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公开(公告)号：EP2250779A1
公开(公告)日：2010-11-17
申请号：EP08728841.1
申请日：2008-02-01
CPC分类号： H04L27/2679 , H04L7/042 , H04L7/08 , H04L27/2655 , H04L27/2676
摘要： A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols.
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12.发明授权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：EP1790090B1
公开(公告)日：2010-01-20
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
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13.发明公开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：EP1479177A1
公开(公告)日：2004-11-24
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
摘要： Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a 'beam-forming' transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a 'multi-mode' transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.
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14.发明公开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：EP1468505A1
公开(公告)日：2004-10-20
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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15.发明公开REDUCED COMPLEXITY DETECTION AND DECODING FOR A RECEIVER IN A COMMUNICATION SYSTEM 审中-公开检测并降低复杂度解码FOR A放大器的通信系统
公开(公告)号：EP1949561A2
公开(公告)日：2008-07-30
申请号：EP06838163.1
申请日：2006-11-20
CPC分类号： H04L27/2647 , H04L1/005 , H04L1/0052 , H04L1/06 , H04L25/03171 , H04L2025/03414 , H04L2025/03426
摘要： Techniques for performing detection and decoding at a receiver are described. In one scheme, the receiver obtains R received symbol streams for M data streams transmitted by a transmitter, performs receiver spatial processing on the received symbols to obtain detected symbols, performs log-likelihood ratio (LLR) computation independently for each of D best data streams, and performs LLR computation jointly for the M D remaining data streams, where M > D ≥ 1 and M > 1. The D best data streams may be selected based on SNR and/or other criteria. In another scheme, the receiver performs LLR computation independently for each of the D best data streams, performs LLR computation jointly for the M D remaining data streams, and reduces the number of hypotheses to consider for the joint LLR computation by performing a search for candidate hypotheses using list sphere detection, Markov chain Monte Carlo, or some other search technique.
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16.发明公开CODING AND MODULATION FOR MULTIPLE DATA STREAMS IN A COMMUNICATION SYSTEM 有权编码和调制多个数据流IN A COMMUNICATION SYSTEM
公开(公告)号：EP1891765A2
公开(公告)日：2008-02-27
申请号：EP06785006.5
申请日：2006-06-15
IPC分类号： H04J11/00
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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17.发明公开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：EP1532762A1
公开(公告)日：2005-05-25
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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18.发明公开METHOD AND APPARATUS FOR A MIMO-OFDM COMMUNICATION SYSTEM 审中-公开FOR A MERHEINGANGS-方法和设备/ MORE输出通道OFDM通信系统
公开(公告)号：EP1464134A1
公开(公告)日：2004-10-06
申请号：EP02796128.3
申请日：2002-12-31
CPC分类号： H04L5/0023 , H04L1/06 , H04L5/0042 , H04L5/0044 , H04L5/0058 , H04L5/006
摘要： Techniques to assign terminals for data transmission in a MIMO-OFDM system. A scheduler forms sets of terminals, called a hypothesis, for data transmission for each of a number of frequency bands. One or more sub-hypotheses may be further formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis, or, (2) a specific order for processing the uplink data transmissions from the terminal(s). The performance of each sub-hypothesis is then evaluated. One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and, the set of terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band.
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