地空通信中持续干扰抑制系统的设计与实现  

Design and implementation of continuous interference suppression system for air-ground communication

作　　者：钟伦珑[1] 胡铁乔[1] ZHONG Lun-long;HU Tie-qiao(Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China)

机构地区：[1]中国民航大学智能信号与图像处理天津市重点实验室,天津300300

出　　处：《计算机工程与设计》2018年第12期3667-3673,共7页Computer Engineering and Design

基　　金：国家自然科学基金项目(61502498);天津市自然科学基金项目(15JCQNJC04400);中央高校基本科研业务费基金项目(3122015C004;3122014D005)

摘　　要：为解决地空通信中的无线电干扰问题,保障飞行安全,结合民航通信中持续干扰的特点,提出基于最小二乘的持续干扰自适应抑制方法。分析双通道系统数学模型,利用信号的时域特点设计干扰抑制器加权矢量的更新方法,利用协方差矩阵的特征值之比自动识别与判断信号中是否仅有持续干扰。在此基础上,采用数字信号处理器DSP芯片和现场可编程门阵列FPGA芯片设计并实现持续干扰抑制系统。仿真与实验结果表明,该方法可以有效地抑制地空通信中的持续干扰。To solve the problem of radio interference in air-ground communication and guarantee the flight safety,an adaptive continuous interference suppression approach based on least squares was proposed by analyzing the characteristics of continuous interference in civil aviation communications.The mathematical model of bi-channel system was analyzed.The update method for the weighting vector of the interference suppressor was designed by using the time-domain characteristics of the signal.The eigenvalue ratio of the covariance matrix was used to automatically identify and judge whether there was only continuous interfe-rence presented in the mixed signal.A continuous interference suppression system was designed and implemented using digital signal processor DSP chip and field programmable gate array FPGA chip.The simulation and experimental results show that the proposed approach can effectively suppress the continuous interference in air-ground communication.

关 键 词：自适应干扰抑制 持续干扰抑制系统 数字信号处理器 现场可编程门阵列 民航地空通信 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TN911[自动化与计算机技术—计算机科学与技术]