CN102946266B - Multiple-input and multiple-output reception device and multiple-input and multiple-output dispensing device - Google Patents

Multiple-input and multiple-output reception device and multiple-input and multiple-output dispensing device Download PDF

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CN102946266B
CN102946266B CN201210488199.8A CN201210488199A CN102946266B CN 102946266 B CN102946266 B CN 102946266B CN 201210488199 A CN201210488199 A CN 201210488199A CN 102946266 B CN102946266 B CN 102946266B
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cqi value
subflow
piece
value
relative
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CN102946266A (en
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段劲松
蛯子惠介
木村良平
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Optical Wireless Technology Co., Ltd.
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OPTICAL WIRELESS TECHNOLOGY Co Ltd
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Abstract

The radio communication device of the present invention includes：Receiving unit, using in Dividing in frequency domain continuously multiple subcarriers and form multiple pieces, receive the 1st data and the 2nd data that transmission is spatially multiplexed from multiple antennas；Computing unit, calculate each described piece of 1CQI value for the 1st data and each described piece of 2CQI value for the 2nd data, the 1CQI values and the 2CQI values in same described piece, relative value of the 2CQI values for the 1CQI values is calculated for each described piece；And transmitting element, send the 1CQI values in same described piece and the relative value.

Description

Multiple-input and multiple-output reception device and multiple-input and multiple-output dispensing device
The application is the divisional application of following patent application：The applying date is on April 21st, 2006, Application No. It is 200680054270.4 entitled《Multiple-input and multiple-output reception device and multiple-input and multiple-output dispensing device》.
Technical field
The present invention relates to MIMO (Multiple-Input Multiple-Out-put；Multiple-input and multiple-output) reception device With MIMO dispensing devices, more particularly to according to the feedback information from reception system, transmission system each antenna is transmitted The MIMO reception devices and MIMO dispensing devices of control.
Background technology
In 3GPP Long Term Evolution (LTE；Long Term Evolution) standardization in, MIMO (Multi are being discussed Input Multi Output) transmission one of PARC (Per Antenna Rate Control；Controlled per Antenna Rate) side Formula.In PARC, modulate corresponding with communication path quality (CQI) report value is selected to each transmission antenna (stream, stream) Coded system.As conventional MIMO PARC modes, have in the mode disclosed in non-patent literature 1.
Fig. 1 represents the knot for the MIMO transmitters being applicable in the MIMO communication system of above-mentioned conventional MIMO PARC modes Structure.As shown in the drawing, MIMO transmitters utilize several subcarriers to each antenna pilot signal transmitted.In contrast, receiving In generator terminal (not shown), the receiving intensity of each pilot signal from each antenna transmission of MIMO transmitters is measured, based on each The communication path situation of individual antenna, generates the CQI (communication path quality Indicator (designator)) of each antenna, and feeds back Give MIMO transmitters.CQI information of the MIMO transmitters based on each antenna, optimal modulation system is determined to each antenna (QPSK, 16QAM and 64QAM etc.) and encoding rate, subflow (sub-stream) is sent from each antenna.So, by based on every The communication path situation of individual antenna selects optimal modulation coding mode, can reach the Peak rate (peak rate) of maximum And message capacity.
[non-patent literature 1] 3GPP TSG-RAN Working Group 1Collection R1-010879, " Increasing MIMO throughput with per-antenna rate control”,Lucent Technologies
The content of the invention
The present invention needs to solve the problems, such as
However, the problem of following be present in above-mentioned conventional MIMO communication system, i.e., with antenna number (fluxion) into than Example, increase CQI feedback overhead (CQI feedback expense).In addition, when sending generator terminal progress frequency scheduling, due to The CQI of the i.e. each chunk (chunk) of each subcarrier block is needed, so the problem is more notable.
It is an object of the present invention to provide the MIMO that can be cut down feedback information volume and cut down the system traffic to receive dress Put and MIMO dispensing devices.
Solution to problem
Structure includes used by the MIMO reception devices of the present invention：Measurement of communication quality unit, using from transmitting terminal The pilot signal that each antenna is sent, measure the communication quality of each antenna；Transmitting element, by based on the communication quality Feedback information feeds back to the transmitting terminal；Relative value calculating part, based on the reference antenna in the antenna of the transmitting terminal The communication quality of communication quality and the antenna beyond the reference antenna, each antenna calculated beyond the reference antenna are relative The relative value of the communication quality of the reference antenna；And feedback information generation unit, from the communication quality of the reference antenna Absolute value and the communication quality relative value, generate the feedback information.
Structure includes used by the MIMO dispensing devices of the present invention：Receiving unit, receive feedback information, the feedback The relatively described reference antenna of each antenna beyond the absolute value and the reference antenna of communication quality of the packet containing reference antenna Communication quality relative value；Computing unit, the communication quality for each antenna is calculated based on the feedback information；And Control unit is sent, the transmission for each subflow that each antenna is passed through based on the communication quality calculated, control.
A kind of radio communication device of the present invention, including：Receiving unit, received for multiple pieces from using spatial reuse The pilot signal that multiple antennas for being transmitted are sent, the multiple piece by Dividing in frequency domain continuously multiple subcarriers and Form, wherein the receiving unit receives the first subflow and the second subflow sent from the multiple antenna；CQI determining sections, really Fixed each described piece 1CQI values and each described piece another CQI value, wherein the CQI determining sections are determined for described Each described piece of the 1CQI values and each described piece of another CQI value for the second subflow of first subflow；Relative values Calculation portion, the 1CQI values and another CQI value in same described piece, calculated for each described piece described another Relative value of one CQI value for the 1CQI values；And transmitting element, send the 1CQI values in same described piece With the relative value, wherein：Each described piece of the 1CQI values for first subflow are the first absolute cqi value； Each described piece of another CQI value for second subflow is the second absolute cqi value；Relative value calculating part calculates Relative cqi value of each described piece second absolute cqi value for first absolute cqi value；Wherein for for institute The first absolute cqi value stated in first piece in the multiple piece of the first subflow is calculated for the described of second subflow The relative cqi value of second absolute cqi value in first piece in multiple pieces, also, for for first subflow Second piece in the multiple piece calculates in the multiple piece of second subflow with first absolute cqi value The relative CQI values of the second absolute cqi value in second piece.
Another radio communication device of the present invention, including：Receiving unit, receive from using space and answer for multiple pieces The pilot signal sent with multiple antennas for being transmitted, the multiple piece by the continuous multiple subcarriers of Dividing in frequency domain And form, wherein the receiving unit receives the first subflow and the second subflow sent from the multiple antenna；CQI determining sections, It is determined that each described piece 1CQI values and each described piece another CQI value, wherein the CQI determining sections determine to be directed to institute State each described piece of 1CQI values of the first subflow and each described piece of another CQI value for the second subflow；Relative value Calculating part, for the 1CQI values in same described piece and another CQI value, use the side's with higher value CQI value calculates the relative value of the CQI value of the opposing party as benchmark；And transmitting element, send one CQI value and The relative value, wherein：Each described piece of the 1CQI values for first subflow are the first absolute cqi value；Pin Each described piece of another CQI value to second subflow is the second absolute cqi value；Relative value calculating part calculates every Relative cqi value of individual described piece of second absolute cqi value for first absolute cqi value；Wherein for for described The first absolute cqi value in first piece in the multiple piece of first subflow is calculated for the described more of second subflow The relative cqi value of second absolute cqi value in first piece in individual block, also, for the institute for first subflow State second piece in multiple pieces and first absolute cqi value is calculated for the in the multiple piece of second subflow The relative cqi value of the second absolute cqi value in two pieces.
