JP4727603B2 - Wireless communication apparatus and wireless communication system - Google Patents

Description

  The present invention relates to a radio communication apparatus and a radio communication system that transmit and receive a plurality of carrier signals of two polarizations, and in particular, polarization adjustment is possible for each carrier and band sharing with other systems using only one polarization is possible. The present invention relates to a possible wireless communication apparatus and a wireless communication system.

  FIG. 3A shows a configuration example of a wireless communication apparatus that transmits a conventional multicarrier polarization multiplexed signal, and FIG. 3B shows a configuration example of a wireless communication apparatus that includes a conventional RF polarization control mechanism. . FIG. 3A refers to Non-Patent Document 1, and FIG. 3B refers to the configuration of the wireless communication apparatus disclosed in Non-Patent Document 2.

  The reception system in FIG. 3A includes reception antennas 21a and 21b, receivers 27a and 27b, frequency demultiplexing circuits 22a and 22b, interference compensation circuit 24, propagation path matrix estimation circuit 23, multiple carrier demodulation circuits 25a and 25b, and synthesis. The circuit 26 is configured. On the other hand, the transmission system includes a branch circuit 28, multiple carrier modulation circuits 29a and 29b, frequency multiplexing circuits 210a and 210b, transmitters 211a and 211b, and transmission antennas 212a and 212b.

  Next, a signal flow in the wireless communication apparatus will be described. The receiving antennas 21a and 21b are two polarization receiving antennas of the wireless communication device. Signals received at two polarization planes of the wireless communication device are respectively input to subsequent receivers 27a and 27b, where filtering, amplifier processing, frequency conversion, and the like are performed. Outputs from the receivers 27a and 27b are input to frequency demultiplexing circuits 22a and 22b, respectively, and are frequency demultiplexed into carrier unit signals. Each carrier signal demultiplexed by the frequency demultiplexing circuit is estimated by the propagation channel matrix estimation circuit 23 for each carrier from the training signal included in each carrier. The propagation path matrix estimation method is the same as that of the prior art shown in Non-Patent Document 4. If the two polarizations are vertical / horizontal polarization, a training signal is inserted into the transmission vertical / horizontal polarization signal, and a matched pulse is output when the reception side detects the training signal in the reception vertical / horizontal polarization signal. Apply a matched filter. In the received vertical polarization signal, the matched pulse for the transmission signal with the transmission vertical polarization is set as h11. In the reception vertical polarization signal, the matched pulse for the training signal with the transmission horizontal polarization is set as h12, and in the received horizontal polarization signal. The matched pulse with respect to the transmission vertical polarization training signal is set as h21, and the received pulse with respect to the transmission horizontal polarization training signal is set as h22 in the received horizontal polarization signal, so that individual elements of the channel matrix can be estimated. .

  The interference compensation circuit 24 performs interference compensation of the received signal using the propagation path matrix H detected in units of carriers. Interference compensation can be realized by applying MMSE which is the conventional technique described in Non-Patent Document 3. The interference-compensated signals are respectively input to a plurality of carrier demodulation circuits 25a and 25b, and demodulated in units of carriers. Since the information signals of the respective multicarrier signals are independently output from the multi-carrier demodulating circuit, the signal is converted into one system signal by the synthesizing circuit 26 and the transmitted information signal is restored.

  On the other hand, the transmission system branches the information signal to be transmitted into two systems of signals by the branch circuit 28. Each system signal is divided into a plurality of carrier signals by a plurality of carrier modulation circuits 29a and 29b, and a modulation process is performed for each carrier. Signals of two systems of multiple carriers that are independently modulated by the multiple carrier modulation circuits 29a and 29b are input to the frequency multiplexing circuits 210a and 210b, respectively, and are frequency multiplexed. The frequency-multiplexed signals are independently frequency-converted and amplified by transmitters 211a and 211b, respectively, and transmitted from antennas 212a and 212b having two polarization planes.

  In the conventional wireless communication apparatus shown in FIG. 3A, the RF polarization tracking function (214a, 214b, and 215 in FIG. 3B) does not exist in the receiver and the transmitter. Instead, the polarization tracking function is realized by estimating the propagation path matrix H by the propagation path matrix estimation circuit 23 using the baseband received signal and compensating for the inter-polarization interference by the interference compensation circuit 24. The above is the conventional wireless communication apparatus example 1.

