WO2006075577A1 - マルチアンテナ通信方法およびマルチアンテナ通信装置 - Google Patents
マルチアンテナ通信方法およびマルチアンテナ通信装置 Download PDFInfo
- Publication number
- WO2006075577A1 WO2006075577A1 PCT/JP2006/300147 JP2006300147W WO2006075577A1 WO 2006075577 A1 WO2006075577 A1 WO 2006075577A1 JP 2006300147 W JP2006300147 W JP 2006300147W WO 2006075577 A1 WO2006075577 A1 WO 2006075577A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- retransmission
- substream
- transmission
- substreams
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004891 communication Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 117
- 238000001514 detection method Methods 0.000 claims description 48
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 18
- 239000011159 matrix material Substances 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012536 storage buffer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229940081330 tena Drugs 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
Definitions
- the present invention relates to an automatic retransmission technique in a multi-antenna wireless communication system, and in particular, The present invention relates to a multi-antenna communication method and a multi-antenna communication apparatus that perform retransmission using antenna selection.
- MIMO Multi-Input Multi-Output
- system the transmitting side transmits signals using multi-antennas
- receiving side receives spatial signals using multi-antennas.
- MIMO technology can significantly improve channel capacity and information transmission speed compared to conventional single antenna transmission systems.
- FIG. 1 is a diagram schematically showing a configuration of a conventional MIMO system.
- the transmitting side and the receiving side each have n transmitting antennas 105
- n receiving antennas 106 are used to transmit and receive signals.
- the data to be transmitted is first converted from data source 101 to serial-parallel conversion.
- n data substreams are sent to n transmit antennas 105.
- Each data substream is subjected to CRC (Cyclic Redundancy Check) encoding by the CRC encoding unit 103 before being transmitted.
- CRC encoding is to add CRC bits to the back of each block of data to be transmitted.
- the C RC bit is used on the receiving side for verification of the corresponding block. In other words, whether or not each block has an error when CRC decoding is performed by the CRC decoding unit 108 on the receiving side. Can be judged.
- Each data substream after CRC code is subjected to channel coding and modulation by channel code modulation section 104.
- Each data substream after encoding and modulation is subjected to predetermined radio transmission processing including digital-analog conversion and up-conversion, and is transmitted from the corresponding transmission antenna 105.
- the received signal is subjected to predetermined radio reception processing including down-conversion and analog-digital conversion.
- predetermined radio reception processing including down-conversion and analog-digital conversion.
- the pilot signal is also extracted from the pilot signal.
- channel estimation is performed by the channel estimation unit 110 based on the pilot signal or using another method, and the current channel characteristic matrix H is obtained (for MIMO systems, the channel characteristic is Can be represented by a single matrix).
- the signal after the radio reception processing is subjected to MIMO detection processing and combining processing by MIMO detection Z retransmission combining section 107.
- MIMO detection process the channel characteristic matrix H is used, and the detection process is performed on the signal received by each receiving antenna 106. Also, synthesis is performed on the version after the same signal is retransmitted. The finally obtained signal is output to CRC decoding section 108.
- ZF Zero Forcing
- MMSE Minimum Mean Square Error
- SIC Successessive Interference Cancellation
- MIMO detection typically involves two operations. That is, an operation of decomposing a received signal using a detection element to obtain a signal corresponding to a data substream transmitted from each transmission antenna 105, and an operation of demodulating and decoding each signal. Note that these two operations are not performed independently. In other words, the output from the former is acquired by the latter, and the progress of the former often requires output from the latter. For this reason, demodulation and decoding are included in the MIMO detection Z retransmission combining unit 107 for convenience.
- the signal output to CRC decoding section 108 is the same as the one after the CRC code and the channel code. And the data substream before modulation.
- CRC decoding section 108 performs CRC decoding on the signal output from MIMO detection Z retransmission combining section 107, respectively. Accordingly, it is possible to determine whether or not the current data substream is correctly received.
- Each CRC decoding section 108 generates an acknowledgment (ACK) signal or a negative acknowledgment (NACK) signal after every CRC decoding.
