulate the pilot carrier signal.

That is, the 52 subcarrier signals input to the demodulation unit 24 are input to the amplitude / phase corrector 25, and four pilot carrier signals thereof are input to the pilot carrier detector 26, and The eight data pilot carrier signals are input to the data pilot carrier detector 27.

A pilot carrier detector 26 as a phase / amplitude detecting means detects a phase rotation amount and an amplitude change amount for each of the four BPSK-modulated pilot carrier signals, and both are detected by a correction value calculator 28. In addition to the supply, the phase rotation amount is supplied to the data pilot carrier detector 27.

Similarly, the data pilot carrier detector 27 as the phase / amplitude detecting means detects the amount of phase rotation and the amount of amplitude change for each of the eight QPSK-modulated data pilot carrier signals. Since the QPSK signal has a constant amplitude and only the phase changes into four values, the amount of change in the amplitude of the data pilot carrier signal can be easily detected.

However, regarding the amount of phase rotation, QPSK
Since the phase of the signal changes into four values depending on the data, the phase rotation amount cannot be detected by the data pilot carrier signal alone. However, since the approximate amount of phase rotation can be estimated based on the phase correction value for the nearby pilot carrier signals, the amount of phase rotation of each data pilot carrier signal can be detected based on this.

For example, a received symbol as shown in FIG. 3 (A) is obtained in a certain pilot carrier, and FIG.
It is assumed that the received symbol as shown in (B) is obtained. Since the pilot carrier is BPSK modulated,
This received symbol can be determined to be a 0 ° symbol whose phase has been rotated by θ °. On the other hand, in the data pilot carrier, this received symbol is symbol A
Is a phase rotated by α ° or the symbol B is phase rotated by β °.

Here, since the phase rotation amount of the pilot carrier in the vicinity of the data pilot carrier is θ °, if the received symbol of the data pilot carrier is rotated by −θ °, the received symbol will be symbol A. Approach. As a result, it can be estimated that the received symbol of the data pilot carrier is the symbol A whose phase is rotated by α °. The data pilot carrier detector 27 thus calculates the phase rotation amount for each data pilot carrier signal and supplies it to the correction value calculator 28 together with the amplitude change amount.

The correction value calculator 28 calculates the phase correction value and amplitude correction value for each data pilot carrier signal and data carrier signal based on the phase rotation amount and amplitude change amount for each pilot carrier signal and data pilot carrier signal. , For example, by linear interpolation. In the case of the subcarrier arrangement shown in FIG. 2, since the pilot carrier and the data pilot carrier are separated by four carriers, the correction value of the data carrier between them can be easily obtained by bit shifting.

Then, the phase / amplitude corrector 25 corrects the phase and amplitude of the data carrier signal and the data pilot carrier signal by using the phase correction value and the amplitude correction value supplied from the correction value calculator 28, and de-mapping unit To 29. The demapping unit 29 as a subcarrier demodulation unit demodulates the corrected symbols of the data carrier signal and the data pilot carrier signal by demapping according to the respective modulation schemes, demodulates them, and outputs them to the parallel-serial conversion unit 30. . The parallel-serial converter 30 frequency-deinterleaves the demodulated data carrier signal and the data pilot carrier signal and then synthesizes them to reproduce the transmission data. This transmission data is error-corrected by an error corrector (not shown) in the subsequent stage.

In the above configuration, the transmitter 2 of the radio communication system 1 performs BPSK modulation of 4 pilot carriers out of 52 subcarriers and data of 4th subcarriers on both sides of each pilot carrier. QPSK modulation as a pilot carrier and the remaining 4
16QAM modulation is performed on 0 data carriers. Then, the transmission device 2 uses 8 data pilot carriers and 40 data pilot carriers.
Send data via the book's data carrier.

On the other hand, the pilot carrier detector 26 of the receiving apparatus 3 detects the amount of phase rotation and the amount of amplitude change of each of the four received pilot carriers.

Further, the data pilot carrier detector 27 of the receiving apparatus 3 detects the amplitude change amount of each of the eight received data pilot carriers, and also refers to the phase rotation amount of the neighboring pilot carriers to refer to each data pilot carrier. The amount of phase rotation of the data pilot carrier is estimated, and the amount of phase rotation for each data pilot carrier is detected based on the estimation result.

