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基于索引调制OFDM雷达通信共享信号压缩感知方法研究

左家骏 杨瑞娟 李晓柏 李东瑾

左家骏, 杨瑞娟, 李晓柏, 李东瑾. 基于索引调制OFDM雷达通信共享信号压缩感知方法研究[J]. 电子与信息学报, 2020, 42(12): 2976-2983. doi: 10.11999/JEIT190740
引用本文: 左家骏, 杨瑞娟, 李晓柏, 李东瑾. 基于索引调制OFDM雷达通信共享信号压缩感知方法研究[J]. 电子与信息学报, 2020, 42(12): 2976-2983. doi: 10.11999/JEIT190740
Jiajun ZUO, Ruijuan YANG, Xiaobai LI, Dongjin LI. A Compressed Sensing Method for Joint Radar and Communication System Based on OFDM-IM Signal[J]. Journal of Electronics and Information Technology, 2020, 42(12): 2976-2983. doi: 10.11999/JEIT190740
Citation: Jiajun ZUO, Ruijuan YANG, Xiaobai LI, Dongjin LI. A Compressed Sensing Method for Joint Radar and Communication System Based on OFDM-IM Signal[J]. Journal of Electronics and Information Technology, 2020, 42(12): 2976-2983. doi: 10.11999/JEIT190740

基于索引调制OFDM雷达通信共享信号压缩感知方法研究

doi: 10.11999/JEIT190740
基金项目: 国家自然科学基金(61271451)
详细信息
    作者简介:

    左家骏:男,1990年生,博士,研究方向为雷达信号处理与雷达通信一体化

    杨瑞娟:女,1964年生,教授,博士生导师,主要研究方向为通信信号处理

    李晓柏:男,1983年生,博士,研究方向为现代通信技术、数字信号处理、雷达通信一体化

    李东瑾:男,1992年生,博士,研究方向为一体化系统智能应用

    通讯作者:

    左家骏 zuojiajun59@126.com

  • 中图分类号: TN95

A Compressed Sensing Method for Joint Radar and Communication System Based on OFDM-IM Signal

Funds: The National Natural Science Foundation of China (61271451)
  • 摘要: 针对在雷达通信一体化(RadCom)系统中正交频分复用(OFDM)共享信号通信速率不高、可靠性较差的问题,该文提出一种采用子载波索引调制(IM)的OFDM共享信号方案(OFDM-IM)以及对应的基于压缩感知(CS)的雷达信号处理算法。该方案在发射端采用IM调制增强OFDM信号通信质量,在雷达接收端采用CS技术获取目标的距离-速度2维超分辨图像,进一步采用快速分段重构、2次相参积累的方法降低算法的计算复杂度。仿真实验表明,相比于传统算法,该方法能显著提升对OFDM-IM共享信号的处理性能,并实现超低距离副瓣,是一种能够同时增强雷达与通信性能的一体化共享信号方案。
  • 图  1  OFDM-IM信号产生示意图

    图  2  OFDM-IM信号幅度谱(N=512, Ns=8, Ks=4)

    图  3  OFDM-IM信号误比特率

    图  4  MSD-CS算法信号处理流程图

    图  5  单脉冲距离像

    图  6  不同信噪比下MSD和MSD-CS算法仿真结果

    图  7  不同子脉冲数条件下PSL和TBR随信噪比变化曲线(Ns=8, Ks=4)

    图  8  不同有效载波数条件下PSL和TBR随信噪比变化曲线(P=8)

    图  9  运行时间随分段数变化曲线

    表  1  OFDM信号参数

    信号参数取值
    载波频率2.4 GHz
    信号带宽20 MHz
    脉冲宽度26.8 μs
    OFDM数据段长度25.6 μs
    循环前缀长度1.2 μs
    子载波数512
    相参积累的脉冲数64
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-09-25
  • 修回日期:  2020-10-20
  • 网络出版日期:  2020-10-23
  • 刊出日期:  2020-12-08

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