- ACK acknowledgment
- NACK negative acknowledgment
- the generated ACKZNACK signal is fed back to the transmission side via the feedback channel 111.
- the ACK signal is a signal indicating that there is no code error in the data block
- the NACK signal is a signal indicating that there is a code error in the data block.
- the receiving side power if the transmitting side makes a judgment on the signal fed back to the transmitting side, if it is an ACK signal, it means that the corresponding data substream has been correctly received. At the transmission time, a new data substream is transmitted from the corresponding transmission antenna 105.
- the original data substream is transmitted again from the corresponding transmission antenna 105.
- Each data stream output from CRC decoding section 108 is subjected to parallel-serial conversion by parallel-serial conversion (PZ S) section 109, and final received data is acquired and output.
- PZ S parallel-serial conversion
- MIMO detection Z retransmission combining section 107 performs combining processing in addition to performing MIMO detection on received data after multiple transmissions of the same data stream. For example, after N transmissions of a data stream (of which 1 is the initial transmission and N—1 is the retransmission), N received signals are acquired. Here, each is shown as!:, R, -V.
- r is the received signal after the first transmission, and the others are the received signals after retransmission. every time These received signals also usually differ due to changes in channel characteristics during transmission and differences in noise.
- N + 1 received signals r, r, ...! : And r are combined.
- a conventional MIMO system when an error is found in a data substream transmitted by a certain transmission antenna and retransmission of the substream data is performed, antenna selection is not normally performed. In fact, in a conventional MIMO system, if an error occurs in a substream of any antenna, a method of retransmitting the substream with that antenna is usually used. In this way, in the conventional MIMO system, antenna selection is not performed in each retransmission, and the following situation may occur. (1) Since the antenna characteristics at the time of retransmission are too inferior, it is not possible to obtain a completely accurate data stream even after performing this time retransmission and combining processing on the receiving side. Therefore, the next retransmission must be performed, which affects the time delay characteristics of the system.
- An object of the present invention is to provide a multi-antenna communication method and a multi-antenna communication apparatus that can further improve the retransmission performance in multi-antenna transmission.
- Another object of the present invention is based on the channel characteristics of the SINR and retransmission time of the substream currently being retransmitted! /, And is suitable for each retransmission substream adaptively. It is to provide a multi-antenna communication method and a multi-antenna communication apparatus that select a transmission antenna.
- select an antenna When selecting an antenna, first calculate the SINR value after the current detection combining for each substream to be retransmitted. Based on this, a transmission antenna with an appropriate characteristic is selected for each retransmission substream, and retransmission is performed.
- the correct reception of data must be ensured after retransmission by the selected antenna, and on the other hand, the transmission characteristics of other antennas can be degraded by occupying the transmission antenna which is too good. ⁇ .
- Still another object of the present invention is to provide a multi-antenna communication method and a multi-antenna capable of efficiently improving the frequency use efficiency characteristics of a system by optimizing a transmission antenna used for each retransmission. It is to provide a communication device.
- the multi-antenna communication method of the present invention includes the step of obtaining the reception quality of a substream that requires retransmission, and the transmission antenna as a candidate for the antenna used for retransmission when used for retransmission. Determining whether or not there is a transmission antenna satisfying a target value related to reception quality for the substream; and, when there is a transmission antenna satisfying the target value, from a transmission antenna satisfying the target value, a corresponding channel. If the selected transmission antenna is designated as the antenna used for retransmission of the substream, and there is no transmission antenna satisfying the target value, the candidate transmission antenna is selected from the candidate transmission antennas. The channel with the best corresponding channel characteristics is selected, and the selected transmit antenna is connected to the substream.
- a step of designating as an antenna to be used for retransmission, and the like comprising the.
- the multi-antenna communication method of the present invention has the above-described configuration.
- the acquiring step acquires the reception qualities of a plurality of substreams that require retransmission, respectively, and the acquired reception qualities are in descending order.
- the method further comprises the step of selecting each of the plurality of substreams, wherein the step of determining is selected to determine whether or not there is a transmission antenna that satisfies the target value when used for retransmission. I did it for substreams.