Another radio communication device of the present invention, including：Receiving unit, receive from using space and answer for multiple pieces The pilot signal sent respectively with the multiple antennas being transmitted, the multiple piece by the continuous multiple pairs of Dividing in frequency domain Carrier wave and form, wherein the receiving unit receive from the multiple antenna send the first subflow and the second subflow；CQI is true Determine portion, it is determined that each described piece 1CQI values and each described piece another CQI value, wherein the CQI determining sections determine pin Each described piece of the 1CQI values to first subflow and each described piece of another CQI for second subflow Value；Relative value calculating part, for the 1CQI values in same described piece and another CQI value, use the CQI of a side Value calculates the relative value of the CQI value of the opposing party as benchmark；And transmitting element, send the CQI value of one and described Relative value, for each described piece, according to predetermined pattern, by the CQI value of one in 1CQI values and described another Changed between one CQI value, wherein：Each described piece of the 1CQI values for first subflow are the first absolute CQI Value；Each described piece of another CQI value for second subflow is the second absolute cqi value；Relative value calculating part meter Calculate relative CQI value of each described piece second absolute cqi value for first absolute cqi value；Wherein for for The absolute CQI values of first in first piece in the multiple piece of first subflow calculate the institute for second subflow The relative cqi value of second absolute cqi value in first piece in multiple pieces is stated, also, for for first subflow The multiple piece in second piece and first absolute cqi value calculate in the multiple piece of second subflow Second piece in the second absolute cqi value relative cqi value.
Another radio communication device of the present invention, including：Receiving unit, receive from the channel radio described in claim 4 The CQI value and the relative value that T unit is sent；Modulating unit, according to the CQI value that receives and described relative Value, modulate first pilot signal and another pilot signal each；And transmitting element, via using space The multiple antenna of multiplexing sends first pilot signal after modulation, wherein：For each institute of first subflow The 1CQI values for stating block are the first absolute cqi value；For each described piece of another CQI of second subflow Value is the second absolute cqi value；Relative value calculating part calculates each described piece second absolute cqi value for described first The relative cqi value of absolute cqi value；Wherein for first in first piece in the multiple piece for first subflow Absolute cqi value calculates the phase for second absolute cqi value in first piece in the multiple piece of second subflow To CQI value, also, for second piece in the multiple piece for first subflow and the first absolute cqi value meter Calculate the relative cqi value for the second absolute cqi value in second piece in the multiple piece of second subflow.
Another radio communication device of the present invention, including：Modulating unit, modulated pilots signal；Transmitting element, use By the way that in Dividing in frequency domain, continuously multiple subcarriers are and form multiple pieces, by the signal after modulation via multiple antennas in sky Between be multiplexed after be sent to reception device；And receiving unit, receive relative value and 1CQI values, the 1CQI values are determined For the first subflow of block, the relative value is the 1CQI values and another CQI value in same described piece Relative value calculating, for another CQI value that described piece of the second subflow determines for described piece of the 1CQI values, The modulating unit is modulated according to the CQI value and the relative value that receive, wherein：For the every of first subflow Individual described piece of the 1CQI values are the first absolute cqi value；It is described another for each described piece of second subflow CQI value is the second absolute cqi value；Relative value calculating part calculates each described piece of second absolute cqi value for described the The relative cqi value of one absolute cqi value；Wherein in first piece in the multiple piece for first subflow One absolute cqi value is calculated for second absolute cqi value in first piece in the multiple piece of second subflow Relative cqi value, also, for second piece in the multiple piece for first subflow and the described first absolute CQI Value calculates the relative cqi value for the second absolute cqi value in second piece in the multiple piece of second subflow.
Another radio communication device of the present invention, including：Modulating unit, modulated pilots signal；Transmitting element, use By the way that in Dividing in frequency domain, continuously multiple subcarriers are and form multiple pieces, by the signal after modulation via multiple antennas Reception device is sent to after spatial reuse, wherein the signal includes the first subflow and the second subflow；And receiving unit, Receive in same described piece for the 1CQI values of first subflow and in another CQI value of second subflow A side CQI value and the opposing party CQI value relative value, wherein use with higher value a side CQI value as benchmark To calculate the relative value of the CQI value of the opposing party, the modulating unit is adjusted according to the CQI value received and the relative value Signal processed, wherein：Each described piece of the 1CQI values for first subflow are the first absolute cqi value；For institute Another CQI value for stating each described piece of the second subflow is the second absolute cqi value；Relative value calculating part calculates each institute State relative cqi value of second absolute cqi value for first absolute cqi value of block；Wherein for for described first The first absolute cqi value in first piece in the multiple piece of subflow calculates the multiple piece for second subflow In first piece in second absolute cqi value relative cqi value, also, for for described in first subflow Second piece in multiple pieces calculates for second in the multiple piece of second subflow with first absolute cqi value The relative cqi value of the second absolute cqi value in block.
Another radio communication device of the present invention, including：Modulating unit, modulated pilots signal；Transmitting element, use By the way that in Dividing in frequency domain, continuously multiple subcarriers are and form multiple pieces, by the signal after modulation via multiple antennas in sky Between be multiplexed after be sent to reception device, wherein the signal includes the first subflow and the second subflow；And receiving unit, receive In same described piece for the 1CQI values of first subflow and for one in another CQI value of second subflow Side CQI value and the opposing party CQI values relative value, wherein using a side CQI value as benchmark the opposing party CQI Value, the modulating unit is according to the CQI value and the relative value modulated signal received, for each described piece, root According to predetermined pattern, by the CQI value of one in the 1CQI values and another CQI value
The wireless communications method of the present invention, including：Using by the way that in Dividing in frequency domain, continuously multiple subcarriers are formed Multiple pieces, the pilot signal for using spatial reuse to send via multiple antennas is received, receives the sent from the multiple antenna One subflow and the second subflow；Calculate for each described piece of 1CQI values of first subflow and for the second subflow Each described piece another CQI value；The 1CQI values and another CQI value in same described piece, for each Described piece calculates relative value of another CQI value for the 1CQI values；And send it is same in described piece described the 1CQI values and the relative value, wherein：Each described piece of the 1CQI values for first subflow are first exhausted To CQI value；Each described piece of another CQI value for second subflow is the second absolute cqi value；Relative values Calculation portion calculates relative cqi value of each described piece second absolute cqi value for first absolute cqi value；It is wherein right The first absolute cqi value in first piece in the multiple piece for first subflow is calculated for the described second son The relative cqi value of second absolute cqi value in first piece in the multiple piece of stream, also, for for described the Second piece in the multiple piece of one subflow calculates for the described more of second subflow with first absolute cqi value The relative cqi value of the second absolute cqi value in second piece in individual block.
Another wireless communications method of the present invention, including：Modulated pilots signal；Using by continuous in Dividing in frequency domain Multiple subcarriers and form multiple pieces, the signal after modulation is sent to via multiple antennas after spatial reuse Reception device, wherein the signal includes the first subflow and the second subflow；And receive relative value and 1CQI values, the phase To value be 1CQI values in same described piece and another CQI value calculates, it is each described piece for the described second son Relative value of another CQI value of stream for the 1CQI values for first subflow；According to the CQI value that receives and The relative value is modulated, wherein：Each described piece of the 1CQI values for first subflow are first exhausted To CQI value；Each described piece of another CQI value for second subflow is the second absolute cqi value；Relative values Calculation portion calculates each described piece of second absolute cqi value for described the
The effect of invention
In accordance with the invention it is possible to provide can cut down feedback information volume and cut down the system traffic MIMO reception devices and MIMO dispensing devices.
Brief description of the drawings
Fig. 1 is the block diagram for the structure for representing conventional MIMO dispensing devices.
Fig. 2 is the block diagram of the structure of the radio receiver for the reception system for representing embodiments of the present invention 1.
Fig. 3 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 1.
Fig. 4 is the figure for illustrating the feedback information of embodiment 1.
Fig. 5 is the block diagram of the structure of the radio communication device for the reception system for representing embodiment 2.
Fig. 6 is the figure for illustrating the feedback information of embodiment 2.
Fig. 7 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 2.
Fig. 8 is the block diagram of the structure of the radio communication device for the reception system for representing embodiment 3.
Fig. 9 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 3.
Figure 10 is the figure for illustrating the feedback information of embodiment 3.
Figure 11 is the block diagram of the structure of the radio communication device for the reception system for representing embodiment 4.
Figure 12 is the figure for illustrating the feedback information of embodiment 4.
Figure 13 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 4.
Figure 14 is the block diagram of the structure of the radio communication device for the reception system for representing embodiment 5.
Figure 15 is the figure for illustrating the feedback information of embodiment 5.
