基于JADE的测距仪脉冲干扰抑制方法

发布时间：2018-03-23 10:53

本文选题：频段数字航空通信系统　切入点：测距仪信号　出处：《系统工程与电子技术》2016年02期

【摘要】：为解决测距仪脉冲信号干扰L频段数字航空通信系统1(L-band digital aeronautical communications system 1,L-DACS1)正交频分复用接收机的问题,提出一种基于特征矩阵联合对角化(joint approximate diagonalization of eigen-matrices,JADE)的测距仪脉冲干扰抑制方法。首先将干扰抑制问题转化为盲源分离问题,在接收端建立频域盲分离模型,利用JADE算法将接收到有用信号与测距仪干扰信号分离;然后根据干扰信号的功率特性进行分离后信号的识别;最后通过训练序列解决盲源分离固有的幅度模糊性问题,最终恢复出有用接收信号。仿真结果表明:所提出的基于JADE的干扰抑制方法可有效消除测距仪脉冲信号干扰,改善系统的误比特性能,增加传输可靠性。
[Abstract]:In order to solve the problem of orthogonal frequency division multiplexing (OFDDM) receiver for the pulse signal interference in L-band digital aeronautical communication system 1(L-band digital aeronautical communications system 1and L-DACS1 of rangefinder, A method of pulse interference suppression for rangefinder based on eigenmatrix and diagonalization joint approximate diagonalization of eigen-matrice Jade is proposed. Firstly, the interference suppression problem is transformed into a blind source separation problem, and a frequency domain blind separation model is established at the receiving end. The JADE algorithm is used to separate the received useful signal from the range finder's interference signal. Then, according to the power characteristics of the interference signal, the separated signal is recognized. Finally, the inherent ambiguity of the blind source separation is solved by training sequence. The simulation results show that the proposed interference suppression method based on JADE can effectively eliminate the pulse signal interference of the rangefinder, improve the bit error performance of the system and increase the transmission reliability.
【作者单位】：中国民航大学天津市智能信号与图像处理重点实验室;
【基金】：国家自然科学基金(U1233117,61271404) 天津市智能信号与图像处理重点实验室开放基金(2015AFS04)资助课题
【分类号】：V243.1;TN911.4

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