- the multi-antenna communication method of the present invention further comprises the step of determining substreams that require retransmission based on the results of cyclic redundancy check decoding for all received substreams in the above configuration. I made it.
- the multi-antenna communication method of the present invention has the above-mentioned configuration.
- the acquiring step includes a multi-input for a sub-stream in which the current transmission is an initial transmission among the plurality of sub-streams.
- the reception quality only after detection of multiple outputs is calculated, and the reception quality at the time of the previous reception is calculated for the substream in which the current transmission is not the first transmission among the plurality of substreams.
- the plurality of substreams are selected in the selecting step in the selecting step, and after the plurality of substreams are selected. Before selecting another substream of the substreams in the step of selecting, further comprising a step of excluding the transmit antennas selected for the one substream from the candidate transmit antennas. It was made to have.
- the multi-antenna communication method of the present invention is configured as described above! After selecting a transmission antenna for each substream requiring retransmission in the step of designating, the sub-stream and the selected transmission are selected. The method further includes a step of feeding back antenna selection information for associating with the antenna.
- the multi-antenna communication method of the present invention is based on the above-described configuration! The step of retransmitting the substreams based on the antenna selection information and the retransmitted substreams. And detecting based on the antenna selection information.
- the multi-antenna communication apparatus of the present invention reduces the reception quality of a substream that requires retransmission.
- FIG. 1 Schematic diagram showing the configuration of a conventional MIMO system
- FIG. 2 is a schematic diagram showing a configuration of a MIMO system according to an embodiment of the present invention.
- FIG. 3 is a block diagram showing a configuration of a retransmission antenna selection unit in the MIMO system according to the embodiment of the present invention.
- FIG. 4 is a flowchart showing antenna selection processing in a method of performing retransmission using antenna selection according to the embodiment of the present invention.
- FIG. 5 is a schematic diagram showing a comparison of characteristics between a method used in the present invention and a conventional method.
- FIG. 2 is a diagram schematically showing a configuration of the MIMO system according to one embodiment of the present invention.
- the MIMO system according to the present embodiment includes a data source 101, an SZP unit 102, n
- Unit 108 PZS unit 109, channel estimation unit 110, and antenna selection unit 201.
- Data source 101, SZP unit 102, CRC code key unit 103, channel code key modulation unit 104, and transmission antenna 105 are included in the transmission apparatus, receiving antenna 106, MIMO detection Z retransmission Combining section 107, CRC decoding section 108, PZS section 109, channel estimation section 110, and antenna selection section 201 are included in the receiving apparatus.
- the transmission side and the reception side each have n transmission antennas 105
- n receiving antennas 106 are used to transmit and receive signals.
- data to be transmitted is first output from the data source 101 to the SZP unit 102, and is divided into n data substreams by the SZP unit 102. N divided
- the data substreams correspond to n transmit antennas 105, respectively.
- Each data substream is sequentially subjected to CRC encoding processing by the CRC code encoding unit 103 and channel code encoding and modulation processing by the channel code modulation unit 104 before being transmitted.
- the channel estimation unit 110 performs channel estimation based on the pilot signal or using another scheme, and the current channel characteristic matrix H is obtained.
- the signal after the radio reception processing is subjected to MIMO detection processing and combining processing by MIMO detection Z retransmission combining section 107.
- MIMO detection process the channel characteristic matrix H is used, and the detection process is performed on the signal received by each receiving antenna 106. Also, synthesis is performed on the received signal after retransmission of the same signal.
- Each data substream output from Z retransmission combining section 107 is subjected to CRC decoding by CRC decoding section 108. As a result, it is determined whether or not there is a code error in each data substream that has been subjected to reception combining processing, and an ACK or NACK signal is correspondingly determined based on the result after CRC decoding. Is returned to the transmitting side and used for control performed for the retransmission operation on the transmitting side.
- antenna selection section 201 is provided on the receiving side.
- Antenna selection section 201 obtains channel characteristic matrix H estimated from channel estimation section 110. Further, the antenna selection unit 201 acquires the signal generated from the CRC decoding unit 108.
- ⁇ Also select the medium power of the transmitting antenna 105.
- the meaning of S ' is as follows.
