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32. 发明授权

US07599420B2 System and method for distributed input distributed output wireless communications 有权
标题翻译：分布式输入分布式输出无线通信系统和方法
公开(公告)号：US07599420B2
公开(公告)日：2009-10-06
申请号：US11894394
申请日：2007-08-20
申请人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
发明人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
IPC分类号： H04L27/30
CPC分类号： H04L25/03343 , H04B7/0452 , H04B7/0632 , H04B7/0684 , H04B7/0689 , H04B7/10 , H04J11/0033 , H04L1/0057 , H04L25/0206 , H04L25/0224 , H04L27/0014 , H04L27/2646 , H04L27/2657 , H04L27/2675 , H04L2025/03414 , H04L2025/03426 , H04L2025/0377 , H04L2025/03802 , H04L2027/002
摘要： A system and method are described for compensating for frequency and phase offsets in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a method according to one embodiment of the invention comprises: transmitting a training signal from each antenna of a base station to one or each of a plurality of wireless client devices, one or each of the client devices analyzing each training signal to generate frequency offset compensation data, and receiving the frequency offset compensation data at the base station; computing MU-MAS precoder weights based on the frequency offset compensation data to pre-cancel the frequency offset at the transmitter; precoding training signal using the MU-MAS precoder weights to generate precoded training signals for each antenna of the base station; transmitting the precoded training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station; computing a plurality of MU-MAS precoder weights based on the channel characterization data, the MU-MAS precoder weights calculated to pre-cancel frequency and phase offset and/or inter-user interference; precoding data using the MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and transmitting the precoded data signals through each antenna of the base station to each respective client device.
摘要翻译：描述了用于补偿具有多用户（MU）传输（“MU-MAS”）的多天线系统（MAS）中的频率和相位偏移的系统和方法。例如，根据本发明的一个实施例的方法包括：将来自基站的每个天线的训练信号发送到多个无线客户端设备中的一个或每个无线客户端设备，一个或每个客户端设备分析每个训练信号以产生频偏补偿数据，并在基站接收频偏补偿数据; 基于所述频偏补偿数据计算MU-MAS预编码器权重以预先消除所述发射机处的频偏; 使用MU-MAS预编码器权重的预编码训练信号来生成基站的每个天线的预编码训练信号; 将预编码的训练信号从基站的每个天线发送到多个无线客户端设备中的每一个，每个客户端设备分析每个训练信号以产生信道表征数据，以及在基站处接收信道表征数据; 基于所述信道表征数据计算多个MU-MAS预编码器权重，所述MU-MAS预编码器权重被计算为预先消除频率和相位偏移和/或用户间干扰; 使用MU-MAS预编码器权重预编码数据，以生成基站的每个天线的预编码数据信号; 以及通过基站的每个天线将预编码的数据信号发送到每个相应的客户机设备。

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