Fast generalized decision feedback equalizer precoder implementation for multi-user multiple-input multiple-output wireless transmission systems

申请公布号：: EP2228956(A3)
申请号：: EP20100002431
申请日期：: 2010.03.09
申请公布日期：: 2014.09.17
申请人：: HITACHI, LTD.
发明人：: GAUR, SUDHANSHU
分类号：: H04L25/03
主分类号：: H04L25/03
摘要：: <p>A technique is used to realize a generalized decision feedback equalizer (GDFE) Precoder (233, 235, 237) for multi-user multiple-input multiple-output (MU-MIMO) systems, which significantly reduces the computational cost while resulting in no capacity loss. The technique is suitable for improving the performance of various MU-MIMO wireless systems including future 4G cellular networks. In one embodiment, a method for configuring a GDFE precoder in a base station of a MU-MIMO wireless system having k user terminals, each user terminal having associated therewith a feedforward filter. The method comprises computing a filter matrix C using one of a plurality of alternative formulas of the invention; and, based on the computation of the filter matrix C, computing a transmit filter matrix B for a transmit filter used to process a symbol vector obtained after a decision feedback equalizing stage of the GDFE precoder, a feedforward filter matrix F, and an interference pre-cancellation matrix G. </p>