- the retransmission substream S uses the transmission antenna S 'at the next retransmission, and the substream kl kl
- Ream S uses transmit antenna S 'at the next retransmission, and sends k2 k2 to other substreams.
- the transmitting antenna to be used is similarly inferred.
- the antenna selection unit 201 obtains the selected retransmission antenna set S 'and then feeds it back to the transmission side via the feedback channel 111.
- Retransmission antenna set S ′ fed back to the transmission side via feedback channel 111 is used to determine the output destination of the retransmission substream from S / P section 102.
- the data source 101 on the transmission side extracts the data to be retransmitted and the storage buffer power based on the ACKZNACK signal corresponding to each substream fed back to the reception side. And output to the SZP unit 102. Further, SZP section 102 on the transmission side assigns each retransmission substream to corresponding transmission antenna 105 based on retransmission antenna set S ′ corresponding to each retransmission data substream fed back from the reception side. .
- Each retransmission substream after allocation is subjected to CRC coding, channel coding and modulation by the corresponding CRC code encoding unit 103 and channel code modulation unit 104, and transmitted from the corresponding transmitting antenna 105.
- the New data to be transmitted for the first time can be arbitrarily assigned to the transmission antennas 105 other than the antennas shown in the retransmission antenna set S ′.
- antenna selection section 201 also transmits retransmission antenna set S ′ to MIMO detection Z retransmission combining section 107.
- the retransmission antenna set S ′ is used by the MIMO detection Z retransmission combining unit 107 to perform reception combining on the signal after retransmission.
- data source 101 SZP unit 102, CRC encoding unit 103, channel encoding modulation unit 104, transmission antenna 105, reception antenna 106, MIMO detection Z retransmission combining unit 107, C RC decoding unit 108, PZS unit
- Other functions and operations relating to 109 and the channel estimation unit 110 are the same as those described with reference to FIG.
- antenna selection section 201 is provided on the receiving side. That is, in the present embodiment, the multi-antenna communication method and multi-antenna communication apparatus of the present invention are mounted on the receiving apparatus. However, the multi-antenna communication method and multi-antenna communication apparatus of the present invention may be implemented in the transmission apparatus by providing the antenna selection unit 201 on the transmission side and performing retransmission antenna selection processing on the transmission side.
- FIG. 3 is a schematic diagram showing the configuration of the antenna selection unit 201. As shown in FIG.
- Antenna selection section 201 has substream set calculation section 301, SINR value calculation section 302, and retransmission antenna set acquisition section 303.
- substream set calculation section 301 obtains a result after CRC decoding of each substream output from current MIMO detection Z retransmission combining section 107 from CRC decoding section 108, and based on this result.
- retransmission antenna set acquisition section 303 includes retransmission substream set S calculated by substream set calculation section 301, SIN R value set S calculated by SINR value calculation section 302, and channel estimation section Channel characteristic matrix estimated by 110
- the retransmission substream S uses the transmission antenna S ′ at the next retransmission,
- the retransmission substream S uses the transmission antenna S ′ at the next retransmission, and uses other retransmission services.
- the transmission antenna to be used is inferred.
- FIG. 4 is a flowchart showing antenna selection processing in the method of performing retransmission using antenna selection according to the present embodiment.
- the realization of the method mainly includes the following three steps.
- Initial The initial step is shown in step 401.
- the number of transmission antennas 105 on the transmission side of the MIMO system is n
- the number of reception antennas 106 on the reception side is n. Also send
- the channel characteristic matrix H can be obtained by a normal MIMO channel estimation method.
- the target reception quality for example, the target SINR, indicated as SINR-target.
- SINR target points to the desired SINR value that can be reached after re-synthesizing the data and is one important reference value in the antenna selection process.
- SINR is used as an index representing the target reception quality, but another appropriate index is used alternatively or additionally. Use it.
- SINR—target can be selected as follows. That is, based on a certain target bit error rate (BER), the SNR (Signal to Noise Ratio) threshold value in the white Gaussian noise (AWG N) environment is set to SINR-target.
