系统工程与电子技术 ›› 2019, Vol. 41 ›› Issue (11): 2611-2618.doi: 10.3969/j.issn.1001-506X.2019.11.26

• 通信与网络 • 上一篇    下一篇

基于抵消技术的邻道干扰抑制

霍晓磊1,2, 赵宏志1, 刘颖1, 崔佩璋2, 全厚德2, 唐友喜1   

  1. 1. 电子科技大学通信抗干扰技术国家级重点实验室, 四川 成都 611731;
    2. 陆军工程大学石家庄校区电子与光学工程系, 河北 石家庄 050003
  • 出版日期:2019-10-30 发布日期:2019-11-05

Adjacent channel interference suppression based on cancellation technology

HUO Xiaolei1,2, ZHAO Hongzhi1, LIU Ying1, CUI Peizhang2, QUAN Houde2, TANG Youxi1   

  1. 1. National Key Lab of Science and Technology on Communications, University of Electronic Science and
    Technology of China, Chengdu 611731, China; 2. Department of Electronic and Optical Engineering,
    Shijiazhuang Campus of Army Engineering University, Shijiazhuang 050003, China
  • Online:2019-10-30 Published:2019-11-05

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摘要： 针对无线设备间的邻道干扰,提出了一种干扰抑制方法。在接收机中设计邻道干扰重建支路,利用记忆多项式估计信道的非线性参数,构建邻道干扰信号模型并重建干扰信号,最终从接收信号中消除邻道干扰信号。所提方法能够有效减小邻道干扰影响,提升期望信号接收信噪比,使有限带宽内容纳更多通信设备。计算机仿真与软件无线电平台实验结果表明,在实验室视距环境中,甚高频频段,信号带宽25 kHz,所提方法能够抑制18 dB的邻道干扰,为有限空间内无线电设备间邻道干扰抑制提供了新的研究思路。

关键词: 邻道干扰, 非线性失真, 参数估计, 干扰抑制

Abstract: To alleviate adjacent channel interference (ACI) between wireless devices, a suppression method is proposed in this paper. An auxiliary chain is deployed to reconstruct the interference signal, and memory polynomial is used to estimate the nonlinear parameters. Eventually the interference signal is reconstructed and subtracted from the received signal. The proposed method can effectively alleviate the ACI and improve the signal-to-noise ratio of the desired signal. It can also accommodate more equipment within limited bandwidth. The simulation and experimental results show that under the conditions of laboratory line of sight environment, the carrier is in the very high frequency band, the signal bandwidth is 25 kHz, and the proposed method can suppress 18 dB ACI. It provides a new method for ACI suppression between radio devices in finite space.

Key words: adjacent channel interference, nonlinear distortion, parameter estimation, interference suppression

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