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Low Complexity WSSOR-based Linear Precoding for Massive MIMO Systems

机译:适用于大规模MIMO系统的基于低复杂度WSSOR的线性预编码

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For Massive MIMO system with hundreds of antennas at the base station and serve a lot of users, regularized zero forcing (RZF) precoding can achieve the high performance, but suffer from high complexity due to the required matrix inversion of large size. To solve this question, we propose a precoding based on weighted symmetric successive over relaxation (WSSOR) method to approximate the matrix inversion. The proposed method can reduce the computational complexity by about one order of magnitude and it can approach the RZF precoding. Besides we propose a simple way to choose the optional relaxation parameter in massive MIMO systems. And we choose weighting factor is only related to the system configuration parameters. Simulation results prove that the proposed WSSOR-based precoding can approach the near-optional performance of RZF precoding with small number of iterations.
机译:对于在基站具有数百个天线并为许多用户服务的Massive MIMO系统,正则归零强制(RZF)预编码可以实现高性能,但由于需要大尺寸的矩阵求逆,因此具有较高的复杂性。为了解决这个问题,我们提出了一种基于加权对称连续过度松弛(WSSOR)方法的预编码,以近似矩阵求逆。所提出的方法可以将计算复杂度降低大约一个数量级,并且可以接近RZF预编码。此外,我们提出了一种简单的方法来选择大规模MIMO系统中的可选松弛参数。并且我们选择的加权因子仅与系统配置参数有关。仿真结果表明,所提出的基于WSSOR的预编码可以以较少的迭代次数达到RZF预编码的接近可选性能。

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