论文标题

大量MIMO中有限的PAPR对基于RLS的数字预编码器的急剧分析

Sharp Analysis of RLS-based Digital Precoder with Limited PAPR in Massive MIMO

论文作者

Ma, Xiuxiu, Kammoun, Abla, Alrashdi, Ayed M., Ballal, Tarig, Al-Naffouri, Tareq Y., Alouini, Mohamed-Slim

论文摘要

本文着重于对下行链路多用户大量多输入多输出(MIMO)系统的一类有限峰与平均功率比(PAPR)预编码器的性能分析。与基于简单线性预编码器(例如最大比率传输(MRT)和正则化零型(RZF))的常规预编码方法相反,本文中的预编码器是通过解决凸优化问题获得的。具体来说,这些预言机的设计是限制每个预编码符号进入的功率,并且每个天线处的PAPR可调。通过使用凸高斯最低 - 最大定理(CGMT),我们分析表征了预码矢量的经验分布以及变形与预期的符号矢量之间的关节经验分布。这使我们能够根据每 - 安特纳的功率,每个用户失真功率,信噪比和失真比(SINAD)和位误差概率研究这些预编码器的性能。我们表明,对于此类的预编码器,有一个最佳的传输均值传输功率,它以SINAD和位误差概率最大化了系统性能。

This paper focuses on the performance analysis of a class of limited peak-to-average power ratio (PAPR) precoders for downlink multi-user massive multiple-input multiple-output (MIMO) systems. Contrary to conventional precoding approaches based on simple linear precoders such as maximum ratio transmission (MRT) and regularized zero-forcing (RZF), the precoders in this paper are obtained by solving a convex optimization problem. To be specific, these precoders are designed so that the power of each precoded symbol entry is restricted, and the PAPR at each antenna is tunable. By using the Convex Gaussian Min-max Theorem (CGMT), we analytically characterize the empirical distribution of the precoded vector and the joint empirical distribution between the distortion and the intended symbol vector. This allows us to study the performance of these precoders in terms of per-antenna power, per-user distortion power, signal-to-noise and distortion ratio (SINAD), and bit error probability. We show that for this class of precoders, there is an optimal transmit per-antenna power that maximizes the system performance in terms of SINAD and bit error probability.

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