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1. 发明授权

US07957701B2 Closed-loop multiple-input-multiple-output scheme for wireless communication based on hierarchical feedback 有权
标题翻译：基于层次反馈的无线通信闭环多输入多输出方案
公开(公告)号：US07957701B2
公开(公告)日：2011-06-07
申请号：US11754624
申请日：2007-05-29
申请人： Angeliki Alexiou , Federico Boccardi , Howard C Huang
发明人： Angeliki Alexiou , Federico Boccardi , Howard C Huang
IPC分类号： H04B1/00
CPC分类号： H04B7/0478 , H04B7/0417 , H04B7/0639 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： The present invention provides methods implemented in a base station having a plurality of antennas and one or more user terminals. One embodiment of the method includes receiving feedback from at least one user in response to transmitting a first frame to said at least one user. The first frame is formed by pre-coding at least one symbol using at least one first code word selected from at least one first code book associated with the at least one user. The method also includes transmitting at least one second frame to the user(s). The second frame(s) are pre-coded using at least one second codeword selected from at least one second codebook. The second codebook(s) determined based on the feedback and the first codeword(s).
摘要翻译：本发明提供了在具有多个天线和一个或多个用户终端的基站中实现的方法。该方法的一个实施例包括响应于向所述至少一个用户发送第一帧而从至少一个用户接收反馈。第一帧通过使用从与至少一个用户相关联的至少一个第一代码簿中选择的至少一个第一代码字来对至少一个符号进行预编码来形成。该方法还包括向用户发送至少一个第二帧。使用从至少一个第二码本中选择的至少一个第二码字对第二帧进行预编码。基于反馈和第一码字确定的第二码本。

2. 发明授权

US07359466B2 Signal detection by a receiver in a multiple antenna time-dispersive system 有权
标题翻译：在多天线时分散系统中的接收机的信号检测
公开(公告)号：US07359466B2
公开(公告)日：2008-04-15
申请号：US09938453
申请日：2001-08-24
申请人： Howard C Huang , Laurence Eugene Mailaender , Magnus Sandell , Harish Viswanathan
发明人： Howard C Huang , Laurence Eugene Mailaender , Magnus Sandell , Harish Viswanathan
IPC分类号： H04B1/10
CPC分类号： H04L25/03012 , H04B1/707 , H04B7/0891 , H04L1/06 , H04L25/0242 , H04L25/03331 , H04L2025/03605 , H04L2025/03617
摘要： In a MIMO system the bit error rate floor caused by time dispersion is reduced by employing a joint minimum mean square error (MMSE) equalizer for all of the respective transmit antenna—receive antenna pairings that are possible in the MIMO system. The resulting joint equalization compensates not only for the impact of the channel on the transmit antenna—receive antenna pairings but also for the interference of the other transmit antennas on any given receive antenna. The joint equalization outperforms simply replicating the prior art minimum mean square error (MMSE) equalizer for each transmit antenna—receive antenna pairings.
摘要翻译：在MIMO系统中，通过对MIMO系统中可能的所有相应的发射天线 - 接收天线配对采用联合最小均方误差（MMSE）均衡器来降低由时间色散引起的误比特率底层。所产生的联合均衡不仅补偿了信道对发射天线 - 接收天线配对的影响，而且补偿了其他发射天线在任何给定的接收天线上的干扰。联合均衡优于简单地复制现有技术的每个发射天线 - 接收天线配对的最小均方误差（MMSE）均衡器。

3. 发明授权

US08634481B1 Feedback technique for wireless systems with multiple transmit and receive antennas 有权
标题翻译：具有多个发射和接收天线的无线系统的反馈技术
公开(公告)号：US08634481B1
公开(公告)日：2014-01-21
申请号：US09714084
申请日：2000-11-16
申请人： Seong-Taek Chung , Howard C Huang , Angel Lozano
发明人： Seong-Taek Chung , Howard C Huang , Angel Lozano
IPC分类号： H04L27/00
CPC分类号： H04L1/0019 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L25/0204 , H04L2001/0096 , H04W52/26 , H04W52/50
摘要： In a wireless communication system using multiple antennas at the transmitter and multiple antennas at the receiver, a so called multiple-input multiple-output (MIMO) system, a substantial improvement in capacity over the case of no feedback can be achieved using considerably less bandwidth than is required to feedback the channel estimate or channel statistics, by supplying as feedback for each data substream of an overall data stream an indicator of a rate and/or an indicator of a gain for transmission of that data substream. The indicator of the rate and/or the indicator of the gain may be the rate and/or gain directly or an encoded representation of the rate and/or gain. Typically, the best performance is achieved if indicators of both the rate and the gain are fed back. If the invention is implemented for wireless systems, then typically for each data substream there is a separate, independent antenna. The rate and the gain are computed as a function of a channel estimate which is developed at the receiver. Advantageously, the transmitter may employ only one-dimensional data coding for each of the data substreams.
摘要翻译：在发射机使用多个天线的无线通信系统中，在接收机处使用多个天线，即所谓的多输入多输出（MIMO）系统，在无反馈的情况下，可以实现相当少的带宽比通过为整个数据流的每个数据子流的反馈提供用于传输该数据子流的速率和/或增益的指示符的指示符来反馈信道估计或信道统计。速率和/或增益指示符的指示符可以是直接的速率和/或增益或速率和/或增益的编码表示。通常情况下，如果速率和增益的指标反馈都能达到最佳性能。如果为无线系统实现本发明，则通常对于每个数据子流，存在单独的独立天线。速率和增益被计算为在接收机处开发的信道估计的函数。有利地，发射机可以仅对数据子流中的每一个采用一维数据编码。

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