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公开(公告)号：EP1891765B1
公开(公告)日：2018-12-05
申请号：EP06785006.5
申请日：2006-06-15
CPC分类号： H04L1/0009 , H04L1/0003 , H04L1/06 , Y02D50/10
摘要： Techniques for transmitting multiple data streams to a single receiver using a single code rate and different modulation schemes are described. Channel estimates are determined for the multiple data streams and used to select a single code rate and multiple modulation schemes for the multiple data streams. The system may support a set of code rates, and each code rate may be associated with a respective set of modulation schemes that may be used with that code rate. The single code rate for all data streams is selected from among the set of supported code rates, and the modulation scheme for each data stream is selected from among the set of modulation schemes associated with the single code rate. The multiple data streams are encoded in accordance with the single code rate. Each data stream is further modulated in accordance with the modulation scheme selected for that stream.
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2.发明授权POWER CONTROL FOR PARTIAL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权功率控制用于多输入多输出系统（MIMO）WITH部分信道状态信息（CSI）
公开(公告)号：EP1476958B1
公开(公告)日：2008-07-09
申请号：EP03709263.2
申请日：2003-02-19
CPC分类号： H04B7/0417 , H04B7/0619 , H04L1/0001 , H04L1/06 , H04W52/42
摘要： Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.
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3.发明公开RECEIVER STRUCTURES FOR SPATIAL SPREADING WITH SPACE-TIME OR SPACE-FREQUENCY TRANSMIT DIVERSITY 有权接受体结构，空间 - 时间或空间频率发射分集空间扩展
公开(公告)号：EP1790090A1
公开(公告)日：2007-05-30
申请号：EP05794158.5
申请日：2005-09-02
CPC分类号： H04L25/0242 , H04B7/0669 , H04B7/068 , H04B7/0854 , H04L1/0606 , H04L1/0618 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0256 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04L2025/03426
摘要： A receiving entity (150) obtains received symbols for a data transmission having at least one data symbol stream sent with space-time transmit diversity (STTD). The receiving entity derives an overall channel response matrix in accordance w ith the STTD encoding scheme used for the data transmission, derives a spatial f ilter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol interval to obtain a vector of detected symbols for the 2-symbol interval. The receiving ent ity may perform post-processing (e.g., conjugation) on the detected symbols if n eeded. Alternatively, the receiving entity derives a spatial filter matrix based on an effective channel response matrix, performs spatial matched filtering on the received symbols for each symbol period to obtain detected symbols for that symbol period, A receiving entity obtains received symbols for a data transmissi on having at least one data symbol stream sent with space-time transmit diversit y (STTD). The receiving entity derives an overall channel response matrix in acc ordance with the STTD encoding scheme used for the data transmission, derives spatial filter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol int erval to obtain a vector of detected symbols for the 2-symbol interval. The rece iving entity may perform post-processing (e.g., conjugation) on the detected sym bols if needed. Alternatively, the receiving entity derives a spatial filter mat rix based on an effective channel response matrix, performs spatial matched filt ering on the received symbols for each symbol period to obtain detected symbols for that symbol period, and combines multiple estimates obtained for each data s ymbol sent with STTD.
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公开(公告)号：EP1880491A2
公开(公告)日：2008-01-23
申请号：EP06759443.2
申请日：2006-05-09
CPC分类号： H04L1/0002 , H04B7/0413 , H04L1/0015 , Y02D50/10
摘要： Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has an SNR margin below a threshold, each remaining data stream has an SNR margin above a respective threshold, and the total SNR margin for all streams is above a total threshold. For rate selection with margin sharing with a vector-quantized rate set, SNR estimates are obtained for usable transmission channels. The total SNR margin is determined for each rate combination based on the estimates. Each rate combination is associated with a specific number of data streams to transmit, a specific rate for each data stream, and a specific overall throughput. The combination with the highest overall throughput and non-negative total SNR margin is selected.
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5.发明授权REALLOCATION OF EXCESS POWER FOR FULL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权生产能力过剩FOR多个输入 - 输出多个系统（MIMO）系统，具有全信道状态信息REMAP（CSI）
公开(公告)号：EP1468505B1
公开(公告)日：2007-10-03
申请号：EP03707488.7
申请日：2003-01-22
IPC分类号： H04B7/005
CPC分类号： H04W52/346 , H04B7/0443 , H04W24/00 , H04W52/241 , H04W52/267 , H04W52/50 , H04W72/00
摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the 'poorer' transmission channels without sacrificing the performance of the 'better' transmission channels.