  As another embodiment of the conventional wireless communication apparatus, FIG. 3B shows a wireless communication apparatus having an RF polarization tracking function. 3B includes a reception antenna 213a, a polarization control amount setting circuit 215, polarization control circuits 214a and 214b, a receiver 216, a demodulation circuit 217, a modulation circuit 218, a transmitter 219, and a transmission antenna 213b. For simplicity, satellite communication is assumed as wireless communication. In Ku-band satellite communications, both polarization signals are generally used. The polarization axis of the wireless communication device is mechanically adjusted so that the polarization plane of the wireless communication device coincides with the polarization plane of the satellite relay station. Start. In this case, the polarization control amount setting circuit 215 of the wireless communication device uses the beacon wave separately received from the satellite and the GPS data which is the position data of the local station, and the polarization axis and satellite relay of the local wireless communication device. The difference of the polarization axis unique to the station is detected, and the polarization control amount is determined. Thereafter, the polarization plane is rotated by the polarization control amount by the polarization control circuit 214a so that the polarization plane of the own station and the polarization plane of the satellite relay station coincide. The polarization-controlled signal is subjected to amplification, frequency conversion, filter processing, and the like by the receiver 216. Thereafter, the information signal demodulated and transmitted by the demodulation circuit 217 is restored.

  On the other hand, in the transmission system, the information signal is modulated by the modulation circuit 218, and output by the transmitter 220 after frequency conversion, filtering, and amplification. The signal output from the transmitter 220 is adjusted by the polarization control circuit 214b so that the polarization plane of the wireless communication device and the polarization plane of the satellite repeater coincide with each other, and output from the transmission antenna 213b as a single polarization signal. As described above, the conventional wireless communication apparatus shown in FIG. 3B is characterized in that the polarization control is collectively performed without distinguishing the transmission carrier in the RF system.

  FIG. 4 shows a problem in realizing a polarization multiplexing communication system using a conventional multicarrier polarization multiplexed signal wireless communication apparatus. FIG. 4 shows a system composed of a conventional wireless communication apparatus and a relay station that communicates therewith. In this example, satellite communication is assumed and the communication example between the wireless communication apparatus and the relay station is described. However, when general terrestrial wireless communication is assumed, a base station may be used instead of the relay station. FIG. 4 shows two transmission systems independent of the multi-carrier modulation circuits 29a and 29b, and the modulated signals of the carrier 1, carrier 2 and carrier 3 as shown in FIG. 4 (a) are individually output. Represents the status of reception.

  4, signals A1 and A2 are arranged in different systems in the same frequency band in carrier 1, but carrier 2 arranges signals only in B1 of transmission system 1, and carrier 3 arranges signals only in C2 of transmission system 2. . Next, these signals are frequency multiplexed by frequency multiplexing circuits 210a and 210b provided for each transmission system so that A1 and A2 are frequency f1, B1 is frequency f2, and C2 is frequency f3, respectively. It becomes a frequency multiplex signal of 2 systems like 4 (b). In FIG. 4B, signals are not arranged in the transmission system 2 of the carrier 2 and the transmission system 1 of the carrier 3, respectively, and f3 of the transmission system 1 and f2 of the transmission system 2 are vacant bands. These two systems of frequency multiplexed signals are subjected to frequency conversion, filter processing, and amplification processing in the transmitters 211a and 211b, respectively, and are transmitted to the relay station from the antennas 212a and 212b provided for each transmission system. Here, the antenna 212a is an antenna that transmits a signal of the transmission system 1 with vertical polarization unique to the wireless communication apparatus, and the antenna 212b is an antenna that transmits a signal of the transmission system 2 with horizontal polarization specific to the wireless communication apparatus. is there.

