联合NLS 与CS 信号重构的DME 干扰抑制方法

taptap下载安装安卓学报

联合NLS 与CS 信号重构的DME 干扰抑制方法

刘海涛，陈仟，王磊，李冬霞

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:2017-12-25 修回日期:2018-03-03 出版日期:2018-10-25 发布日期:2018-11-19
作者简介:刘海涛（1966—），男，河北深州人，教授，博士后，研究方向为航空移动通信和宽带移动通信.
基金资助:
国家自然科学基金项目（U1633108）；中央高校基本科研业务费专项（3122017012）

DME interference suppression method based on joint NLS and CS signal reconstruction

LIU Haitao, CHEN Qian, WANG Lei, LI Dongxia

Intelligent Signal and Image Processing Key Lab of Tianjin, CAUC, Tianjin 300300, China

Received:2017-12-25 Revised:2018-03-03 Online:2018-10-25 Published:2018-11-19

摘要/Abstract

摘要： L 频段数字航空通信系统1（L-DACS1）以内嵌方式工作在测距仪（DME）波道间，会产生测距仪信号干扰正交频分复用（OFDM）接收机的问题，针对此提出联合非线性最小二乘法（NLS）与压缩感知（CS）信号重构的测距仪干扰抑制方法（简称联合DME 干扰抑制方法）。首先，接收机通过非线性最小二乘法重构DME 信号，并在时域消除DME 信号；然后，通过低通滤波器进一步消除残留DME 信号及带外噪声的影响；最后，利用压缩感知方法重构残留DME 信号，并转换到频域消除残留的DME 信号。仿真结果表明：所提出的联合干扰抑制方法可衰减DME 信号功率达45 dB，显著地提高了OFDM 系统链路传输可靠性。

关键词: L 频段数字航空通信系统1, 测距仪干扰, 非线性最小二乘, 压缩感知

Abstract: To mitigate the influence of DME signal on OFDM receiver of L-DACS1 operating as an inlay system,DME interference suppression method based on joint NLS(nonlinear least square) and CS (compression sensing) signal reconstruction is presented. Firstly, DME signal is reconstructed by NLS and eliminated in time domain. Secondly, the output signal of NLS is filtered by low-pass filter to reduce the out-of-band interference signal and noise signal. Finally, the residual DME signal is reconstructed by CS algorithm and eliminated in frequency domain.Computer simulation results show that the proposed method can effectively suppress DME interference and improve the reliability of L-DACS1 system.

Key words: L-DACS1, DME interference, NLS, CS

中图分类号:

刘海涛，陈仟，王磊，李冬霞. 联合NLS 与CS 信号重构的DME 干扰抑制方法[J]. taptap下载安装安卓学报.

LIU Haitao, CHEN Qian, WANG Lei, LI Dongxia. DME interference suppression method based on joint NLS and CS signal reconstruction[J]. .

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