Figure 16 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 5.
Figure 17 is the block diagram of the structure of the radio communication device for the reception system for representing embodiment 6.
Figure 18 is the figure for illustrating the feedback information of embodiment 6.
Figure 19 is the block diagram of the structure of the radio communication device for the transmission system for representing embodiment 6.
Embodiment
Embodiments of the present invention are explained referring to the drawings.In addition, in embodiments, to identical structure Identical label is assigned into key element, and is omitted to its repeat specification.
(embodiment 1)
It is as shown in Fig. 2 wireless in MIMO (Multi Input Multi Output) communication system of embodiment 1 Communicator 100 has multiple antennas, receiving unit 110, signal separation unit 120, reception level measurement unit 130, CQI Determining means 140, relative value calculating part 150, feedback information generation unit 160, transmitting element 170, demodulating unit 175, solution Code unit 180 and P/S converter units 185.
Receiving unit 110 has receiving unit 112 equal number of with antenna, receives from the hair in MIMO communication system The space division multiplex signal that the signal for sending system to send is space division multiplexi, and wireless receiving processing is carried out to reception signal.From hair When the transmission signal for sending each antenna of system to send is a kind of ofdm signal as multi-carrier signal, receiving unit 110 In addition to carrying out in general wireless receiving processing (down coversion and A/D conversion process etc.), FFT processing and P/S conversion are also carried out The OFDM reception processings such as processing.In addition, receiving unit 110 receives the pilot signal sent from each antenna of the system of transmission, and Carry out reception processing.
Signal separation unit 120 utilizes MMSE (Minimum Mean Square Error；Least mean-square error) etc. side Method, it is the signal sent from each antenna of the system of transmission by the Signal separator after the wireless receiving processing of receiving unit 110 (equivalent to the subflow in transmission system, hereinafter sometimes referred to " subflow ").In addition, the input receiving unit of signal separation unit 120 Pilot signal after 110 reception processing, the pilot signal for each antenna for being used in output transmission system send is (with transmission Each subflow in system is corresponding).
Receive level measurement unit 130 measure by signal separation unit 120 it is isolating, send system each antenna Each pilot signal reception level (for example, SINR：Signal-to-Interference and Noise power Ratio；Signal and interference-to-noise ratio), and the reception level of each pilot signal is output to CQI determining meanss 140.
CQI determining meanss 140 remain CQI tables, based on each pilot tone measured by reception level measurement unit 130 The reception level of signal, determines the CQI value for each subflow.
The CQI value of the CQI value of the calculating benchmark subflow of relative value calculating part 150 and each subflow beyond benchmark subflow Between CQI relative values.In the present embodiment, benchmark subflow is determined in advance, is fixed.In addition, subflow and transmission Each antenna of system is corresponding, so both it is contemplated that benchmark subflow is " reference antenna ", it is also contemplated that relative value calculating part The CQI relative values between CQI value beyond the CQI value and reference antenna of 150 calculating benchmark antennas.
Feedback information generation unit 160 is generated for sending the anti-of system from the CQI value and CQI relative values of benchmark subflow Feedforward information, the CQI relative values are the values obtained to each stream beyond benchmark subflow.
Transmitting element 170 will be fed back using at least one antenna in multiple antennas of radio communication device 100 is arranged on The feedback information that information generating unit 160 is generated is sent to transmission system.That is, transmitting element 170 both can be by making Transmission system is sent to the communication mode of an antenna, MIMO communication modes or space-time code communication mode etc. can be passed through again Multi-antenna communication mode is sent to transmission system.
Demodulating unit 175 has demodulating unit 177 corresponding with subflow number, to what is isolated by signal separation unit 120 Each subflow is demodulated processing.
Decoding unit 180 has decoding unit 182 corresponding with subflow number, and each subflow after demodulation process is carried out Decoding process.
P/S converter units 185 carry out parallel serial conversion to the subflow after decoding process, and defeated as serial data row Go out.
As shown in figure 3, the system of transmission, which is radio communication device 200, has multiple antennas, receiving unit 210, feedback information Processing unit 220, send control unit 230, S/P converter units 240, coding unit 250, modulating unit 260, transmitting element 270 and pilot generation unit 280.
Receiving unit 210 in the antenna by radio communication device 200 at least one antenna receive, from nothing The feedback information of line communicator 100 carries out wireless receiving processing.Specifically, receiving unit 210 by with radio communication Reception mode corresponding to the sending method being applicable in the transmitting element 170 of device 100 carries out the reception processing of feedback information, And the feedback information after reception processing is output to feedback information processing unit 220.
Feedback information processing unit 220 calculates the CQI of each subflow based on the feedback information from receiving unit 210 Value.Specifically, as described above, including the CQI value of benchmark subflow in the feedback information from radio communication device 100 With the CQI relative values obtained to each subflow beyond benchmark subflow, so feedback information processing unit 220 be based on benchmark The CQI value of stream and the CQI relative values obtained to each subflow beyond benchmark subflow, calculate the CQI value of each subflow.
Send control unit 230 and remain the CQI table same with radio communication device 100, by encoding rate and modulation system Etc. being output to coding unit 250 and modulating unit 260, the encoding rate and modulation system etc. with by feedback information processing unit The CQI value of the 220 each subflows calculated is corresponding.
S/P converter units 240 carry out serial to parallel conversion to the transmission data (flow data) to be inputted, and are divided into multiple subflows.
Coding unit 250 has coding unit 252 corresponding with subflow number, based on what is received from transmission control unit 230 The encoding rate of each subflow, coded treatment is carried out to each subflow.
Modulating unit 260 has modulating unit 262 corresponding with subflow number, based on what is received from transmission control unit 230 The modulation system (QPSK, 16QAM and 64QAM etc.) of each subflow, processing is modulated to each subflow.In addition, modulating unit The pilot signal that 260 pairs of pilot generation units 280 are generated is modulated processing.In addition, in radio communication device 200 from each When individual antenna sends ofdm signal, modulating unit 260 also carries out the OFDM modulation treatments such as S/P conversion process and IFFT processing.
Transmitting element 270 has transmitting element 272 corresponding with subflow number, and each subflow is carried out wirelessly to handle (D/A Conversion and up-conversion etc.), and sent from corresponding each antenna.In addition, transmitting element 270 by modulating unit 260 to being adjusted The pilot signal of system processing is wirelessly handled, and is sent from corresponding each antenna.
Then, the action of radio communication device 100 and radio communication device 200 with said structure is illustrated.
In radio communication device 100, the signal after the reception processing of receiving unit 110 passes through in signal separation unit 120 are separated into subflow using the methods of MMSE (Minimum Mean Square Error).
In level measurement unit 130 is received, measure isolating, transmission system each by signal separation unit 120 The reception level of each pilot signal of antenna.Specifically, pilot tone is being sent from each antenna of radio communication device 200 When signal is as ofdm signal, receives level measurement unit 130 and each chunk of each pilot signal measurement (chunk) is connect Level is received, " average reception level " that all chunks average will be output between CQI report cycle CQI determining meanss 140.Here, " chunk (chunk) " generally means that the beam in the continuous subcarrier of frequency direction.
In CQI determining meanss 140, based on from the " average of each pilot signal for receiving level measurement unit 130 Receive level ", the CQI value for each subflow is determined, and in relative value calculating part 150, the CQI of calculating benchmark subflow CQI relative values between the CQI value of each subflow beyond value and benchmark subflow.
In feedback information generation unit 160, generated from the CQI value and CQI relative values of benchmark subflow for sending system Feedback information, the CQI relative values are the values obtained to each subflow beyond benchmark subflow.
Reference picture 4 illustrates the feedback information that the feedback information generation unit 160 is generated.
As shown in the drawing, on benchmark subflow, based on being put down to all chunks (in the figure, being chunk 1~8) The CQI value that " average reception level " of homogenizing is determined, radio communication device 200 is fed back in each CQI cycle. In addition, on each subflow (in the figure, being expressed as other subflows) beyond benchmark subflow, to be determined to benchmark subflow CQI relative value of the CQI value as benchmark, be fed back to radio communication device 200 in each CQI cycle.