- BER target bit error rate
- the code I ⁇ adjustment parameters used in the system is 1Z2 turbo codes I spoon and QP SK modulation, for 1Z2 turbo codes I spoon and QPSK modulation, when the target BER is 10_ 4, SNR threshold AWGN approximately 2.2dB. Therefore, SINR-target in this case is determined to be 2.2 dB.
- the first step includes step 402 and step 403 shown in FIG.
- the current retransmission substream set S ⁇ S 1, S 2,... ⁇ Is calculated (step 402)
- the current retransmission substream set S can be easily determined by the substream set calculation unit 301 based on the result after CRC decoding of each substream. That is, it is a set of substreams corresponding to the NACK signal returned through the CRC decoding unit 108.
- SINR value set S ⁇ SINR, SINR, ⁇
- the substream is the first transmission. That is, MIMO detection / retransmission combining section 107 performs only MIMO detection on the substream, and does not perform retransmission combining. At this time, SINR corresponding to substream S points
- Second step The second step includes steps 404 to 410 executed by retransmission antenna set acquisition section 303. In the second step, SINR value set S and channel characteristics
- the second step includes substeps including the following steps (1) to (5).
- This sub-step includes step 404 shown in FIG.
- This sub-step includes steps 405 to 407 shown in FIG. In step 405, it is determined whether or not a non-empty subset P ′ exists in the selection retransmission antenna set P. This subset P 'is received and combined when substream S is retransmitted using an antenna.
- the antenna having the best channel characteristics of the corresponding spatial channel is selected from the selection retransmission antenna set P in step 406.
- the selected antenna is the retransmission key for substream S.
- the antenna with the lowest channel characteristics of the corresponding spatial channel is selected from the subset P' in step 407. .
- the selected antenna is the retransmission antenna for substream S, and S '
- substep (2) The main operation of substep (2) is to determine the subset P ′. Actually! /, When retransmitting substream S using each antenna in selective retransmission antenna set P
- SINR shows
- Substream S is the SINR value after retransmission combining using the pth transmit antenna
- SINR 4 X (SINR + SINR, ) / (SINR X SINR, ').
- SIN kp 4 X (SINR + SINR, ) / (SINR X SINR, ').
- SINR indicates that the P-th transmission element j k pj pj j
- This sub-step includes Step 408 shown in FIG. In step 408, detection at the receiving side at the current time when substream S is retransmitted using antenna S, k k
- the combined SINR value is calculated and stored.
- SINR values ⁇ SINR ', SINR k pi after receiving and combining the signals actually obtained when retransmitting substream S using the respective antennas
- step 403 This is used for step 403 in the first step during the antenna selection operation at the reception time.
- This sub-step includes Step 409 shown in FIG.
- each set S, S and P is updated. That is, retransmission substream set S to substream
- SINR value set S and SINR is removed, and retransmission antenna set for selection k SINR k
- the retransmission antenna S, selected in substep (2), is removed from P.
- This sub-step includes step 410 shown in FIG.
- step 410 it is determined whether the retransmission substream set S is already empty. If the retransmission substream set S is empty, the process returns to step 404. If the retransmission substream is empty, the process proceeds to step 411.
- the third step includes step 411 executed by retransmission antenna set acquisition section 303.
- step 411 the next retransmission of the retransmit substream ⁇ S 1, S 2,.
- retransmission substream S is the next retransmission
- the transmit antenna to be used is similarly estimated k2.
- retransmission antenna set S ′ is used as feedback channel as antenna selection information. Sent to the sender via
- the transmission side first extracts the data to be retransmitted based on the ACKZNACK signal corresponding to each substream returned from the reception side.
- each retransmission substream is assigned to the corresponding transmission antenna and transmitted.
- New data for the first transmission can be arbitrarily assigned to an antenna other than the retransmitted antenna set S ′.
- retransmission antenna set S ′ is output to MIMO detection Z retransmission combining section 107 and used for reception combining for the next retransmission signal.
- the substream selection order SINR is in descending order.
- the selection order can be set variously according to the conditions and requirements in the system.
- FIG. 5 is a schematic diagram showing comparison of frequency use efficiency characteristics between the method used in the present invention and the conventional method.
