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41. 发明申请

US20070127586A1 MULTIPLE STREAM CO-PHASING FOR MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) SYSTEMS 有权
标题翻译：用于多输入多输出（MIMO）系统的多条流混合
公开(公告)号：US20070127586A1
公开(公告)日：2007-06-07
申请号：US11275068
申请日：2005-12-07
申请人： Abdulrauf Hafeez
发明人： Abdulrauf Hafeez
IPC分类号： H04L1/02
CPC分类号： H04B7/0697 , H04B7/0634 , H04B7/0691
摘要： A system and method for transmitting multiple independent data streams from subsets of a plurality of radio antennas. The method includes determining by the receiver, an antenna partitioning, including relative phase rotations to be applied to each antenna, that results in the highest channel capacity among the possible partitionings. The receiver then provides partitioning information to the transmitter, including the number of antenna subsets, which antennas are included in each subset, the capacity of the data stream to be transmitted from each antenna subset, and the relative phase rotations to be applied to the antennas in each subset. The transmitter partitions the plurality of radio antennas into mutually exclusive subsets in accordance with the partitioning information, applies the relative phase rotation to each antenna, and transmits an independent data stream from each subset of antennas with a rate not greater than the stream capacity.
摘要翻译：一种用于从多个无线电天线的子集发送多个独立数据流的系统和方法。该方法包括由接收机确定天线划分，包括要施加到每个天线的相对相位旋转，其导致可能的分区之间的最高信道容量。然后，接收机向发射机提供划分信息，包括天线子集的数量，哪些天线包括在每个子集中，从每个天线子集发送的数据流的容量以及要应用于天线的相对相位旋转在每个子集。发射机根据划分信息将多个无线电天线划分为相互排列的子集，将相对相位旋转应用于每个天线，并以不大于流量的速率从每个天线子集发送独立的数据流。

42. 发明申请

US20060068709A1 Adaptive set partitioning for reduced state equalization and joint demodulation 审中-公开
标题翻译：用于减少状态均衡和联合解调的自适应分组
公开(公告)号：US20060068709A1
公开(公告)日：2006-03-30
申请号：US10953261
申请日：2004-09-29
申请人： Abdulrauf Hafeez
发明人： Abdulrauf Hafeez
IPC分类号： H04Q7/20
CPC分类号： H04L25/03229 , H04L25/0224 , H04L25/03292
摘要： A method and a receiver (mobile station) are described herein for mitigating interference in a radio signal received from a base station and interfered for example by at least one co-channel base station, at least one adjacent channel base station and/or additive white Gaussian noise. The receiver mitigates the interference by using an enhanced reduced-state sequence estimation (RSSE) technique that selects a best set partition which is used to partition a joint signal set that is a function of symbols and channel coefficients associated with the radio signal. The best set partition is selected by exploiting estimated channel responses and/or other channel parameters like rotation and frequency offsets. And, the best set partition describes which signal states of the joint signal set are to be combined together for reduced-state joint demodulation of the radio signal or reduced-state equalization of a multiple-input-multiple-output (MIMO) channel.
摘要翻译：本文描述了一种方法和接收机（移动台），用于减轻从基站接收的无线电信号中的干扰，并且例如由至少一个同频道基站，至少一个相邻信道基站和/或加性白高斯噪声。接收机通过使用增强的减小状态序列估计（RSSE）技术来减轻干扰，该技术选择用于划分作为与无线电信号相关联的符号和信道系数的函数的联合信号集合的最佳组分配。通过利用估计的信道响应和/或其他信道参数（如旋转和频率偏移）来选择最佳组分配。而且，最佳组分区描述联合信号集合的哪些信号状态将被组合在一起用于无线电信号的减少状态联合解调或多输入多输出（MIMO）信道的缩减状态均衡。

43. 发明授权

US06304618B1 Methods and systems for reducing co-channel interference using multiple timings for a received signal 有权
标题翻译：用于使用接收信号的多个定时来减少同信道干扰的方法和系统
公开(公告)号：US06304618B1
公开(公告)日：2001-10-16
申请号：US09143821
申请日：1998-08-31
申请人： Abdulrauf Hafeez , Karl J. Molnar , Gregory E. Bottomley
发明人： Abdulrauf Hafeez , Karl J. Molnar , Gregory E. Bottomley
IPC分类号： H03D100
CPC分类号： H04L25/03337 , H04L25/0204
摘要： A plurality of timings are estimated for a received signal wherein the plurality of timings correspond to a plurality of transmitted signals. The received signal is then sampled in accordance with the plurality of timings, to produce a plurality of sample streams from the received signal. Channel estimates are produced for the plurality of transmitted signals and metrics are computed using the sample streams and the channel estimates. Information symbols corresponding to the transmitted signals are detected by using the metrics. Accordingly, by using multiple timings for a received signal, rather than using a common timing, the number of channel taps that are used may be reduced and the accuracy of symbol detection may be increased. The channel estimates may be produced by generating pulse-shape information and producing channel estimates for the multiple transmitted signals using the received signal and the pulse-shape information. Channel estimates may be produced that correspond to a plurality of symbol sequence hypotheses. Channel estimates may be updated using an error signal.
摘要翻译：针对接收信号估计多个定时，其中多个定时对应于多个发送信号。然后根据多个定时对接收到的信号进行采样，以从接收信号产生多个采样流。对于多个发送信号产生信道估计，并且使用采样流和信道估计来计算度量。通过使用度量来检测对应于所发送的信号的信息符号。因此，通过对接收到的信号使用多个定时，而不是使用公共定时，可以减少使用的信道抽头的数量，并且可以增加符号检测的精度。可以通过使用接收信号和脉冲形状信息产生脉冲形状信息并产生多个发送信号的信道估计来产生信道估计。可以产生对应于多个符号序列假设的信道估计。可以使用错误信号来更新信道估计。

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