On the Error Probability of Interference Exploitation Precoding with Power Allocation

Abdelhamid Salem, C. Masouros
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引用次数: 4

Abstract

In this paper, we analyze the performance of constructive interference (CI) precoding in downlink multi-user multiple-input single-output (MU-MISO) systems with phase-shift-keying (PSK) signals. A new closed-form expression is derived for the moment generating function (MGF) of the received signal-to-noise-ratio (SNR). Then, the MGF is used to calculate the average symbol error probability (SEP) for the CI technique. In light of this, new exact analytical expression and very accurate asymptotic expression for the average SEP are presented. Based on the new SEP expressions, a power allocation scheme to minimize the sum SEPs (Min-Sum) is investigated, and analytical expression of the power allocation factors is derived. The numerical results show that, the CI precoding yields superior performance over conventional interference suppression precoding techniques in terms of SEP. Furthermore, the Min-Sum power allocation scheme provides additional up to 10dB gains in the transmit SNR compared to equal power allocation technique.
基于功率分配的干扰开发预编码误差概率研究
本文分析了带相移键控(PSK)信号的下行链路多用户多输入单输出(MU-MISO)系统中构造干扰(CI)预编码的性能。导出了接收信噪比矩生成函数的一种新的封闭表达式。然后,使用MGF计算CI技术的平均符号错误概率(SEP)。据此,提出了新的精确解析表达式和非常精确的平均SEP渐近表达式。在此基础上,研究了以最小和为目标的电力分配方案,并推导了电力分配因子的解析表达式。数值结果表明,CI预编码在SEP方面优于传统的干扰抑制预编码技术。此外,与等功率分配技术相比,最小和功率分配方案在发送信噪比方面提供了高达10dB的额外增益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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