On the other hand, the signals of the transmission system 1 and the transmission system 2 transmitted in the vertical polarization and the horizontal polarization unique to these wireless communication devices are transmitted to the vertical polarization antenna specific to the relay station at the receiver of the relay station 214 after spatial propagation. 215a, and a relay station-specific horizontal antenna 215b. For example, as shown in FIG. 4, if the propagation path matrix between the transmitter of the relay station and the receiver of the wireless communication apparatus is H, and the reciprocity of the propagation paths is established, the transmitter of the wireless communication apparatus The propagation path matrix for the receiver is ideally H ^T (H transpose matrix).

となる。同様に周波数ｆ３の信号Ｃ２に着目すると、送信系統２のアンテナ２１２ｂから送信された信号Ｃ２は伝搬過程で

となる。上式（２）は１系統から送信された信号Ｃ２が中継受信局ではＣ２ａとＣ２ｂの２系統に分かれて存在することを意味する。 Next, attention is focused on B1 transmitted at the frequency f2 of the transmission system 1 of the wireless communication apparatus. As shown in FIG. 5, the signal B1 is transmitted by a horizontally polarized antenna unique to the wireless communication apparatus. On the other hand, the relay station receives the B1 signal by the vertically polarized antenna 215a and the horizontally polarized antenna 215b provided in the relay station. Here, since the polarization planes of the wireless communication apparatus and the relay station are physically independent from each other, the polarization axes of the two do not usually coincide. Therefore, as shown in FIG. 5, B1 is vector-decomposed into B1a and B2a and received by the relay station. This can be expressed as an expression

It becomes. Similarly, paying attention to the signal C2 of the frequency f3, the signal C2 transmitted from the antenna 212b of the transmission system 2 is in the propagation process.

It becomes. The above equation (2) means that the signal C2 transmitted from one system is divided into two systems C2a and C2b at the relay receiving station.

  In this case, the frequency multiplexing signals of the two relay station reception systems are as shown in FIG. Regarding the frequency f2, the wireless communication apparatus transmits B1 by one transmission system (single polarization), but B1 is B1a and B1b at the relay station due to the mismatch of the polarization planes of the wireless communication apparatus and the relay station. As a result, the frequency f2 cannot be shared with another user.

  Similarly, regarding the frequency of f3, although C2 is transmitted by one system, the relay station occupies two relay station reception systems as C2a and C2b, and shares the frequency f3 with another user. I could not.

  As described above, even if a conventional wireless communication apparatus is assigned a band that uses only one transmission system such as the carrier 2 and the carrier 3 shown in FIG. The signals received at the relay station due to the mismatch of the wave fronts are divided into two systems and one signal is occupied. Therefore, in the conventional multicarrier polarization multiplexing transmission, it is not desirable in terms of frequency utilization efficiency to mix the allocation of one transmission system to one transmission carrier. In other words, it means a band allocation constraint that it is desirable to allocate carriers of the same frequency and both polarization signals such as A1 and A2 as a pair to a multicarrier polarization multiplexed transmission user. When a single user shares a single system bandwidth, there is a problem in terms of ensuring flexibility in bandwidth allocation.

  For example, as shown in FIG. 4D, it is assumed that the user D transmits the signal D2 after adjusting the polarization so that the transmission system 2 of the local station matches the relay station reception system 2 using the conventional technique. . On the other hand, as shown in FIG. 4 (e), it is assumed that the user E transmits the signal E1 after adjusting the polarization so that the transmission system 1 of the local station matches the relay station reception system 1 using the conventional technique. . In this case, since the signal B1b and the signal C2a have the same frequency interference as the signal D2 and the signal E1, respectively, either the use of the users D and E is stopped or the use of B1 and C2 is stopped in the wireless communication apparatus. Had to choose. In other words, the conventional multi-carrier polarization multiplexed signal wireless communication device user and the existing single polarization user cannot share the frequency band.

  On the other hand, the radio communication apparatus having the RF polarization control mechanism described with reference to FIG. 3B as another conventional technique adjusts the polarization of multicarrier signals in a lump by RF, so that the polarization is adjusted in units of carriers. There was a problem that could not be done. Further, since polarization control in RF is affected by temperature characteristics and aging deterioration, there is a problem in terms of adjustability such as adjustment necessary to maintain polarization control accuracy.