The correction value calculator 28 of the receiving apparatus 3 linearly interpolates the phase rotation amount and the amplitude change amount for the four pilot carriers and the eight data pilot carriers thus obtained, thereby A phase correction value and an amplitude correction value for the data pilot carrier and the data carrier signal are calculated. As a result, in this wireless communication system 1, more appropriate phase correction value and amplitude correction value can be obtained as compared with the conventional method using only pilot carriers.

FIG. 4 shows an example of an amplitude change amount for the I component of each subcarrier and an amplitude correction value for it, as compared with a correction value based on only a pilot carrier (shown by a chain line) by the conventional method. It can be seen that the correction value (shown by the solid line) based on the pilot carrier and the data pilot carrier according to (4) closely follows the amplitude change of each data carrier.

Then, the receiving apparatus 3 corrects the phase and amplitude of the data carrier and the data pilot carrier using the phase correction value and the amplitude correction value calculated in this way, thereby correcting the phase and amplitude as compared with the conventional case. The accuracy can be further enhanced, which reduces transmission errors and improves the transmission data rate of the entire system.

Here, the QPSK modulation used for the data pilot carrier can transmit data of 2 [bit] per symbol, while the 16QAM modulation used for the data carrier transmits data of 4 [bit] per symbol. Can be transmitted. Therefore, by using eight subcarriers as data pilot carriers, the transmission data rate of the entire system theoretically decreases as compared with the conventional example.

For example, the error coding rate of the transmission data is R =
Assuming that the transmission data rate is 3/4, the transmission data rate per OFDM symbol according to the conventional subcarrier arrangement (48 data carriers) shown in FIG. 7 is 16QAM × 48 → 4 [bit / symbol] × 3/4 × 48. [Book] = 144 [bit / OFDM symbol].

On the other hand, the transmission data rate according to the subcarrier arrangement of the present invention (40 data carriers, 8 data subcarriers) shown in FIG. 2 is 16QAM × 40 → 4 [bit / symbol] × 3 / 4 × 40 [lines] = 120 [bit / OFDM symbol] QPSK × 8 lines → 2 [bit / symbol] × 3/4 × 8 [lines] = 12 [bit / OFDM symbol], for a total of 132 [bit / OFDM Symbol].

As a result, the transmission data rate according to the subcarrier arrangement of the present invention is reduced by about 8% as compared with the conventional example. However, if the transmission error after error correction can be reduced by using the pilot carrier and the data pilot carrier together to calculate an appropriate correction value, the transmission data rate can be improved as a whole.

According to the above configuration, a part of the subcarriers used for data transmission is defined as a data pilot carrier, QPSK modulated, data is transmitted via the data carrier and the data pilot carrier, and at the time of reception, the pilot is used. By calculating the correction value for each data carrier using the amount of phase rotation and amplitude change for the carrier and the amount of phase rotation and amplitude change for the data pilot carrier,
It is possible to obtain appropriate phase and amplitude correction values that respond well to changes in transmission line characteristics for each subcarrier, further improve phase and amplitude correction accuracy, reduce transmission errors, and improve the transmission data rate of the entire system. can do.

In the above-described embodiment, the data pilot carriers are arranged on the fourth subcarriers on both sides of each pilot carrier, but the present invention is not limited to this, and various other types may be used depending on the transmission path characteristics and the like. Subcarrier placement may be used.

The subcarrier arrangement example shown in FIG. 5 corresponds to a situation in which the characteristics near the center of the band are flat and the characteristics at both ends of the band vary in the reception of reference symbols included in the synchronization burst. Data pilot carriers are concentrated in the area.

Further, a plurality of subcarrier arrangements are defined in advance in the radio communication system, the transmitting apparatus selects a subcarrier arrangement suitable for the transmission path characteristic to generate an OFDM signal, and the subcarrier arrangement used at this time is also selected. Is separately notified via a control channel or the like, and the receiving device can demodulate the OFDM signal by using the notified subcarrier arrangement, so that it is possible to perform an appropriate correction corresponding to the change in the transmission path characteristic, As a result, the correction accuracy can be further improved.

Further, in the above-described embodiment, the data carrier is 16QAM-modulated, but the present invention is not limited to this, and the data carrier is modulated by various other modulation methods such as 64QAM modulation and QPSK modulation. You may do it.

