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GENERALIZED DECISION FEEDBACK EQUALIZER PRECODER WITH RECEIVER BEAMFORMING FOR MATRIX CALCULATIONS IN MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT WIRELESS TRANSMISSION SYSTEMS
GENERALIZED DECISION FEEDBACK EQUALIZER PRECODER WITH RECEIVER BEAMFORMING FOR MATRIX CALCULATIONS IN MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT WIRELESS TRANSMISSION SYSTEMS
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机译:多用户多输入多输出无线传输系统中带有矩阵估计的接收波束成形的广义决策反馈均衡器预编码器
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摘要
To realize a GDFE precoder for multi-user MIMO systems, which significantly reduces the computational cost while resulting in no capacity loss, one method comprises obtaining an effective downlink (DL) channel matrix H for the DL channel after receiver processing at the user terminals; computing an uplink (UL) covariance matrix D by assuming there are as many user terminals as a number of rows in the effective DL channel matrix H; computing a filter matrix C based on the UL covariance matrix D; computing a feedforward filter matrix F based on the filter matrix C; computing an interference pre-cancellation matrix G, based on the feedforward filter matrix F and the filter matrix C, used in a transmitter at an interference pre-cancellation stage of the GDFE precoder; and processing user symbols by a decision feedback equalizing stage of the GDFE precoder to produce filtered vector symbols.
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