Yamashita et al. “Proposal of Polarization / Frequency Division Multiplexing (VPFDM) and Application to Satellite Communication”, IEICE Technical Report SAT 2005-44 Naoshi Iida, “Satellite Communication”, Ohmsha, PP. 142 Ogane et al. “Space Division Multiplexing in MIMO Channel and its Basic Characteristics”, IEICE Transactions B Vol. J87-B No. 9 pp. 1162-1173, 20044.9 F. Yamashita, et al, “Variable Polarization / Frequency Division Multiplexing (VPFDM) for satellite communications”, IEEE VTC-FALL international 200, Reference 2

  An object of the present invention is to provide a radio communication apparatus and a radio communication system that can adjust the polarization for each carrier and can share a band with other systems using only one polarization.

The wireless communication device and the wireless communication system according to the present invention are wireless communication devices in which one user transmits and receives a plurality of independent carrier signals of two polarizations, and the wireless communication device transmits a plurality of reference signals on two polarization planes specific to the user. Channel estimation means for receiving and estimating a channel state from the reference signal;
Modulation means for branching the transmission information into two transmission systems, dividing the information of each transmission system into a plurality of carriers, independently modulating each carrier, and outputting the modulated signals as two systems;
In the two systems of modulation signals, the propagation path estimation means for at least one of the modulation signals in which the modulation signal exists in the frequency band of one of the systems but does not exist in the same frequency band of the other system And a control means for multiplying a compensation matrix corresponding to the propagation path matrix estimated in (1).

  The conventional radio communication apparatus and radio communication system shown in FIG. 3 (a) is different from the transmission modulation signal of two transmission systems of a plurality of carriers, in which there is a modulation signal in the frequency band of either system. And a control means for multiplying at least one of the modulated signals having no signal in the same frequency band by a compensation matrix corresponding to the propagation path matrix estimated from the reception information of the reference signal.

  In addition, with the conventional wireless communication apparatus shown in FIG. 3B, transmission / reception polarization control is not performed for the transmission / reception band at the same time by the RF circuit, but the propagation path matrix is estimated for each carrier from the reception information of the reference signal. The difference is that transmission polarization control is performed for each carrier based on the information.

  According to the radio communication apparatus and radio communication system of the present invention, a user who transmits and receives a multicarrier polarization multiplexed signal controls the transmission polarization axis of some carriers using a propagation path matrix estimated from the received signal. As a result, it is possible to share the bandwidth with another user who uses unipolarization in the existing system, and as a result, the flexibility of bandwidth allocation to the user is improved.

  With the wireless communication device and the wireless communication system of the present invention, if the bandwidth allocation flexibility for users who transmit and receive multi-carrier polarization multiplexed signals is improved, the frequency utilization efficiency is improved, so that the transmission rate per user is increased. Or it leads to the increase in the number of user capacity.

  FIG. 1 shows an embodiment of the present invention.

  The radio communication system of FIG. 1 transmits a control signal to a control signal generation circuit that transmits a control signal including a training signal as a reference signal, a radio communication device that transmits and receives a multicarrier polarization multiplexed signal, and a radio communication device; It is comprised from the relay station which receives the signal from a radio | wireless communication apparatus. The embodiment of the present invention assumes satellite communication, which is one type of wireless communication, and assumes signal transmission / reception between the wireless communication device and the relay station. When assuming general terrestrial wireless communication, the relay station of this example can be replaced with a base station.

  The control signal generation circuit 117 generates a control signal including a training signal, and transfers the control signal to the relay station transmitter. However, signal transmission between the control device and the relay station may be wired or wireless. In general, assuming satellite communication, since the control device is located on the ground base station, the control signal is transmitted wirelessly between the ground base station and the satellite relay station.

  The relay station includes a relay station transmitter 116, a relay station receiver 120, a relay station transmission antenna 115a that transmits a signal of the relay station transmission system 1, and a relay transmission antenna 115b that transmits a signal of the relay station transmission system 2. In the embodiment of the present invention, it is assumed that signals are transmitted from the two antennas in the vertical polarization plane of the relay station and the horizontal polarization plane of the relay station, but the present invention is not limited to this polarization plane. Two circularly polarized waves are also possible.