In the above embodiment, the data pilot carrier is phase-modulated by the QPSK method, but the present invention is not limited to this, and the data pilot carrier is modulated by the BPSK method according to the state of the transmission line. Phase modulation may be performed. In this case, the transmission data rate of each data pilot carrier is halved, but BPSK
Since the method is less affected by the phase rotation than the QPSK method, appropriate correction can be performed even when the state of the transmission path is poor. If the transmission line is in good condition, the data pilot carrier is set to 8PSK (8Phase Shift
Keying) may be used for phase modulation. In this case, the transmission data rate of each data pilot carrier is 1.5 times that in the case of using the QPSK method.

Further, in the above-described embodiment, the correction value of the data carrier is calculated by linearly interpolating the correction value of the pilot carrier and the data pilot carrier, but the present invention is not limited to this, and various other interpolations are possible. The method may be used to calculate the correction value for the data carrier.

Further, in the above embodiment, OF
The case where the present invention is applied to the wireless communication system using the DM system has been described, but the present invention is not limited to this, and the present invention can be applied to various other multicarrier communications.

[0051]

As described above, according to the present invention, an interpolated pilot carrier for interpolating the pilot carrier and transmitting data is arranged between a plurality of pilot carriers for use as a reference of phase and amplitude. Then, at the time of reception, the phase correction value and amplitude correction value for each data carrier are calculated using the phase rotation value and amplitude change value for each pilot carrier and the phase rotation value and amplitude change amount for each interpolation pilot carrier. By doing so, it is possible to obtain appropriate phase correction value and amplitude correction value that correspond well to the change in transmission line characteristics for each subcarrier, and further improve the correction accuracy for the phase rotation and amplitude change for each subcarrier. It is possible to reduce transmission errors and improve the transmission data rate of the entire system.

Since the data is transmitted via the interpolation pilot carrier together with the data carrier, the reduction of the transmission data rate due to the provision of the interpolation pilot carrier can be minimized.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a wireless communication system according to the present invention.

FIG. 2 is a schematic diagram showing a subcarrier arrangement according to the present invention.

FIG. 3 is a schematic diagram showing a method of detecting a phase rotation amount of a data pilot carrier.

FIG. 4 is a characteristic curve diagram showing an amplitude change amount and an amplitude correction value.

FIG. 5 is a schematic diagram showing a subcarrier arrangement according to another embodiment.

FIG. 6 is a characteristic curve diagram showing an example of transmission line characteristics.

FIG. 7 is a schematic diagram showing a conventional subcarrier arrangement.

FIG. 8 is a characteristic curve diagram showing an example of transmission line characteristics.

[Explanation of symbols]

1 ... Wireless communication system, 2 ... Transmission device, 3 ... Reception device, 10 ... Serial-parallel conversion unit, 11 ... Modulation unit, 12 ...
... IFFT section, 13 ... Transmission section, 14, 21 ... Antenna, 22 ... Reception section, 23 ... FFT section, 24 ... Demodulation section, 25 ... Amplitude / phase corrector, 26 ... Pilot carrier detection 27 ... Data pilot carrier detector, 28 ... Correction value calculator, 29 ... Demapping unit,
30 ... Parallel-serial converter.

Claims (18)