So, the CQI value of benchmark subflow is only set to absolute value and is set to the CQI value of other subflows and benchmark Relative value between the CQI value of stream generates feedback information, so as to all feeding back the absolute of CQI value for whole subflows in the past The situation of value is compared, and can cut down feedback information volume.As a result, the traffic in MIMO communication system can be cut down.In MIMO The antenna number for being loaded into radio communication device in communication system more increases, and the effect is more notable.
In radio communication device 200, reception processing is carried out to feedback information by receiving unit 210, by feedback information Manage the CQI value that unit 220 calculates each subflow based on the feedback information from receiving unit 210.
In control unit 230 is sent, with the CQI value pair of each subflow calculated by feedback information processing unit 220 The encoding rate answered and modulation system etc. are output to coding unit 250 and modulating unit 260.
In coding unit 250, based on the encoding rate from each subflow for sending the receiving of control unit 230, to each height Stream carries out coded treatment.
In modulating unit 260, based on from send control unit 230 receive each subflow modulation system (QPSK, 16QAM and 64QAM etc.), processing is modulated to each subflow.
So, according to embodiment 1, it is provided with radio communication device 100：Level measurement unit 130 is received, is made For measurement of communication quality unit, the pilot signal measurement sent from each antenna of transmitting terminal (radio communication device 200) is used The communication quality (for example, SINR) of each antenna (corresponding with subflow)；Transmitting element 170, by based on the anti-of the communication quality Feedforward information feeds back to the transmitting terminal；Relative value calculating part 150, as relative value calculating part, based in the transmitting terminal Antenna in reference antenna (corresponding with benchmark subflow) communication quality and the reference antenna beyond antenna communication matter Measure, the relative value of the communication quality of each antenna beyond the reference antenna of the relatively described reference antenna of calculating；And feedback Information generating unit 160, as feedback information generation unit, from the absolute value of the communication quality of the reference antenna and described The relative value of communication quality generates the feedback information.
Thus, only by the communication quality of reference antenna be set to absolute value and by the communication quality of other antennas be set to Relative value between the communication quality of reference antenna generates feedback information, so as to all feeding back CQI for whole antennas in the past The situation of the absolute value of value is compared, and can cut down feedback information volume.As a result, the control in MIMO communication system can be cut down Information channel amount of overhead and jamming power caused by it.The antenna for being loaded into radio communication device in MIMO communication system Number more increases, and the effect is more notable.
In addition, it is provided with radio communication device 100：Level measurement unit 130 is received, is measured (wireless from transmitting terminal Communicator 200) each antenna send each pilot signal reception level；CQI determining meanss 140, connect based on described Level is received, determines the CQI value of each antenna of the transmitting terminal；Relative value calculating part 150, based on CQI determining meanss 140 The CQI value that is determined in the antenna of the transmitting terminal by CQI determining meanss to reference antenna and to the reference antenna with The CQI value that outer antenna determines, calculate the CQI of each antenna beyond the reference antenna for representing relatively described reference antenna The CQI relative values of the relative value of value；And feedback information generation unit 160, generation comprising the reference antenna CQI value and The CQI relative values, feedback information for the transmitting terminal.
Thus, the CQI of reference antenna is only set to absolute value and is set to the CQI of other antennas and reference antenna Relative value between CQI generates feedback information, so as to the feelings for the absolute value for all feeding back CQI value for whole antennas in the past Shape is compared, and can cut down feedback information volume.As a result, the control information channel overhead amount in MIMO communication system can be cut down With jamming power caused by it.The antenna number for being loaded into radio communication device in MIMO communication system more increases, the effect It is more notable.In addition, be used for the generation of feedback information by the CQI value that also utilizes conventional system, can will the present invention directly Suitable for conventional system.
In addition, according to embodiment 1, it is provided with radio communication device 200：Receiving unit 210, it is single as receiving Member receives feedback information, and the feedback information includes the communication quality of reference antenna (corresponding with benchmark subflow) (for example, CQI Value) absolute value and relatively described reference antenna the reference antenna beyond each antenna communication quality relative value；Instead Feedforward information processing unit 220, as computing unit, the communication quality for each antenna is calculated based on the feedback information；With And control unit 230 is sent, as control unit is sent, based on the communication quality calculated, control passes through each antenna Each subflow transmission.
Thereby, it is possible to cut down the control information channel overhead amount in MIMO communication system and jamming power caused by it, and Carry out the transmission control of subflow sent from each antenna.
(embodiment 2)
In embodiment 1, the CQI value of each subflow is fed back.In contrast, in embodiment 2, to be from transmission Premised on each antenna of system sends the MIMO communication modes of multi-carrier signal (for example, ofdm signal), feed back on each height The CQI value of each chunk (chunk) of stream.In addition, benchmark subflow is fed back with the absolute value of CQI value, and to benchmark Each subflow beyond stream is fed back with CQI relative values, and this point is identical with embodiment 1.So, by feedback on The CQI value of each chunk of each subflow, can efficiently carry out for control utilized in transmission system it is subcarrier, So-called frequency scheduling.
As shown in figure 5, the radio communication device 300 of embodiment 2, which has, receives level measurement unit 330, CQI decisions Unit 340, relative value calculating part 350 and feedback information generation unit 360.
Level measurement unit 330 is received to measure on isolating, transmission system each by signal separation unit 120 The reception level (for example, SINR) of each chunk of each pilot signal of antenna.
CQI determining meanss 340 are based on from reception level measurement unit 330, on each pilot signal each group The reception level of block, determine the CQI value of each chunk on each subflow.
The CQI value of the CQI value of the calculating benchmark subflow of relative value calculating part 350 and each subflow beyond benchmark subflow Between, the CQI relative values (following, sometimes referred to as " chunk CQI relative values ") of each chunk.In the present embodiment, benchmark Subflow is determined in advance, is fixed.
Feedback information generation unit 360 is given birth to from the CQI value and chunk CQI relative values of each chunk on benchmark subflow In pairs in the feedback information (reference picture 6) of the system of transmission, the chunk CQI relative values are to each height beyond benchmark subflow The value that stream is obtained.
Controlled as shown in fig. 7, the radio communication device 400 of the system of transmission has feedback information processing unit 420 and sent Unit 430.
Feedback information processing unit 420 is calculated on each subflow based on the feedback information from receiving unit 210 The CQI value of each chunk.Specifically, as described above, comprising relevant in the feedback information from radio communication device 300 CQI value and the chunk CQI relative values obtained to each stream beyond benchmark subflow in each chunk of benchmark subflow, so CQI value of the feedback information processing unit 420 based on each chunk on benchmark subflow and to each stream beyond benchmark subflow The chunk CQI relative values obtained, calculate the CQI value of each chunk on each subflow.
Control unit 430 is sent based on each chunk from feedback information processing unit 420, on each subflow CQI value, to each subflow carry out frequency scheduling, the frequency schedule information of each subflow is output to modulating unit 260.
Modulating unit 260 is sequentially changed for per height based on from the frequency schedule information for sending control unit 430 The subcarrier of stream.
So, according to embodiment 2, it is provided with radio communication device 300：Level measurement unit 330 is received, is surveyed Measure the reception level of each pilot signal sent from each antenna of transmitting terminal (radio communication device 400)；CQI determines single Member 340, based on the reception level, determine the CQI value of each antenna of the transmitting terminal；Relative value calculating part 350, base The CQI value that is determined in the antenna in the transmitting terminal by CQI determining meanss 340 to reference antenna and to the benchmark day The CQI value that antenna beyond line determines, calculating represent each antenna beyond the reference antenna of relatively described reference antenna The CQI relative values of the relative value of CQI value；And feedback information generation unit 360, generation include the CQI value of the reference antenna With the CQI relative values, feedback information for the transmitting terminal, level measurement unit 330 is received to by multiple subcarriers The each chunk formed measures the reception level, and CQI determining meanss 340 are based on the reception level, determined on the hair The CQI value of each chunk of each antenna of sending end, relative value calculating part 350 to the reference antenna based on being determined The each CQI value of chunk and the CQI value of each chunk determined to the antenna beyond the antenna, calculate and represent relative institute The chunk CQI relative values of the relative value of the CQI value of each chunk of the antenna beyond the reference antenna of reference antenna are stated, instead The CQI values and the chunk CQI relative values of each chunk of the generation of feedforward information generation unit 360 comprising the reference antenna Feedback information.