  On the other hand, the reception system of the wireless communication apparatus includes reception antennas 11a and 11b, receivers 12a and 12b, frequency demultiplexing circuits 13a and 13b, interference compensation circuit 14, propagation path matrix estimation circuit 110, multiple carrier demodulation circuits 15a and 15b, and synthesis. The circuit 16 is configured to receive a reception signal having two polarization planes. The transmission system includes a branch circuit 17, multiple carrier modulation circuits 18a and 18b, a polarization control circuit 19, a polarization control carrier selection circuit 111, frequency multiplexing circuits 112a and 112b, transmitters 113a and 113b, a transmission antenna 114a, 114b, and transmits a signal to be transmitted on two polarization planes.

  Next, the flow of signals in the radio communication apparatus and radio communication system of FIG. 1 will be described. Assume that the control signal generation circuit 117 generates a vertical polarization signal CSCV and a horizontal polarization signal CSCH, respectively, and simultaneously transmits them at different frequencies fv and fh as shown in FIG. For simplicity, this control signal, that is, the reference signal is assigned to different frequencies. However, when an orthogonal code is applied to a vertical / horizontal polarization control signal, since the control signal can be separated by a receiving circuit, the vertical polarization control signal CSCV and the horizontal polarization control at the same frequency are possible. The signal CSCH may be assigned.

  On the other hand, the wireless communication apparatus simultaneously receives CSCV and CSCH control signals on the vertical / horizontal polarization planes inherent to the wireless communication apparatus, as shown in FIG. At this time, since the polarization planes of the radio communication apparatus and the relay station do not match, the CSCV and CSCH are received in the form of the propagation path matrix H multiplied by the propagation process. This reception situation is expressed by the following equation (3).

  The four components of the matrix factor included in the right side of Equation (3) are received as different independent signals. Amplification, frequency conversion, and filter processing are performed by the receiver for each polarization, and frequency demultiplexing is performed for each carrier by a frequency demultiplexing circuit provided for each polarization. A control signal corresponding to the carrier frequency fv and the carrier frequency fh is extracted from the frequency-demultiplexed signal, and components of h11, h12, h21, and h22 that are individual elements of the propagation path matrix H are extracted by the propagation path matrix estimation circuit 110. Extract each one. Note that the extraction of the propagation path matrix is the same as in the prior art disclosed in Non-Patent Document 4. If the two polarizations are vertical / horizontal polarization, a training signal is inserted into the transmission vertical / horizontal polarization signal, and a matched pulse is output when the reception side detects the training signal in the reception vertical / horizontal polarization signal. Apply a matched filter. In the received vertical polarization signal, the matched pulse for the transmission signal with the transmission vertical polarization is set as h11. In the reception vertical polarization signal, the matched pulse for the training signal with the transmission horizontal polarization is set as h12, and in the received horizontal polarization signal. The matched pulse with respect to the transmission vertical polarization training signal is set as h21, and the received pulse with respect to the transmission horizontal polarization training signal is set as h22 in the received horizontal polarization signal, so that individual elements of the channel matrix can be estimated. .

  On the other hand, although explanation is omitted in FIGS. 2 (a) and 2 (b), in actual communication, the signal transmitted from the relay station has a band other than the control carrier transmitted from the control signal generation circuit 117. There is a signal communicating with the user. These signals are also subjected to frequency demultiplexing for each polarization in the same manner as the control carrier, and the propagation path matrix estimation circuit estimates the propagation path matrix H for each carrier. Thereafter, the interference compensation circuit 14 uses the propagation path matrix H to compensate for the polarization interference in the received signal for each carrier. Although there are several interference compensation algorithms, MMSE can be applied as in the prior art. Since the operation principle of MMSE is described in Non-Patent Document 3, description thereof will be omitted.

  Each signal in which the inter-polarization interference is compensated for each carrier is input to the subsequent multi-carrier demodulator and demodulated for each carrier. The signal demodulated for each carrier is combined with the signal previously processed for each polarization by the combining circuit 16 and restored to the original one-system information signal.

