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单通道恒模抗干扰民航VHF接收机设计与实现

吴仁彪,王心鹏,胡铁乔,石庆研,汪万维   

  1. (taptap下载安装安卓天津市智能信号与图像处理重点实验室,天津 300300)
  • 收稿日期:2012-11-09 修回日期:2013-01-06 出版日期:2014-04-25 发布日期:2014-03-21
  • 作者简介:吴仁彪(1966—),男,湖北武汉人,教授,博士,研究方向为自适应信号处理、高分辨率雷达成像与自动目标识别等.
  • 基金资助:

    天津市科技支撑计划重点项目(10ZCKFGX04000);国家科技支撑计划项目(2011BAH24B12);国家自然科学基金项目(61172112,61179064);中央高校基本科研业务费专项(ZXH2012M006,ZXH2009A003)

Design and implementation of single-channel constant modulus anti-interference civil aviation VHF receiver

WU Ren-biao,WANG Xin-peng,HU Tie-qiao,SHI Qing-yan,WANG Wan-wei   

  1. (Tianjin Key Lab for Intelligent Signal and Image Processing,CAUC,Tianjin 300300,China)
  • Received:2012-11-09 Revised:2013-01-06 Online:2014-04-25 Published:2014-03-21

摘要:

为了消除恒模干扰对民航VHF话音通信系统的影响,以FPGA 和DSP 为平台设计实现了基于单通道恒模算法的抗干扰接收机。接收机中的干扰抑制系统使用DSP 对受干扰的AM信号进行载频估计,使用FPGA实现陷波、正交变换、基于非线性最小二乘法的恒模干扰实时估计和干扰抑制等过程。系统测试表明:抗干扰接收机能够有效地抑制恒模干扰,且具有处理速度快、稳定性好的特点。

关键词: 单通道恒模算法, 干扰抑制, FPGA, DSP

Abstract:

To eliminate the impact of constant modulus interference on civil aviation VHF voice communication,the anti-interference receiver based on single-channel constant modulus algorithm has been designed and implemented on FPGA and DSP platform. First the carrier frequency of interfered AM signal is estimated by using DSP in the interference suppression system of the anti-interference receiver,then the processes of carrier suppression,orthogonal transformation as well as real-time estimation of the constant modulus interference based on nonlinear least square method and interference suppression are implemented in FPGA. System testing demonstrates the anti-interference receiver can suppress interference effectively and has the features of fast processing and good stability.

Key words: single-channel constant modulus algorithm, interference suppression, FPGA, DSP

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