Thus, the CQI value of each chunk on each antenna is fed back, so as to efficiently carry out being used for controlling Subcarrier, the so-called frequency scheduling utilized in transmission system.
(embodiment 3)
In embodiment 1, benchmark subflow is fixed.In contrast, in embodiment 3, in each report cycle The optimal subflow of communication quality is selected as benchmark subflow.In addition, benchmark subflow is fed back with the absolute value of CQI value, and Each subflow beyond benchmark subflow is fed back with CQI relative values, this point is identical with embodiment 1.So, select The optimal subflow of communication quality as benchmark subflow, feed back absolute value and the benchmark subflow of the communication quality of the benchmark subflow with The relative value of the communication quality of outer subflow, thus it is improved particularly the CQI feedback letter of the optimal subflow of transmission path communication quality The reliability of breath.As a result, in the transmission system of feedback information is received, can be carried out based on the high feedback information of reliability Control is sent, so handling capacity that can be in raising system.
As shown in figure 8, there is the radio communication device 500 of embodiment 3 benchmark decision unit 510, relative value to calculate list Member 550 and feedback information generation unit 560.
Benchmark decision unit 510 inputs CQI values from CQI determining meanss 140, for each subflow, determines benchmark Subflow.Specifically, benchmark decision unit 510 selects the CQI value maximum with receiving level corresponding in each CQI cycle Subflow as benchmark subflow.That is, benchmark decision unit 510 is based on receiving lever selection benchmark subflow.Then, base Information (following, sometimes referred to as " benchmark sub-stream information ") for determining benchmark subflow is output to phase by quasi- determining means 510 To value computing unit 550 and feedback information generation unit 560.
The CQI value of benchmark subflow selected by the calculating benchmark determining means 510 of relative value calculating part 550 and benchmark CQI relative values between the CQI value of each subflow beyond stream.
Feedback information generation unit 560 from the CQI value, CQI relative values and benchmark sub-stream information of benchmark subflow (for example, with In identification benchmark subflow stream index (subflow index) information) generation for transmission system feedback information, it is described CQI relative values are the values obtained to each stream beyond benchmark subflow.
As shown in figure 9, radio communication device 600 has feedback information processing unit 620.
Feedback information processing unit 620 calculates the CQI of each subflow based on the feedback information from receiving unit 210 Value.Specifically, as described above, including the CQI value of benchmark subflow in the feedback information from radio communication device 500 With each stream beyond benchmark subflow is obtained CQI relative values and benchmark sub-stream information (for example, for identify benchmark The stream index information of stream), so feedback information processing unit 620 is based on determined from benchmark sub-stream information, benchmark The CQI value of stream and the CQI relative values obtained to each stream beyond benchmark subflow, calculate the CQI value of each subflow.
Then, the action of radio communication device 500 and radio communication device 600 with said structure is illustrated.
In benchmark decision unit 510, input has CQI value from CQI determining meanss 140, for each subflow, Determine benchmark subflow.Specifically, in benchmark decision unit 510, in each CQI report cycle selections with receiving level most Subflow is as benchmark subflow corresponding to big CQI value.That is, in benchmark decision unit 510, selected based on level is received Select benchmark subflow.
In relative value calculating part 550, the CQI value and base of the benchmark subflow selected by calculating benchmark determining means 510 CQI relative values between the CQI value of each subflow beyond quasi- subflow.
In feedback information generation unit 560, CQI value, CQI relative values and the life of benchmark sub-stream information from benchmark subflow In pairs in the feedback information of the system of transmission, the CQI relative values are the values obtained to each stream beyond benchmark subflow.
Reference picture 10 illustrates the feedback information that the feedback information generation unit 560 is generated.In the figure, in order to simple Ground illustrates, represents the situation that subflow number is two.
As shown in the drawing, subflow conduct corresponding with the CQI value for receiving level maximum is selected in each CQI cycle Benchmark subflow.Then, the benchmark subflow on each CQI cycle, based on (in the figure, being chunk to all chunks 1~8) the CQI values that " average reception level " averaged is determined, channel radio is fed back in each CQI cycle T unit 600.In addition, on each subflow beyond benchmark subflow, determined with the benchmark subflow to each CQI cycle CQI relative value of the fixed CQI value as benchmark, is fed back to radio communication device 600.In the figure, at first and second CQI cycle subflow 1 is selected as benchmark subflow, and is selected as benchmark in the 3rd CQI cycle subflow 2 Subflow.Then, it is although not shown in the figure, as described above, each CQI report the cycle in benchmark sub-stream information also by Feedback.
In addition, it is respectively provided with transmission system and reception system in two antennas, so-called 2 × 2MIMO communication systems, base Quasi- sub-stream information (for example, stream index information for identifying benchmark subflow) is only 1 bit, and 4 × 2 bits are also only in 4MIMO communication systems.
In radio communication device 600, by feedback information processing unit 620 based on the feedback letter from receiving unit 210 Breath, calculate the CQI value of each subflow.Specifically, as described above, being wrapped in the feedback information from radio communication device 500 CQI value containing benchmark subflow and the CQI relative values obtained to each stream beyond benchmark subflow and benchmark sub-stream information, So in feedback information processing unit 620, based on CQI value determined from benchmark sub-stream information, benchmark subflow and to benchmark The CQI relative values that each stream beyond subflow is obtained, calculate the CQI value of each subflow.
So, according to embodiment 3, in radio communication device 500, benchmark decision unit 510 is provided with, based on CQI The CQI value that determining means 140 is determined, reference antenna is selected from the antenna of transmitting terminal (radio communication device 600) (with base Quasi- subflow is corresponding), wherein, relative value calculating part 550 is determined based on the reference antenna to being selected by benchmark decision unit 510 Fixed CQI value and the CQI value determined to the antenna beyond the reference antenna, calculate CQI relative values.Especially, benchmark Determining means 510 selects the maximum antenna of CQI value as reference antenna.
Thus, the optimal antenna of communication quality (for example, SINR) is selected to feed back the reference antenna as reference antenna Relative value (the CQI phases of the communication quality of antenna beyond the absolute value (absolute value of CQI value) and reference antenna of communication quality To value), thus it is improved particularly the reliability of the CQI feedback information of the optimal subflow of transmission path communication quality.As a result, In the transmission system for receiving feedback information, control can be transmitted based on the high feedback information of reliability, so can improve Handling capacity in system.
(embodiment 4)
In embodiment 2, benchmark subflow is fixed in all chunks.In contrast, in embodiment 4, The subflow for selecting communication quality optimal using in units of each chunk is used as benchmark subflow.In addition, to benchmark subflow with CQI value Absolute value is fed back, and each subflow beyond benchmark subflow is fed back with CQI relative values, this point and embodiment party Formula 1 is identical.So, the optimal subflow of communication quality is selected to feed back benchmark as benchmark subflow using in units of each chunk The relative value of the communication quality of subflow beyond the absolute value and benchmark subflow of the communication quality of stream, thus improves feedback information Reliability.In addition, the communication quality by feeding back each chunk on each subflow, can be efficiently in the system of transmission Middle carry out frequency scheduling.As a result, in the transmission system of feedback information is received, reliability height can be based on and comprising every The feedback information of the communication quality of individual chunk is transmitted control, so handling capacity that can be in raising system.
As shown in figure 11, there is the radio communication device 700 of embodiment 4 benchmark decision unit 710, relative value to calculate Unit 750 and feedback information generation unit 760.
Benchmark decision unit 710 inputs the CQI of each chunk from CQI determining meanss 340, on each subflow Value, determine the benchmark subflow of each chunk.Specifically, benchmark decision unit 710 is selected with receiving level most each chunk Subflow is as benchmark subflow corresponding to big CQI value.That is, reception electricity of the benchmark decision unit 710 based on each chunk The benchmark subflow of the flat each chunk of selection.Then, benchmark decision unit 710 is by the benchmark subflow for determining each chunk Information (following, sometimes referred to as " chunk benchmark sub-stream information "), is output to relative value calculating part 750 and feedback information generation Unit 760.
