An Efficient Modified Gauss Seidel Precoder for Downlink Massive MIMO Systems

摘要: Recently, as the demand for tremendous spectral efficiency has increased, massive multiple-input multiple-output (MIMO) system attracted attention in wireless communication system. In MIMO, zero forcing (ZF) precoder provides optimal performance. However, complexity process of matrix inversion is burden terms practical implementation. Therefore, many researches approximate channel have been performed order to reduce complexity. The typical linear based on Gauss Seidel (GS) precoder. GS similar precoded signals ZF with low does not adopt parallel implementation because inner structure. Consequently, iterative method spends a lot times estimate signal. this problem makes impractical. article, punctured (PGS) proposed mitigate operation by modifying structure performance PGS degraded due modified ordering which degradation mitigated additionally introduced. As result, although delay when signal obtained decreases than precoder, BER contrast, improved decrease compared