- the number of transmitting antennas 105 and receiving antennas 106 used in the simulation is four.
- the channel uses a flat fading channel and QPSK modulation.
- In the simulation are included 1000 codes one data frame, the target BER is 10_ 3.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200510004364.8A CN1805323A (zh) | 2005-01-13 | 2005-01-13 | 多天线通信系统中采用天线选择执行重传的方法和设备 |
JP2006552910A JP4769201B2 (ja) | 2005-01-13 | 2006-01-10 | マルチアンテナ通信方法およびマルチアンテナ通信装置 |
US11/813,650 US7860184B2 (en) | 2005-01-13 | 2006-01-10 | Multi-antenna communication method and multi-antenna communicaton apparatus |
CN2006800023384A CN101103575B (zh) | 2005-01-13 | 2006-01-10 | 多天线通信方法和多天线通信设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200510004364.8 | 2005-01-13 | ||
CN200510004364.8A CN1805323A (zh) | 2005-01-13 | 2005-01-13 | 多天线通信系统中采用天线选择执行重传的方法和设备 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006075577A1 true WO2006075577A1 (ja) | 2006-07-20 |
Family
ID=36677602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/300147 WO2006075577A1 (ja) | 2005-01-13 | 2006-01-10 | マルチアンテナ通信方法およびマルチアンテナ通信装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7860184B2 (ja) |
JP (1) | JP4769201B2 (ja) |
CN (2) | CN1805323A (ja) |
WO (1) | WO2006075577A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008072722A (ja) * | 2006-09-15 | 2008-03-27 | Samsung Electronics Co Ltd | Mimo−ofdm送受信方法及び装置、並びにコンピュータ読み取り可能な記録媒体 |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1999878B1 (en) * | 2006-03-24 | 2016-10-12 | Telefonaktiebolaget LM Ericsson (publ) | Method and arrangement in a telecommunication system |
US20080311939A1 (en) * | 2007-06-18 | 2008-12-18 | Nokia Corporation | Acknowledgment aided space domain user scheduling for multi-user mimo |
CN101340687B (zh) * | 2007-07-04 | 2011-09-21 | 中兴通讯股份有限公司 | 智能天线射频端线缆顺序检测方法及装置 |
US9591086B2 (en) | 2007-07-25 | 2017-03-07 | Yahoo! Inc. | Display of information in electronic communications |
US8054776B2 (en) * | 2007-11-16 | 2011-11-08 | Mitsubishi Electric Research Laboratories, Inc. | Multiple power-multiple access in wireless networks for interference cancellation |
US9584343B2 (en) | 2008-01-03 | 2017-02-28 | Yahoo! Inc. | Presentation of organized personal and public data using communication mediums |
CN101577612B (zh) * | 2008-05-07 | 2013-06-05 | 华为技术有限公司 | 一种多输入多输出系统的数据传输方法、系统及装置 |
CN101594219B (zh) * | 2008-05-27 | 2013-01-16 | 中兴通讯股份有限公司 | 用于多输入多输出系统的混合自动重传请求方法及系统 |
WO2010138735A1 (en) * | 2009-05-27 | 2010-12-02 | At&T Intellectual Property I, L.P. | Transmit antenna subset selection for retransmission |
WO2010141216A2 (en) | 2009-06-02 | 2010-12-09 | Xobni Corporation | Self populating address book |
US9721228B2 (en) | 2009-07-08 | 2017-08-01 | Yahoo! Inc. | Locally hosting a social network using social data stored on a user's computer |
US8984074B2 (en) | 2009-07-08 | 2015-03-17 | Yahoo! Inc. | Sender-based ranking of person profiles and multi-person automatic suggestions |
US7930430B2 (en) | 2009-07-08 | 2011-04-19 | Xobni Corporation | Systems and methods to provide assistance during address input |
US8990323B2 (en) | 2009-07-08 | 2015-03-24 | Yahoo! Inc. | Defining a social network model implied by communications data |
US9087323B2 (en) * | 2009-10-14 | 2015-07-21 | Yahoo! Inc. | Systems and methods to automatically generate a signature block |