The CQI value of benchmark subflow selected by the calculating benchmark determining means 710 of relative value calculating part 750 and benchmark The CQI relative values of chunk between the CQI value of each subflow beyond stream, each are chunk CQI relative values.
CQI value, chunk CQI relative value and chunk base of the feedback information generation unit 760 from the benchmark subflow of each chunk For the feedback information (reference picture 12) of transmission system, the chunk CQI relative values are to each chunk for quasi- sub-stream information generation Benchmark subflow beyond the value obtained of each stream.
As shown in figure 13, radio communication device 800 has feedback information processing unit 820.
Feedback information processing unit 820 is calculated on each of subflow based on the feedback information from receiving unit 210 The CQI value of chunk.Specifically, as described above, including each group in the feedback information from radio communication device 700 The CQI value of the benchmark subflow of block and the chunk CQI relative values obtained to each stream beyond the benchmark subflow of each chunk and Chunk benchmark sub-stream information, thus feedback information processing unit 820 based on it is being determined from chunk benchmark sub-stream information, each group The CQI value of the benchmark subflow of block and the chunk CQI relative values obtained to each stream beyond benchmark subflow, are calculated on each The CQI value of each chunk of subflow.
So, according to embodiment 4, benchmark decision unit 710 is provided with radio communication device 700, based on CQI The CQI value of each chunk of each antenna determined, on transmitting terminal (radio communication device 800) of determining means 340, Reference antenna is selected from the antenna of the transmitting terminal to the chunk, wherein, relative value calculating part 750 is from described each The CQI value of each chunk of antenna beyond the CQI value of the reference antenna of chunk and the reference antenna, calculate relatively described The chunk CQI relative values of each chunk of antenna beyond the reference antenna of reference antenna, feedback information generation unit 760 Feedback information is generated, it is relative that the feedback information includes the CQI value of the reference antenna of each chunk, the chunk CQI The identification information of the reference antenna of value and each chunk.Especially, benchmark decision unit 710 selects CQI value to each chunk Maximum antenna is as reference antenna.
Thus, select each chunk the optimal antenna of communication quality (for example, SINR) should as reference antenna, feedback The phase of the communication quality of subflow beyond the absolute value (absolute value of CQI value) and benchmark subflow of the communication quality of reference antenna It is anti-so as to especially improve the CQI of the optimal subflow of transmission path communication quality to each chunk to being worth (chunk CQI relative values) The reliability of feedforward information.In addition, the communication quality by feeding back each chunk on each antenna, can efficiently send out Send and frequency scheduling is carried out in system.As a result, in the transmission system of feedback information is received, can be based on reliability it is high and The feedback information of communication quality comprising each chunk is transmitted control, so handling capacity that can be in raising system.
(embodiment 5)
In embodiment 1, benchmark subflow is fixed.In contrast, in embodiment 5, according to the pattern of regulation To each report periodic change benchmark subflow.In addition, benchmark subflow is fed back with the absolute value of CQI value, and to benchmark Each subflow beyond stream is fed back with CQI relative values, and this point is identical with embodiment 1.So, according to the figure of regulation Case changes benchmark subflow to each specified period, feeds back beyond absolute value and the benchmark subflow of the communication quality of the benchmark subflow Subflow communication quality relative value, so as to balancedly keep the reliability of feedback information.As a result, receiving instead In the transmission system of feedforward information, control can be transmitted based on the feedback information for maintaining reliability, so can improve Handling capacity in system.
As shown in figure 14, the radio communication device 900 of embodiment 5 has relative value calculating part 950.
Relative value calculating part 950, to each CQI periodic change benchmark subflow, calculates base according to the pattern of regulation CQI relative values between the CQI value of each subflow beyond the CQI value and benchmark subflow of quasi- subflow.
Then, in feedback information generation unit 160, from the CQI value of the benchmark subflow in each CQI cycle with it is every CQI relative values between the CQI value of each subflow beyond the benchmark subflow in individual CQI cycle, are generated for transmission system Feedback information.
In fig.15, represent what benchmark subflow was changed mutually to each CQI cycle between subflow 1 and subflow 2 The feedback information of situation.
As shown in figure 16, the radio communication device 1000 of embodiment 5 has feedback information processing unit 1020.
Feedback information processing unit 1020 calculates the CQI of each subflow based on the feedback information from receiving unit 210 Value.Specifically, as described above, including each CQI cycle in the feedback information from radio communication device 900 Benchmark subflow CQI value and the CQI relative values obtained to each subflow beyond the benchmark subflow in each CQI cycle, So the CQI value of benchmark subflow of the feedback information processing unit 1020 based on each CQI cycle and to each CQI The CQI relative values that each subflow beyond the benchmark subflow in cycle is obtained, calculate each CQI week on each subflow The CQI value of phase.
In addition, feedback information processing unit 1020 must determine benchmark subflow to calculate CQI value, if but obtaining in advance The change pattern of benchmark subflow in the relative value calculating part 950 of radio communication device 900, then can calculate each subflow CQI value.If the change pattern of benchmark subflow is determined in advance by transmitting terminal and receiving terminal, without the need for notice benchmark subflow Identification Signaling (signaling).
So, according to embodiment 5, it is set as the relative value calculating part 950 of radio communication device 900 according to advance The change pattern of the reference antenna of decision, the reference antenna is sequentially changed, calculate CQI relative values.
Thus, reference antenna is changed according to the change pattern of regulation, feeds back the absolute value of the communication quality of the reference antenna The relative value (CQI relative values) of the communication quality of antenna beyond (absolute value of CQI value) and reference antenna, so as to equal Weighing apparatus ground keeps the reliability of feedback information.As a result, in the transmission system of feedback information is received, can be based on maintaining can Control is transmitted by the feedback information of degree, so handling capacity that can be in raising system.
(embodiment 6)
In embodiment 2, benchmark subflow is fixed in all chunks.In contrast, in embodiment 6, Benchmark subflow is changed to each chunk according to the pattern of regulation.In addition, benchmark subflow is fed back with the absolute value of CQI value, And each subflow beyond benchmark subflow is fed back with CQI relative values, this point is identical with embodiment 1.So, root Benchmark subflow is changed to each chunk according to defined pattern, feeds back the absolute value and benchmark of the communication quality of the benchmark subflow The relative value of the communication quality of subflow beyond stream, so as to balancedly keep the reliability of feedback information.In addition, pass through The communication quality of each chunk on each subflow is fed back, frequency scheduling can be efficiently carried out in transmission system.Its As a result, can be based on maintaining reliability and communication matter comprising each chunk in the transmission system of feedback information is received The feedback information of amount is transmitted control, so handling capacity that can be in raising system.
As shown in figure 17, the radio communication device 1100 of embodiment 6 has relative value calculating part 1150.
Relative value calculating part 1150 changes benchmark subflow, calculating benchmark subflow according to the pattern of regulation to each chunk CQI value and the CQI value of each subflow beyond benchmark subflow between, the CQI relative values of each chunk be chunk CQI phases To value.
Then, in feedback information generation unit 360, CQI value and each chunk from the benchmark subflow of each chunk CQI relative values between the CQI value of each subflow beyond benchmark subflow, generate the feedback information for sending system.
In figure 18, the situation that benchmark subflow is changed mutually to each chunk between subflow 1 and subflow 2 is represented Feedback information.
As shown in figure 19, the radio communication device 1200 of embodiment 6 has feedback information processing unit 1220.
Feedback information processing unit 1220 is calculated on each of subflow based on the feedback information from receiving unit 210 The CQI value of chunk.Specifically, as described above, including each group in the feedback information from radio communication device 1100 The CQI value of the benchmark subflow of block and the chunk CQI relative values obtained to each subflow beyond the benchmark subflow of each chunk, So the CQI value and the benchmark subflow to each chunk of benchmark subflow of the feedback information processing unit 1220 based on each chunk The chunk CQI relative values that each subflow in addition is obtained, calculate the CQI value of each chunk on each subflow.
