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    • 4. 发明申请
    • System and method for distributed input-distributed output wireless communications
    • 分布式输入分布式输出无线通信系统和方法
    • US20080118004A1
    • 2008-05-22
    • US11894362
    • 2007-08-20
    • Antonio ForenzaRobert HeathStephen PerlmanRoger Van Der LaanJohn Speck
    • Antonio ForenzaRobert HeathStephen PerlmanRoger Van Der LaanJohn Speck
    • H04L27/00H03D1/04H04J11/00
    • H04L25/03343H04B7/0684H04L1/0057H04L25/0206H04L25/0224H04L2025/03414H04L2025/0377H04L2025/03802
    • A system for compensating for in-phase and quadrature (I/Q) imbalances for multiple antenna systems (MAS) with multi-user (MU) transmissions (defined with the acronym MU-MAS), such as distributed-input distributed-output (DIDO) communication systems, comprising multicarrier modulation, such as orthogonal frequency division multiplexing (OFDM). For example, one embodiment of the system comprises one or more coding modulation units to encode and modulate information bits for each of a plurality of wireless client devices to produce encoded and modulated information bits; one or more mapping units to map the encoded and modulated information bits to complex symbols; and a MU-MAS or DIDO IQ-aware precoding unit to exploit channel state information obtained through feedback from the wireless client devices to compute MU-MAS or DIDO IQ-aware precoding weights, the MU-MAS or DIDO IQ-aware preceding unit precoding the complex symbols obtained from the mapping units using the weights to pre-cancel interference due to I/Q gain and phase imbalances and/or inter-user interference.
    • 用于补偿具有多用户(MU)传输(用首字母缩略词MU-MAS定义)的多天线系统(MAS)的同相和正交(I / Q)不平衡的系统,例如分布式输入分布式输出( DIDO)通信系统,包括多载波调制,例如正交频分复用(OFDM)。 例如,系统的一个实施例包括一个或多个编码调制单元,以编码和调制多个无线客户端设备中的每一个的信息比特,以产生编码和调制的信息比特; 一个或多个映射单元将编码和调制的信息比特映射到复数符号; 以及MU-MAS或DIDO IQ感知预编码单元,以利用通过来自无线客户端设备的反馈获得的信道状态信息来计算MU-MAS或DIDO IQ感知预编码权重,MU-MAS或DIDO IQ感知前一单元预编码 从映射单元获得的复数符号使用权重来预先消除由于I / Q增益和相位不平衡和/或用户间干扰引起的干扰。