  On the other hand, in the transmission system, transmission information is branched into two systems of signals (transmission system 1 and transmission system 2) by the branch circuit 17, and each transmission system signal is divided into multi-carrier signals independently for each transmission system, Each modulation process is performed. As an example, as in FIG. 4A described in the description of the prior art, signals A1 and A2 having the same bandwidth in two transmission systems are arranged on the carrier 1, and signals only on the transmission system 1 are arranged on the carrier 2. The signal C2 is arranged only in the transmission system 2 in the carrier 3 and B1. A1, A2, B1, and C2 are respectively input to the polarization control circuit 19. In the present invention, the polarization control carrier selection circuit 111 determines a signal that is arranged only in one of the transmission systems. That is, the polarization control circuit 19 applies the following polarization control processing to the signals B1 and C2.

  B1 is arranged only in the transmission system 1, and there is no signal at the same frequency of the transmission system 2. Therefore, when this input is multiplied by the inverse matrix of the transposed matrix of the propagation path matrix H estimated by the propagation path matrix estimation circuit 110 as a compensation matrix when receiving the control signal, the output from the polarization control circuit 19 is expressed by the following equation: It is represented by (4).

  That is, B1 is divided into two components, B1a 'of the transmission system 1 and B1b' of the transmission system 2.

  On the other hand, C2 exists only in the transmission system 2, and the transmission system 1 has no signal. Therefore, when this input is multiplied by a transposed inverse matrix of the propagation path matrix H estimated from the control signal as a compensation matrix, the output from the polarization control circuit 19 is expressed by the following equation (5). Then, C2a ′ and transmission system 2 are divided into C2b ′.

  On the other hand, since A1 and A2 are signals of both polarizations, the polarization control circuit 19 in FIG. 1 is bypassed and polarization control is not performed. In summary, the output from the polarization control circuit is expressed as shown in FIG. The signals of the respective carriers are frequency-multiplexed as signals of frequencies f1, f2, and f3 by frequency multiplexing circuits 112a and 112b provided independently for each transmission system. The frequency characteristics at this time are shown in FIG. Frequency-multiplexed signals of each transmission system are input to transmitters 113a and 113b, respectively, and transmitted from antennas 114a and 114b after frequency conversion, amplification, and filtering.

Here, assuming that the propagation path matrix from the control apparatus to the wireless communication apparatus is H, and the reciprocity is established in the propagation path from the wireless communication apparatus to the control apparatus, the propagation path matrix from the wireless communication apparatus to the control apparatus is It is represented by H ^T. Accordingly, the transmit antenna 114a, signals of frequency f2 signal sent from 114b is received by the relay station via a channel of the H ^T is expressed by the equation (6).

  Further, the signal of frequency f3 received by the relay station is expressed by equation (7).

  Therefore, as a result of the two systems of signals transmitted from the transmission system 1 and the transmission system 2 of the wireless communication apparatus being received by the relay station via the propagation path, the frequency characteristics of the two systems of the relay reception system are shown in FIG. become that way.

  Since the transmission polarization control for each carrier is not performed in the prior art, as shown in FIG. 4 (c), there is no vacant band in the frequencies f1 and f2 of the repeater reception systems 1 and 2, and the multicarrier polarization multiplexed radio communication apparatus Could not share the bandwidth with other users D and E.

  However, when the technique of the present invention is applied, the polarization control circuit 19 performs transmission polarization control for each carrier using a compensation matrix. Therefore, in the relay station reception system, as shown in FIG. Vacant band can be generated for the carrier of frequency f2 and the carrier of frequency f3 of the relay station reception system 1. Therefore, as shown in FIG. 2 (g), another user D and user E can communicate with each other using the vacant bandwidth of each relay station reception system.

  In this case, as a result of the polarization control for each carrier according to the present invention, as shown in FIG. 2 (h), signals A1a, A1b, B1 from the wireless communication apparatus are used for three carrier signals of frequencies f1, f2, f3. , C2 and a signal D2 from another user D and a signal E1 from another user E can coexist.

  Conventionally, since D2 and E1 have the same frequency interference as B1b and C2a as described with reference to FIG. 4 (d), they cannot share at the same time while sharing a band. However, if the technique of the present invention is used, the multicarrier polarization multiplexed signal transmitted by the wireless communication apparatus and the existing different users D2 and E1 can communicate simultaneously, and the flexibility of channel assignment for the multicarrier polarization multiplexed user is improved.