In addition, feedback information processing unit 1220 is to calculate the benchmark subflow that CQI value must determine each chunk, but If the Altered Graphs of the benchmark subflow of each chunk in the relative value calculating part 1150 of radio communication device 1100 are obtained in advance Case, then it can calculate the CQI value of each chunk on each subflow.If benchmark is determined in advance by transmitting terminal and receiving terminal The change pattern of stream, then without the need for the identification Signaling (signaling) of notice benchmark subflow.
So, according to embodiment 6, it is provided with radio communication device 1100：Level measurement unit 330 is received, is surveyed Measure the reception level of each pilot signal sent from each antenna of transmitting terminal (radio communication device 1200)；CQI determines single Member 340, based on the reception level, determine the CQI value of each antenna of the transmitting terminal；Relative value calculating part 1150, base The CQI value that is determined in the antenna in the transmitting terminal by CQI determining meanss 340 to reference antenna and to the benchmark day The CQI value that antenna beyond line determines, calculating represent each antenna beyond the reference antenna of relatively described reference antenna The CQI relative values of the relative value of CQI value；And feedback information generation unit 360, generation include the CQI value of the reference antenna With the CQI relative values, feedback information for the transmitting terminal, wherein, receive level measurement unit 330 to by multiple Each chunk that subcarrier is formed measures the reception level, and CQI determining meanss 340 are based on the reception level, determine on The CQI value of each chunk of each antenna of the transmitting terminal, relative value calculating part 1150 is according to pre-determined described every The change pattern of the reference antenna of individual chunk sequentially changes the reference antenna, calculates and represents being somebody's turn to do for relatively described reference antenna The chunk CQI relative values of the relative value of the CQI value of each chunk of antenna beyond reference antenna.
Thus, reference antenna is changed to each chunk according to the pattern of regulation, feeds back the communication quality of the reference antenna The relative value (chunk CQI relative values) of the communication quality of antenna beyond absolute value (absolute value of CQI value) and reference antenna, So as to balancedly keep the reliability of feedback information.In addition, the communication by feeding back each chunk on each antenna Quality, frequency scheduling can be efficiently carried out in transmission system.As a result, in the transmission system of feedback information is received, energy It is enough that control is transmitted based on the feedback information for maintaining reliability and communication quality comprising each chunk, so can Handling capacity in raising system.
The multiple-input and multiple-output reception device of the 1st mode of the present invention, including：Measurement of communication quality unit, using from hair The pilot signal that each antenna of sending end is sent, measure the communication quality of each antenna；Transmitting element, the communication will be based on The feedback information of quality feeds back to the transmitting terminal；Relative value calculating part, based on the benchmark in the antenna of the transmitting terminal The communication quality of the communication quality of antenna and the antenna beyond the reference antenna, calculates each day beyond the reference antenna The relative value of the communication quality of the relatively described reference antenna of line；And feedback information generation unit, from the logical of the reference antenna Believe the absolute value of quality and the relative value of the communication quality, generate the feedback information.
The multiple-input and multiple-output reception device of the 2nd mode of the present invention, including：Level measurement unit is received, is measured from hair The reception level for each pilot signal that each antenna of sending end is sent；CQI determining meanss, based on the reception level, determine The CQI value of each antenna of the transmitting terminal；CQI relative value calculating parts, by described in the antenna based on the transmitting terminal The CQI values and the CQI value to the antenna decision beyond the reference antenna that CQI determining meanss determine to reference antenna, meter CQI relative values are calculated, the CQI relative values represent the CQI value of the relatively described reference antenna of each antenna beyond the reference antenna Relative value；And feedback information generation unit, generation comprising the reference antenna CQI value and the CQI relative values, For the feedback information of the transmitting terminal.
The multiple-input and multiple-output reception device of the 3rd mode of the present invention is the multiple-input and multiple-output reception dress in the 2nd mode In putting, the level measurement unit that receives measures the reception level to each chunk being made up of multiple subcarriers, described CQI determining meanss are based on the reception level, determine the CQI value of each chunk of each antenna on the transmitting terminal, institute State CQI value of the CQI relative value calculating parts based on each chunk determined to the reference antenna and to the reference antenna The CQI value for each chunk that antenna in addition is determined, chunk CQI relative values are calculated, the chunk CQI relative values represent should The relative value of the CQI value of each chunk of the relatively described reference antenna of antenna beyond reference antenna, the feedback information life Feedback information is generated into unit, the feedback information includes the CQI values of each chunk of the reference antenna and the chunk CQI relative values.
The multiple-input and multiple-output reception device of the 4th mode of the present invention is the multiple-input and multiple-output reception dress in the 2nd mode In putting, in addition to reference antenna selecting unit, the CQI value determined based on the CQI determining meanss, from the transmitting terminal The reference antenna is selected in antenna, the CQI relative value calculating parts are based on to being selected by the reference antenna selecting unit The reference antenna CQI value determined and the CQI value determined to the antenna beyond the reference antenna, calculate the CQI Relative value.
The multiple-input and multiple-output reception device of the 5th mode of the present invention is the multiple-input and multiple-output reception dress in the 2nd mode In putting, the level measurement unit that receives measures the reception level to each chunk being made up of multiple subcarriers, described CQI determining meanss are based on the reception level, determine the CQI value of each chunk of each antenna on the transmitting terminal, also Including reference antenna selecting unit, each antenna being determined based on the CQI determining meanss, on the transmitting terminal The CQI value of each chunk, reference antenna, the CQI relative values are selected from the antenna of the transmitting terminal to each chunk Each chunk of antenna beyond the CQI value of reference antenna of the computing unit based on each chunk and the reference antenna CQI value, the chunk CQI relative values of each chunk of the relatively described reference antenna of antenna beyond the reference antenna are calculated, it is described Feedback information generation unit generation feedback information, the CQI value of reference antenna of the feedback information comprising each chunk, The identification information of the reference antenna of the chunk CQI relative values and each chunk.
The multiple-input and multiple-output reception device of the 6th mode of the present invention is the multiple-input and multiple-output reception dress in the 2nd mode In putting, the CQI relative value calculating parts sequentially change the base according to the change pattern of the pre-determined reference antenna Quasi- antenna, calculate the CQI relative values.
The multiple-input and multiple-output reception device of the 7th mode of the present invention is the multiple-input and multiple-output reception dress in the 2nd mode In putting, the level measurement unit that receives measures the reception level to each chunk being made up of multiple subcarriers, described CQI determining meanss are based on the reception level, determine the CQI value of each chunk of each antenna on the transmitting terminal, institute State CQI relative value calculating parts and institute is sequentially changed according to the change pattern of the reference antenna of pre-determined each chunk State reference antenna, calculate chunk CQI relative values, the chunk CQI relative values represent antenna beyond the reference antenna with respect to institute State the relative value of the CQI value of each chunk of reference antenna.
The multiple-input and multiple-output reception device of the 8th mode of the present invention is the multiple-input and multiple-output reception dress in the 4th mode In putting, the reception level highest antenna of the measured each antenna of the reference antenna selecting unit selection is as benchmark day Line.
The multiple-input and multiple-output reception device of the 9th mode of the present invention is the multiple-input and multiple-output reception dress in the 5th mode In putting, the reference antenna selecting unit selects the reception level highest antenna to each antenna measured by each chunk Reference antenna as each chunk.
The multiple-input and multiple-output dispensing device of the 10th mode of the present invention, including：Receiving unit, receive feedback information, institute State the relatively described base of each antenna beyond the absolute value and the reference antenna for the communication quality that feedback information includes reference antenna The relative value of the communication quality of quasi- antenna；Computing unit, the communication matter for each antenna is calculated based on the feedback information Amount；And control unit is sent, the hair for each subflow that each antenna is passed through based on the communication quality calculated, control Send.
Industrial utilizability
The MIMO reception devices of the present invention and MIMO dispensing devices are as can cut down feedback information volume and the system of cutting down is led to The device of traffic is very useful.