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6.发明公开POWER CONTROL FOR PARTIAL CHANNEL-STATE INFORMATION (CSI) MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权功率控制用于多输入多输出系统（MIMO）WITH部分信道状态信息（CSI）
公开(公告)号：EP1476958A2
公开(公告)日：2004-11-17
申请号：EP03709263.2
申请日：2003-02-19
CPC分类号： H04B7/0417 , H04B7/0619 , H04L1/0001 , H04L1/06 , H04W52/42
摘要： Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.
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公开(公告)号：EP2025116A2
公开(公告)日：2009-02-18
申请号：EP07797663.7
申请日：2007-05-22
CPC分类号： H04L27/0014 , H04L1/0045 , H04L5/0023 , H04L5/0048 , H04L25/061 , H04L27/261 , H04L27/2657 , H04L27/2662 , H04L2027/0053 , H04L2027/0067 , H04L2027/0087
摘要： Techniques for performing phase correction for wireless communication are described. Received pilot symbols and received data symbols may be obtained from an orthogonal frequency division multiplexing (OFDM) and/or multiple-input multiple-output (MIMO) transmission. First phase information is obtained based upon the received pilot symbols. Second phase information is obtained based upon the received data symbols. The phase of the received data symbols is corrected based upon the first and second phase information (directly and/or indirectly). For example, the phase of the received data symbols may be corrected based upon the first phase information, detection may be performed on the phase corrected data symbols to obtain estimated data symbols, the second phase information may be obtained based upon the estimated data symbols, and the phase of the estimated data symbols may be corrected based upon the second phase information. The phase correction may also be performed in other manners.
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8.发明授权MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES 有权多输入多输出（MIMO）与多种传输模式的系统
公开(公告)号：EP1479177B1
公开(公告)日：2008-08-13
申请号：EP03709260.8
申请日：2003-02-19
发明人： MEDVEDEV, Irina , WALTON, Jay, R. , WALLACE, Mark
CPC分类号： H04B7/0417 , H04B7/043 , H04B7/0439 , H04B7/0443 , H04B7/061 , H04B7/0626 , H04B7/0689 , H04B7/0691 , H04B7/0854 , H04L1/0002 , H04L1/0618 , H04L5/0023 , H04L5/0025 , H04L5/0046 , H04L5/006 , H04W52/42
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9.发明授权CODED MIMO SYSTEMS WITH SELECTIVE CHANNEL INVERSION APPLIED PER EIGENMODE 有权选择性信道反转编码MIMO系统中应用BY自己的时尚
公开(公告)号：EP1532762B1
公开(公告)日：2006-12-06
申请号：EP03791732.5
申请日：2003-08-19
CPC分类号： H04W52/346 , H04B7/0413 , H04B7/0439 , H04L1/0003 , H04L1/0009 , H04L1/0041 , H04L1/0068 , H04L1/0071 , H04W52/42
摘要： Techniques to perform selective channel inversion per eigenmode in a MIMO system to achieve high spectral efficiency while reducing complexity at both the transmitter and receiver are presented. The available transmission channels are arranged into a number of groups, where each group may include all transmission channels (or frequency bins) for a respective eigenmode of a MIMO channel. The total transmit power is allocated to the groups using a particular group power allocation scheme. Selective channel inversion is then performed independently for each group selected for use for data transmission. For each such group, one or more transmission channels in the group are selected for use, and a scaling factor is determined for each selected channel such that all selected channels for the group achieve similar received signal quality (e.g., received SNR).
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10.发明公开TRANSMISSION MODE SELECTION FOR DATA TRANSMISSION IN A MULTI-CHANNEL COMMUNICATION SYSTEM 审中-公开传输模式用于连接多声道通讯系统数据传输选择
公开(公告)号：EP1604479A2
公开(公告)日：2005-12-14
申请号：EP04757985.9
申请日：2004-03-19
发明人： WALTON, Jay Rod , MEDVEDEV, Irina
CPC分类号： H04L1/0016 , H04L1/0003 , H04L1/0009 , H04L1/0021 , H04L1/0025 , H04L1/0618 , H04L27/2602
摘要： Techniques to select a suitable transmission mode for a data transmission in a multi-channel communication system with multiple transmission channels having varying SNRs. In one method, an SNR estimate is initially obtained for each of multiple transmission channels used to transmit a data stream. An average SNR and an unbiased variance are then computed for the SNR estimates for the multiple transmission channels. A back-off factor is determined, for example, based on the SNR variance and a scaling factor. An operating SNR for the transmission channels is next computed based on the average SNR and the back-off factor. The transmission mode is then selected for the data stream based on the operating SNR. The selected transmission mode is associated with a highest required SNR that is less than or equal to the operating SNR. The method may be used for any system with multiple transmission channels having varying SNRs.
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