基于小波变换的测距仪脉冲干扰抑制方法

中国民航大学学报

基于小波变换的测距仪脉冲干扰抑制方法

刘海涛，梁光曦

（中国民航大学电子信息工程学院，天津300300）

收稿日期:2014-01-15 修回日期:2014-04-04 出版日期:2015-06-22 发布日期:2015-07-08
作者简介:刘海涛（1966—），男，河北沧州人，教授，博士，研究方向为宽带无线通信，航空通信.
基金资助:
国家自然科学基金项目（U1233117,61271404）

Suppression method of DME pulse interference based on wavelet transformation

LIU Hai-tao,LIANG Guang-xi

(College of Electronic Information Engineering,CAUC,Tianjin 300300,China)

Received:2014-01-15 Revised:2014-04-04 Online:2015-06-22 Published:2015-07-08

摘要/Abstract

摘要：

为解决L频段数字航空通信系统以内嵌方式部署在L频段测距仪频道间而产生的测距仪系统干扰宽带航空数据链接收机的问题，基于小波变换去噪方法提出L-DACS1 系统测距仪脉冲干扰抑制接收机，利用LDACS1及测距仪脉冲干扰信号特性，基于小波变换去噪方法重构测距仪脉冲信号，然后在时域内消除测距仪脉冲干扰信号。计算机仿真结果显示：在高斯白噪声信道与多径信道环境下，所提出L-DACS1 接收机方案可有限消除测距仪脉冲干扰，提高链路传输的可靠性。

关键词: OFDM, L-DACS1, DME, 小波变换

Abstract:

To solve the problem that L-band digital aeronautical communications system 1 (L-DACS1)receiver is always interfered by DME (distance measuring equipment)pulse signals,which is caused by L-band DACS1 deployed in the gaps between two adjacent channels of DME system in L -band,a DME pulse interference suppression receiver is proposed for L-band DACS1 with wavelet transform denoising method. Utilizing the signal characteristics of L-DACS1 and DME system,the DME pulse signal is reconstructed based on wavelet transform denoising method,and the reconstructed DME pulse signal is eliminated from the received signals in time domain. Simulation results show that the proposed receiver scheme can significantly improve the link transmission reliability under the environment of additive white gaussian noise channel and multipath fading channel.

Key words: OFDM, L-DACS1, DME, wavelet transformation

中图分类号:

TN929.5

刘海涛，梁光曦. 基于小波变换的测距仪脉冲干扰抑制方法[J]. 中国民航大学学报.

LIU Hai-tao,LIANG Guang-xi. Suppression method of DME pulse interference based on wavelet transformation[J]. .

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