Claims (17)

1. radio communication device, including：
Receiving unit, the pilot signal sent from the multiple antennas being transmitted using spatial reuse, institute are received for multiple pieces Multiple pieces are stated by the way that continuously multiple subcarriers are formed in Dividing in frequency domain, wherein the receiving unit is received from the multiple day The first subflow and the second subflow that line is sent；
CQI determining sections, it is determined that each described piece 1CQI values and each described piece another CQI value, wherein the CQI is determined Portion determines another for each described piece of 1CQI values of first subflow and for each described piece of the second subflow CQI value；
Relative value calculating part, the 1CQI values and another CQI value in same described piece, for each described piece Calculate relative value of another CQI value for the 1CQI values；And
Transmitting element, the 1CQI values in same described piece and the relative value are sent,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of another CQI value for second subflow is the second absolute cqi value；
Relative value calculating part calculates each described piece second absolute cqi value for the relative of first absolute cqi value CQI value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
2. radio communication device as claimed in claim 1,
Wherein described transmitting element is sent the 1CQI values as absolute value.
3. radio communication device as claimed in claim 1,
Wherein described transmitting element sends the feedback information being made up of the 1CQI values and the relative value.
4. radio communication device as claimed in claim 1,
Wherein each described piece 1CQI values determine according to the first pilot signal, and each described piece described another CQI value determines according to another pilot signal.
5. radio communication device, including：
Receiving unit, the pilot signal sent from the multiple antennas being transmitted using spatial reuse, institute are received for multiple pieces Multiple pieces are stated by the way that continuously multiple subcarriers are formed in Dividing in frequency domain, wherein the receiving unit is received from the multiple day The first subflow and the second subflow that line is sent；
CQI determining sections, it is determined that each described piece 1CQI values and each described piece another CQI value, wherein the CQI is determined Portion determines another for each described piece of 1CQI values of first subflow and for each described piece of the second subflow CQI value；
Relative value calculating part, for the 1CQI values in same described piece and another CQI value, using with higher value The CQI value of a side relative value of the CQI value of the opposing party is calculated as benchmark；And
Transmitting element, the CQI value of one and the relative value are sent,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of another CQI value for second subflow is the second absolute cqi value；
Relative value calculating part calculates each described piece second absolute cqi value for the relative of first absolute cqi value CQI value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
6. radio communication device, including：
Receiving unit, receive the pilot tone sent respectively from the multiple antennas being transmitted using spatial reuse for multiple pieces and believe Number, the multiple piece by the way that in Dividing in frequency domain, continuously multiple subcarriers are formed, wherein the receiving unit is received from described The first subflow and the second subflow that multiple antennas are sent；
CQI determining sections, it is determined that each described piece 1CQI values and each described piece another CQI value, wherein the CQI is determined Portion is determined for each described piece of 1CQI values of first subflow and for each described piece of second subflow Another CQI value；
Relative value calculating part, for the 1CQI values in same described piece and another CQI value, use the CQI of a side Value calculates the relative value of the CQI value of the opposing party as benchmark；And
Transmitting element, the CQI value of one and the relative value are sent,
For each described piece, according to predetermined pattern, by the CQI value of one in 1CQI values and described another Changed between CQI value,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of another CQI value for second subflow is the second absolute cqi value；
Relative value calculating part calculates each described piece second absolute cqi value for the relative of first absolute cqi value CQI value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
7. radio communication device, including：
Receiving unit, receive the CQI value sent from the radio communication device described in claim 4 and the relative value；
Modulating unit, according to the CQI value and the relative value received, modulate first pilot signal and described another Each of pilot signal；And
Transmitting element, first pilot signal after modulation is sent via the multiple antenna using spatial reuse.
8. radio communication device, including：
Modulating unit, modulated pilots signal；
Transmitting element, using by the way that continuously multiple subcarriers are and form multiple pieces in Dividing in frequency domain, by the signal after modulation Reception device is sent to after spatial reuse via multiple antennas；And
Receiving unit, receives relative cqi value and 1CQI values, the 1CQI values are determined for the first subflow of block, institute State relative cqi value be it is that the 1CQI values and 2CQI values in same described piece calculate, for described piece second Subflow determine the 2CQI values for described piece of the 1CQI values relative cqi value,
The modulating unit is modulated according to the CQI value and the relative cqi value that receive,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of the 2CQI values for second subflow are the second absolute cqi value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
9. radio communication device as claimed in claim 8,
Wherein described receiving unit receives the 1CQI values as absolute value.
10. radio communication device as claimed in claim 8,
Wherein described receiving unit receives the feedback information for including the 1CQI values and the relative cqi value.
11. radio communication device as claimed in claim 8,
Wherein described modulating unit modulates each of the first pilot signal and another pilot signal.
12. radio communication device as claimed in claim 8,
Wherein transmission control unit point carries out frequency scheduling according to the CQI value and the relative cqi value that receive.
13. radio communication device, including：
Modulating unit, modulated pilots signal；
Transmitting element, using by the way that continuously multiple subcarriers are and form multiple pieces in Dividing in frequency domain, described in after modulation Signal is sent to reception device via multiple antennas after spatial reuse, wherein the signal includes the first subflow and the second son Stream；And
Receiving unit, receive it is same in described piece for the 1CQI values of first subflow and for second subflow The relative cqi value of the CQI value of a side in 2CQI values and the CQI value of the opposing party, wherein using the side's with higher value CQI value calculates the relative cqi value of the CQI value of the opposing party as benchmark,
The modulating unit according to the CQI value and the relative cqi value modulated signal received,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of the 2CQI values for second subflow are the second absolute cqi value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
14. radio communication device, including：
Modulating unit, modulated pilots signal；
Transmitting element, using by the way that continuously multiple subcarriers are and form multiple pieces in Dividing in frequency domain, by the signal after modulation Reception device is sent to after spatial reuse via multiple antennas, wherein the signal includes the first subflow and the second subflow；With And
Receiving unit, receive it is same in described piece for the 1CQI values of first subflow and for second subflow The relative cqi value of the CQI value of a side in 2CQI values and the CQI value of the opposing party, wherein being used as benchmark using the CQI value of a side The CQI value of the opposing party is calculated,
The modulating unit is according to the CQI value and the relative cqi value modulated signal received, for each described piece, According to predetermined pattern, the CQI value of one is changed between the 1CQI values and the 2CQI values,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of the 2CQI values for second subflow are the second absolute cqi value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
15. the radio communication device as described in any one of claim 1 to 14,
Wherein the CQI value of antenna corresponds to encoding rate and modulation system.
16. wireless communications method, including：
Using by the way that in Dividing in frequency domain, continuously multiple subcarriers and multiple pieces formed, receive and use space via multiple antennas The pilot signal sent is multiplexed, receives the first subflow and the second subflow sent from the multiple antenna；
Calculate another for each described piece of 1CQI values of first subflow and for each described piece of the second subflow One CQI value；
The 1CQI values and another CQI value in same described piece, it is described another for each described piece calculating Relative value of the CQI value for the 1CQI values；And
The 1CQI values in same described piece and the relative value are sent,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of another CQI value for second subflow is the second absolute cqi value；
Relative value calculating part calculates each described piece second absolute cqi value for the relative of first absolute cqi value CQI value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
17. wireless communications method, including：
Modulated pilots signal；
Using by the way that in Dividing in frequency domain, continuously multiple subcarriers are and form multiple pieces, by the signal after modulation via more Individual antenna is sent to reception device after spatial reuse, wherein the signal includes the first subflow and the second subflow；And
It is 1CQI values and 2CQI in same described piece to receive relative cqi value and 1CQI values, the relative cqi value The 2CQI values for second subflow that value calculates, each described piece are for for described in first subflow The relative cqi value of 1CQI values；
CQI value and the relative cqi value according to receiving are modulated,
Wherein：
Each described piece of the 1CQI values for first subflow are the first absolute cqi value；
Each described piece of the 2CQI values for second subflow are the second absolute cqi value；
Wherein calculated for the first absolute cqi value in first piece in the multiple piece for first subflow and be directed to institute The relative cqi value of second absolute cqi value in first piece in the multiple piece of the second subflow is stated, also, for pin First absolute cqi value in second piece in the multiple piece of first subflow is calculated and is directed to second subflow The multiple piece in second piece in the second absolute cqi value relative cqi value.
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