It is a block diagram of the Example of the radio | wireless communication apparatus and radio | wireless communications system of this invention. The spectrum of each part in the apparatus of FIG. 1 is shown. 1 shows a conventional wireless communication device. It is a figure which shows the problem of the conventional radio | wireless communication apparatus and system for multicarrier polarization multiplexing signals. It is a figure which shows generation | occurrence | production of the propagation path matrix by transmission / reception polarization plane mismatch.

Explanation of symbols

11a, 11b Receiving antennas 12a, 12b Receivers 13a, 13b Frequency demultiplexing circuit 14 Interference compensation circuits 15a, 15b Multi-carrier demodulation circuit 16 Synthesis circuit 17 Branch circuit 18a, 18b Multi-carrier modulation circuit 19 Polarization control circuit 111 Polarization control Carrier selection circuit 112a, 112b Frequency synthesis circuit 113a, 113b Transmitter 114a, 114b Transmit antenna 115a, 115b Transmit antenna 116 Relay station transmitter 117 Control signal generation circuit 119a, 119b Receive antenna 120 Relay station receiver

Claims (6)

In a wireless communication device in which each user transmits and receives a plurality of independent carrier signals of two polarizations,
It has two reception systems and two transmission systems corresponding to each polarization,
Propagation path estimating means (110) for estimating a propagation path state from a reference signal received by the reception system at two polarization planes,
The transmission system is
A branch circuit (17) for branching an information signal to be transmitted into two transmission systems;
Modulation means (18a, 18b) that divides the information signal of each branched transmission system corresponding to a plurality of carriers, modulates each carrier independently, and outputs the modulated signals as two systems;
From the two modulation signals output from the modulation means, a modulation signal that has a modulation signal in the frequency band of a carrier in one system but does not exist in the frequency band of the same carrier in another system is selected. Sorting means (111) to perform,
Connected to the output of the modulating means, and against the modulating signal said selecting means has selected, polarization control means for multiplying the compensation matrix corresponding to the channel matrix estimated by the channel estimation means (19) radio communication apparatus characterized by obtaining Bei.   The wireless communication apparatus according to claim 1, wherein the compensation matrix is a transposed inverse matrix of a propagation path matrix.   In the reference signal, one polarization has a first control signal (CSCV) and the other polarization has a second control signal (CSCH) on the side that transmits the information signal to the wireless communication device. The wireless communication apparatus according to claim 1.   The first control signal (CSCV) and the second control signal (CSCH) are received as a first reception control signal and a second reception control signal with two polarizations of a wireless communication device, and The wireless communication apparatus according to any one of claims 1 to 3, wherein a component of an individual element of the channel matrix is extracted using the reception control signal and the second reception control signal. In a wireless communication system including a wireless communication device in which each user transmits and receives a plurality of independent carrier signals of two polarizations, and a control device that transmits a control signal ,
The control device transmits a control signal having a first control signal (CSCV) in one polarization and a second control signal (CSCH) in the other polarization,
The wireless communication device
Each user transmits and receives a plurality of independent carrier signals of two polarizations, and has two reception systems and two transmission systems corresponding to each polarization,
Propagation path estimating means (110) for estimating a propagation path state from a reference signal received by the reception system at two polarization planes,
The transmission system is
A branch circuit (17) for branching an information signal to be transmitted into two transmission systems;
Modulation means (18a, 18b) that divides the information signal of each branched transmission system corresponding to a plurality of carriers, modulates each carrier independently, and outputs the modulated signals as two systems;
From the two modulation signals output from the modulation means, a modulation signal that has a modulation signal in the frequency band of a carrier in one system but does not exist in the frequency band of the same carrier in another system is selected. Sorting means (111) to perform,
Connected to the output of the modulating means, and against the modulating signal said selecting means has selected, polarization control means for multiplying the compensation matrix corresponding to the channel matrix estimated by the channel estimation means (19) wireless communication system, wherein the obtaining Bei.   6. The wireless communication system according to claim 5, wherein the compensation matrix is a transposed inverse matrix of a propagation path matrix.

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