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Performance of anM-QAM full-duplex wireless system with a nonlinear amplifier

非线性功放对M-QAM全双工无线通信的影响分析

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Abstract

The effect of amplifier nonlinearity is analyzed forM-QAM full-duplex communications in additive white Gaussian noise channels. Two classical memoryless nonlinear amplifier models, i.e., a traveling-wave tube amplifier and a solid-state power amplifier, are considered. An analytical expression for the bit error ratio is derived using a characteristic function and numerical integration. Theoretical results show perfect agreement with those obtained by simulation. The analytical results could be used to evaluate the degradation in performance of anM-QAM full-duplex system caused by amplifier nonlinearity, and will be helpful in finding the optimal static operating point of an amplifier.

摘要

创新点

本文分析了非线性功放对M-QAM全双工无线通信性能的影响; 采用行波管功放(TWTA)模型和固态功放(SSPA)模型, 并通过特征函数和数值积分的方法求出M-QAM全双工无线通信误码率的表达式, 最终用仿真验证了理论分析的正确性。本文结论可用于估算M-QAM全双工无线通信中非线性功放带来的信噪比损失, 以及为非线性功放选择最佳的静态工作点。

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Author information

Authors and Affiliations

  1. National Key Laboratory and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Zhaojun He, Wanzhi Ma, Shihai Shao, Fei Wu & Youxi Tang

  2. School of Electrical and Information Engineering, Xihua University, Chengdu, 6110039, China

    Chaojin Qing

Authors
  1. Zhaojun He

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  2. Wanzhi Ma

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  3. Shihai Shao

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  4. Fei Wu

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  5. Chaojin Qing

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  6. Youxi Tang

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Corresponding author

Correspondence toYouxi Tang.

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