[Claims] 1. A multi-carrier modulation wireless communication system for transmitting data between a transmission device and a reception device via a plurality of subcarriers, wherein the transmission device is one of the plurality of subcarriers. For modulating the plurality of subcarriers of a part as a plurality of pilot carriers for using as a reference of phase and amplitude, and for transmitting a part of the other plurality of subcarriers while interpolating the pilot carrier and transmitting the data. Of a plurality of interpolating pilot carriers are modulated by a phase modulation method, the remaining plurality of subcarriers are modulated as a plurality of data carriers for transmitting the data, and the plurality of data carriers and the interpolating pilot carriers are The subcarrier modulation means for modulating, the plurality of pilot carriers, the interpolation pilot The multi-carrier modulation means for generating a multi-carrier modulation signal by combining the carrier and the data carrier by performing an inverse Fourier transform, and a signal transmission means for transmitting the multi-carrier modulation signal, wherein the receiving device is the multi-carrier A signal receiving means for receiving a modulated signal; a multicarrier demodulating means for separating the received multicarrier modulated signal by Fourier transform into a plurality of pilot carriers, an interpolating pilot carrier, and a data carrier; Phase / amplitude detecting means for detecting the amount of phase rotation and the amount of amplitude change for each pilot carrier and the interpolating pilot carrier, and the phase rotation amount and the amount of amplitude change for each of the plurality of detected pilot carriers and the interpolating pilot carrier. Each A correction value calculating means for calculating a phase correction value and an amplitude correction value for the plurality of interpolated pilot carriers and data carriers; and a plurality of the interpolated pilot carriers, based on the calculated phase correction value and amplitude correction value. A correction means for correcting the phase and the amplitude of the data carrier; and a subcarrier demodulation means for demodulating the data from the plurality of interpolated pilot carriers and the data carriers whose phases and amplitudes are corrected by the correction means. Wireless communication system. 2. The wireless communication system according to claim 1, wherein the plurality of interpolated pilot carriers are arranged substantially evenly among the plurality of pilot carriers. 3. The subcarrier modulating means uses the pilot carrier as BPSK (Binary Phase Shift Keying).
) System, the interpolated pilot carrier is BPSK system, QPSK (Quadrature Phase Shift Key) system.
ing) system or 8PSK (8Phase Shift Keying) system, and the data carrier is phase-modulated or amplitude-phase-modulated. 4. The phase / amplitude detection means, based on the detected phase rotation amount of the pilot carrier,
The radio communication system according to claim 3, wherein a phase rotation amount for the interpolation pilot carrier is calculated. 5. A plurality of arrangement patterns of the plurality of pilot carriers and interpolating pilot carriers are provided, and the subcarrier modulation means modulates the plurality of subcarriers using one of the plurality of arrangement patterns. The signal transmitting means transmits the arrangement pattern information used by the subcarrier modulating means together with the multicarrier modulation signal, and the receiving device demodulates the multicarrier modulation signal based on the received arrangement pattern information. The wireless communication system according to claim 1, wherein: 6. A multicarrier wireless communication method for transmitting data via a plurality of subcarriers, wherein a plurality of subcarriers among some of the plurality of subcarriers are used as a reference of phase and amplitude. Of the other part of the plurality of subcarriers are interpolated with the pilot carrier and modulated with a phase modulation method as a plurality of interpolated pilot carriers for transmitting the data, and the remaining plurality of A subcarrier modulation step of modulating a subcarrier by a predetermined modulation method as a plurality of data carriers for transmitting the data, and a subcarrier modulation step of modulating the plurality of data carriers and an interpolation pilot carrier with the data; , Interpolation pilot carrier and data carrier inverse Fourier A multicarrier modulation step of generating a multicarrier modulation signal by combining by conversion, a signal transmission step of transmitting the multicarrier modulation signal, a signal reception step of receiving the multicarrier modulation signal, and the received multicarrier signal A multi-carrier demodulation step of separating the plurality of pilot carriers, interpolation pilot carriers and data carriers by performing Fourier transform on the carrier modulation signal, and phase rotation amount and amplitude change amount for each of the plurality of pilot carriers and interpolation pilot carriers. Based on the phase rotation amount and amplitude change amount for each of the detected pilot carriers and interpolated pilot carriers, the phase / amplitude detection step for detecting A correction value calculation step for calculating a phase correction value and an amplitude correction value for the carrier, and a correction for correcting the phase and amplitude of the plurality of interpolated pilot carriers and data carriers based on the calculated phase correction value and amplitude correction value. And a subcarrier demodulation step of demodulating the data from the plurality of interpolated pilot carriers and data carriers whose phases and amplitudes have been corrected, the multicarrier wireless communication method. 7. The multicarrier wireless communication method according to claim 6, wherein the plurality of interpolated pilot carriers are arranged substantially evenly among the plurality of pilot carriers. 8. The BPSK (Bina
