Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2021, Vol. 57 ›› Issue (6): 991-996.DOI: 10.13209/j.0479-8023.2021.094

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A Regularization Based Nonlinear Self-Interference Suppression Method for Full Duplex Communication Systems

GUAN Pengxin, WANG Yiru, ZHAO Yuping†   

  1. Institute of Advanced Communications, Peking University, Beijing 100871
  • Received:2020-12-16 Revised:2021-05-24 Online:2021-11-20 Published:2021-11-20
  • Contact: ZHAO Yuping, E-mail: yuping.zhao(at)pku.edu.cn

基于正则化的全双工通信系统非线性自干扰消除方法

管鹏鑫, 汪奕汝, 赵玉萍†   

  1. 北京大学现代通信研究所, 北京 100871
  • 通讯作者: 赵玉萍, E-mail: yuping.zhao(at)pku.edu.cn
  • 基金资助:
    国家重点研发计划(2020YFB1805102)资助

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Abstract:

The nonlinear effect of power amplifier causes the strong nonlinear self-interference signal in the co-time co-frequency full duplex communication system, which reduces the communication performance of the system. A joint self-interference suppression method based on regularization is proposed. Taking into account both the multipath channel and the nonlinear characteristics of power amplifier, the proposed scheme can eliminate the linear and nonlinear self-interference signals, and alleviate the numerical instability of the traditional algorithms. To analyze the performance of the method, a simulation platform is built. Numerical simulation results show that the proposed scheme has higher gain than the traditional linear and nonlinear cancellation schemes.

Key words: full duplex, power amplifier, nonlinear self-interference elimination, regularization

摘要：

针对多径信道和功率放大器非线性特性对同时同频全双工通信系统性能的影响问题, 提出一种基于正则化的联合自干扰消除方案。该方案能够消除线性和非线性自干扰信号, 并且可以缓解传统算法存在的数值不稳定特性。搭建仿真平台对所提方案进行仿真验证, 结果表明, 与传统线性消除和非线性消除方案相比, 该方案具有较高的消除性能增益。

关键词: 全双工, 功率放大器, 非线性自干扰消除, 正则化

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