US9514466B2 (en) | 2009-11-16 | 2016-12-06 | Yahoo! Inc. | Collecting and presenting data including links from communications sent to or from a user |
US9760866B2 (en) | 2009-12-15 | 2017-09-12 | Yahoo Holdings, Inc. | Systems and methods to provide server side profile information |
US9356828B2 (en) | 2010-01-04 | 2016-05-31 | Telefonaktiebolaget L M Ericsson (Publ) | Shared path recovery scheme |
US8423545B2 (en) * | 2010-02-03 | 2013-04-16 | Xobni Corporation | Providing user input suggestions for conflicting data using rank determinations |
US8924956B2 (en) | 2010-02-03 | 2014-12-30 | Yahoo! Inc. | Systems and methods to identify users using an automated learning process |
US8982053B2 (en) | 2010-05-27 | 2015-03-17 | Yahoo! Inc. | Presenting a new user screen in response to detection of a user motion |
US8620935B2 (en) | 2011-06-24 | 2013-12-31 | Yahoo! Inc. | Personalizing an online service based on data collected for a user of a computing device |
US8972257B2 (en) | 2010-06-02 | 2015-03-03 | Yahoo! Inc. | Systems and methods to present voice message information to a user of a computing device |
US8539297B1 (en) * | 2011-02-01 | 2013-09-17 | Sprint Communications Company L.P. | Determining whether a wireless access node should retransmit data packets based on the condition of a reverse wireless link |
US10078819B2 (en) | 2011-06-21 | 2018-09-18 | Oath Inc. | Presenting favorite contacts information to a user of a computing device |
US9747583B2 (en) | 2011-06-30 | 2017-08-29 | Yahoo Holdings, Inc. | Presenting entity profile information to a user of a computing device |
US10977285B2 (en) | 2012-03-28 | 2021-04-13 | Verizon Media Inc. | Using observations of a person to determine if data corresponds to the person |
CN104081687B (zh) * | 2012-09-28 | 2017-11-03 | 松下知识产权经营株式会社 | 通信装置以及通信方法 |
US10013672B2 (en) | 2012-11-02 | 2018-07-03 | Oath Inc. | Address extraction from a communication |
US10192200B2 (en) | 2012-12-04 | 2019-01-29 | Oath Inc. | Classifying a portion of user contact data into local contacts |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6937584B2 (en) * | 2001-06-29 | 2005-08-30 | Qualcomm, Incorporated | Method and apparatus for controlling gain level of a supplemental channel in a CDMA communication system |
US20030039226A1 (en) * | 2001-08-24 | 2003-02-27 | Kwak Joseph A. | Physical layer automatic repeat request (ARQ) |
GB0125178D0 (en) * | 2001-10-19 | 2001-12-12 | Koninkl Philips Electronics Nv | Method of operating a wireless communication system |
IL151937A0 (en) * | 2002-02-13 | 2003-07-31 | Witcom Ltd | Near-field spatial multiplexing |
US20030231582A1 (en) * | 2002-05-06 | 2003-12-18 | Enikia L.L.C. | Method and system of channel analysis and carrier selection in OFDM and multi-carrier systems |
KR20040038327A (ko) * | 2002-10-31 | 2004-05-08 | 엘지전자 주식회사 | 무선 통신 시스템의 전송 안테나 할당 방법 |
US7304971B2 (en) * | 2002-11-01 | 2007-12-04 | Lucent Technologies Inc. | Flexible transmission method for wireless communications |
JP3952404B2 (ja) * | 2003-05-19 | 2007-08-01 | ソニー株式会社 | 受信装置 |
WO2005088872A1 (en) * | 2004-03-12 | 2005-09-22 | Samsung Electronics Co., Ltd. | System and method for managing safety channel in an orthogonal frequency division multiple access communication system |
KR101582431B1 (ko) * | 2004-06-07 | 2016-01-04 | 애플 인크. | 무선 접속망에서 핸드오프 및 핸드오프 선택 |
JP4762619B2 (ja) * | 2004-07-14 | 2011-08-31 | パナソニック株式会社 | 通信端末装置及び無線通信方法 |