phase modulation by the ry Phase Shift Keying method, and the interpolated pilot carrier is BPSK method, QPSK (Quadra
turePhase Shift Keying method or 8PSK (8Phase
7. The multi-carrier wireless communication method according to claim 6, wherein the data carrier is phase-modulated or amplitude-phase modulated by any one of shift keying) methods. 9. The multi-carrier wireless communication method according to claim 8, wherein the phase rotation amount for the interpolated pilot carrier is calculated based on the detected phase rotation amount for the pilot carrier. 10. The subcarrier modulation means comprising a plurality of arrangement patterns of the plurality of pilot carriers and interpolation pilot carriers, wherein the plurality of subcarriers are modulated using one of the plurality of arrangement patterns. 7. The multi-carrier wireless communication method according to claim 6, wherein the arrangement pattern information used by is transmitted together with the multi-carrier modulated signal, and the multi-carrier modulated signal is demodulated based on the received arrangement pattern information. 11. A multicarrier modulation type transmitting apparatus for transmitting data via a plurality of subcarriers, wherein a part of the plurality of subcarriers is used as a phase and amplitude reference. While modulating as a plurality of pilot carriers of the other, some other plurality of subcarriers are modulated by the phase modulation method as a plurality of interpolating pilot carriers for interpolating the pilot carriers and transmitting the data, and Subcarrier modulation means for modulating a plurality of subcarriers as a plurality of data carriers for transmitting the data, and modulating the plurality of data carriers and an interpolation pilot carrier with the data, the plurality of pilot carriers, an interpolation pilot Inverse Fourier transform of carrier and data carrier Transmitter for a multicarrier modulation means for generating a multicarrier modulated signal by combining, characterized in that it comprises a signal transmitting means for transmitting the multicarrier modulated signal by. 12. The plurality of interpolated pilot carriers are
The transmitter according to claim 11, wherein the transmitters are arranged substantially evenly among the plurality of pilot carriers. 13. The subcarrier modulation means uses the pilot carrier as a BPSK (Binary Phase Shift Keyin).
g) phase-modulates the interpolated pilot carrier by the BPSK method, QPSK (Quadrature Phase Shift Key).
ing) system or 8PSK (8 Phase Shift Keying) system, and the data carrier is phase-modulated or amplitude-phase modulated. 14. A plurality of arrangement patterns of the plurality of pilot carriers and interpolating pilot carriers are provided, and the subcarrier modulation means modulates the plurality of subcarriers using one of the plurality of arrangement patterns. 12. The transmitting apparatus according to claim 11, wherein the signal transmitting means transmits the arrangement pattern information used by the subcarrier modulating means together with the multicarrier modulated signal. 15. A signal receiving means for receiving a multicarrier modulation signal in which a plurality of subcarriers are combined, and Fourier transform of the received multicarrier modulation signal to obtain the multicarrier modulation signal in phase and amplitude. A plurality of reference pilot carriers, a plurality of phase modulation interpolated pilot carriers for interpolating the pilot carriers and transmitting data, and a plurality of phase modulation system data carriers for transmitting the data And a multi-carrier demodulation means for separating into a plurality of phases, a phase / amplitude detection means for detecting the amount of phase rotation and the amount of change in amplitude for each of the plurality of pilot carriers and the interpolation pilot carrier, and the plurality of detected pilot carriers and interpolation pilot carriers Phase for each On the basis of the transfer amount and the amplitude change amount, a correction value calculating means for calculating a phase correction value and an amplitude correction value for the plurality of interpolated pilot carriers and data carriers, and based on the calculated phase correction value and the amplitude correction value. Correction means for correcting the phases and amplitudes of the plurality of interpolation pilot carriers and data carriers, and subcarrier demodulation means for demodulating data from the plurality of interpolation pilot carriers and data carriers whose phases and amplitudes have been corrected by the correction means A receiving device comprising: 16. The plurality of interpolated pilot carriers are
The receiving device according to claim 15, wherein the receiving devices are arranged substantially evenly among the plurality of pilot carriers. 17. The pilot carrier is BPSK (Bi
nary phase shift keying) is used for phase modulation, and the above-mentioned interpolated pilot carrier is BPSK, QPSK (Qu
adrature Phase Shift Keying method or 8PSK (8
Phase shift keying)
The receiving device according to claim 15, wherein the data carrier is phase-modulated or amplitude-phase modulated. 18. The phase / amplitude detection means calculates a phase rotation amount for the interpolation pilot carrier based on the detected phase rotation amount for the pilot carrier. Receiver.