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    • 117. 发明授权
    • Precoding in high-order MIMO
    • 高阶MIMO中的预编码
    • US09325538B2
    • 2016-04-26
    • US12339568
    • 2008-12-19
    • Ming JiaJianglei MaPeiying ZhuWen Tong
    • Ming JiaJianglei MaPeiying ZhuWen Tong
    • H04B7/02H04L25/03H04B7/04H04B7/06
    • H04B7/0456H04B7/0417H04B7/0465H04B7/063H04L25/03343
    • A high-order Multiple-Input-Multiple-Output (MIMO) transmitter implementing a covariance-based precoding scheme that exploits transmit channel correlation and a method of operation thereof are provided. In one embodiment, covariance-based precoding is performed at the high-order MIMO transmitter based on feedback from a remote high-order MIMO receiver regarding a covariance-based precoding matrix. The covariance-based precoding matrix is, or is derived from, a transmit channel correlation matrix determined by the high-order MIMO receiver for the high-order MIMO transmitter. The covariance-based precoding provides a beam-forming effect when there is a relatively high degree of transmit channel correlation, thereby improving performance of the high-order MIMO transmitter. Further, because changes in the transmit channel correlation occur relatively slowly over time, feedback overhead requirements are substantially reduced as compared to that required for traditional MIMO precoding schemes.
    • 提供了实现利用发射信道相关的协方差预编码方案的高阶多输入多输出(MIMO)发射机及其操作方法。 在一个实施例中,基于基于协方差的预编码矩阵的来自远程高阶MIMO接收机的反馈在高阶MIMO发射机处执行基于协方差的预编码。 基于协方差的预编码矩阵是由或由高阶MIMO发射机的高阶MIMO接收机确定的发射信道相关矩阵导出的。 当存在相对较高程度的发射信道相关性时,基于协方差的预编码提供波束形成效应,从而提高高阶MIMO发射机的性能。 此外,由于与传统MIMO预编码方案相比,发射信道相关性的变化随时间发生相对较慢,所以反馈开销要求显着降低。