US7292825B2 (en) * | 2004-10-19 | 2007-11-06 | Ipwireless, Inc. | Retransmission scheme in a cellular communication system |
-
2005
- 2005-01-13 CN CN200510004364.8A patent/CN1805323A/zh active Pending
-
2006
- 2006-01-10 US US11/813,650 patent/US7860184B2/en not_active Expired - Fee Related
- 2006-01-10 WO PCT/JP2006/300147 patent/WO2006075577A1/ja not_active Application Discontinuation
- 2006-01-10 CN CN2006800023384A patent/CN101103575B/zh not_active Expired - Fee Related
- 2006-01-10 JP JP2006552910A patent/JP4769201B2/ja not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
DAVIS L. M. ET AL.: "System Architecture and ASICs for a MIMO3GPP-HSDPA Receiver", IN: VEHICULAR TECHNOLOGY CONFERENCE 2003 SPRINNG, vol. 2, 25 April 2003 (2003-04-25), pages 818 - 822, XP010862529 * |
ZHENG H, LOZANO A, HALEEM M.: "MULTIPLE ARQ PROCESSES FOR MIMO SYSTEMS", IN:PARSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 2002, vol. 3, 18 September 2002 (2002-09-18), pages 1023 - 1026, XP010611417 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008072722A (ja) * | 2006-09-15 | 2008-03-27 | Samsung Electronics Co Ltd | Mimo−ofdm送受信方法及び装置、並びにコンピュータ読み取り可能な記録媒体 |
Also Published As
Publication number | Publication date |
---|---|
CN101103575A (zh) | 2008-01-09 |
JP4769201B2 (ja) | 2011-09-07 |
CN1805323A (zh) | 2006-07-19 |
CN101103575B (zh) | 2012-02-01 |
JPWO2006075577A1 (ja) | 2008-06-12 |
US7860184B2 (en) | 2010-12-28 |
US20090010353A1 (en) | 2009-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006075577A1 (ja) | マルチアンテナ通信方法およびマルチアンテナ通信装置 | |
JP4884722B2 (ja) | 無線通信装置及び無線通信方法 | |
US7826557B2 (en) | Retransmitting method and transmitting method in multi-antenna transmission | |
US8065579B2 (en) | Retransmission control scheme and wireless communication apparatus | |
US8223734B2 (en) | Apparatus and method for transmitting and receiving forward shared control channel in a mobile communication system | |
WO2006095904A1 (ja) | 再送方法、無線受信装置、およびマルチアンテナ無線通信システム | |
US20090268621A1 (en) | Transmitting apparatus, receiving apparatus and multiplex number controlling method | |
EP1753154A2 (en) | Method and apparatus for ordering retransmissions in an NxM Mimo system | |
JP5043079B2 (ja) | 移動通信システム、受信機、受信方法 | |
WO2009084927A1 (en) | Method for packet retransmission employing feedback information | |
WO2006118081A1 (ja) | 送信装置、受信装置及びリンクアダプテーション方法 | |
WO2006101213A1 (ja) | Mimo通信装置及びデータ再送方法 | |
US8467471B2 (en) | Coding and modulation selecting method and wireless communication equipment | |
WO2011134183A1 (zh) | 调整数据发送速率的方法和装置 | |
US20100080315A1 (en) | Mimo transmission mode selecting method and wireless communication equipment | |
WO2006095741A1 (ja) | マルチアンテナ無線通信システム、無線受信装置、および再送方法 | |
JP4792527B2 (ja) | 送信方法および送信装置 | |
EP1589674A1 (en) | Apparatus and method for communication | |
JP2008228145A (ja) | マルチユーザmimoシステムにおける受信機、制御プログラム及び受信制御方法 | |
WO2006075662A1 (ja) | マルチアンテナ通信システムにおける適応伝送検出方法およびマルチアンテナ受信装置 | |
JP5029769B2 (ja) | 送信方法および送信装置 | |
JP4081043B2 (ja) | 無線送信装置、無線受信装置、無線送信方法及び無線受信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006552910 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11813650 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680002338.4 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06702687 Country of ref document: EP Kind code of ref document: A1 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 6702687 Country of ref document: EP |