陈龙永,,
张福博,,
李焱磊,
吴一戎
中国科学院空天信息创新研究院 北京 100190
微波成像技术国家级重点实验室 北京 100190
中国科学院大学 北京 100049
基金项目:北京市科技新星计划(Z201100006820014)，国家部委基金
详细信息
作者简介:赵玉振(1995–)，男，安徽人，中国科学院空天信息创新研究院博士研究生，主要研究方向为雷达通信一体化波形设计、MIMO SAR波形设计等
陈龙永(1979–)，男，安徽人，博士，研究员，主要研究方向为SAR三维成像技术理论与方法和电子系统一体化集成技术
张福博(1988–)，男，河北人，博士，副研究员，主要研究方向为SAR三维成像技术和高分辨率宽测绘带成像技术等
李焱磊(1983–)，男，河北人，博士，副研究员，主要研究方向为新体制雷达信号处理、可重构异构计算技术和穿墙雷达技术等
吴一戎(1963–)，男，安徽人，中国科学院院士，研究员，研究方向为微波成像理论、微波成像技术和雷达信号处理
通讯作者:陈龙永 lychen@mail.ie.ac.cn
张福博 zhangfubo8866@126.com
责任主编：杨瑞娟 Corresponding Editor: YANG Ruijuan中图分类号:TP722.6
计量
文章访问数:775
HTML全文浏览量:145
PDF下载量:210
被引次数:0
出版历程
收稿日期:2021-03-12
修回日期:2021-04-19
网络出版日期:2021-05-13
刊出日期:2021-06-28
A New Method of Joint Radar and Communication Waveform Design and Signal Processing Based on OFDM-chirp
ZHAO Yuzhen,CHEN Longyong,,
ZHANG Fubo,,
LI Yanlei,
WU Yirong
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China
National Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China
University of Chinese Academy of Sciences, Beijing 100049, China
Funds:Beijing Science and Technology New Star Program (Z201100006820014), The National Ministries Foundation
More Information
Corresponding author:CHEN Longyong, lychen@mail.ie.ac.cn;ZHANG Fubo, zhangfubo8866@126.com
摘要
摘要:雷达通信一体化波形设计是近年来的研究热点。有****提出利用正交频分复用(OFDM)信号的奇偶载波分别调制雷达与通信功能来实现一体化。但OFDM通信系统一般采用循环前缀(CP)来避免多径效应带来的载波间干扰(ICI)和符号间干扰(ISI)，这会降低能量利用率，并会形成虚假目标，影响雷达性能；此外，传统的OFDM一体化信号对多普勒比较敏感，微小的多普勒频偏也会带来正交性能的严重下降。该文在此基础上提出了一种新的波形设计和处理方法。该方法利用空白保护间隔替代循环前缀，可以在对抗多径效应的同时避免出现由于循环前缀引入的虚假目标，有效防止载波间干扰和符号间干扰。在信号处理方法上，该文提出利用雷达发射信号的先验信息进行信道估计与补偿多普勒频偏的方法。与传统方法相比，该文方法降低了系统在导频与训练序列等资源上的开销，提升了能量利用率和频谱效率，并且改善了峰值旁瓣比(PSLR)、积分旁瓣比(ISLR)和通信误码率(BER)等指标。仿真实验验证了该文方法的有效性。
关键词:雷达通信一体化(JRC)/
正交频分复用(OFDM)/
多径效应/
多普勒频偏/
信道估计
Abstract:Waveform design of joint radar and communication has become a focus of intense research in recent years. Some scholars have proposed to use the odd and even carrier of Orthogonal Frequency Division Multiplexing (OFDM) signal to modulate the radar and communication functions, respectively, to realize the integration. However, OFDM systems generally use cyclic prefix to avoid Inter-Carrier Interference (ICI) and Inter-Symbol Interference (ISI) caused by multipath effects, reducing energy utilization and creating false targets, which affect radar performance. In addition, the traditional OFDM integrated signal is more sensitive to Doppler shift. A small Doppler frequency offset will also cause a considerable drop in orthogonal performance. On this basis, this paper proposes a new waveform design and processing method. This method uses blank guard intervals to replace cyclic prefixes, which can resist multipath effects while avoiding false targets introduced by cyclic prefixes, effectively preventing ICI and ISI. In terms of signal processing methods, this paper proposes a method for channel estimation and Doppler compensation using the priori information of the radar signal. Compared with the traditional method, this new method reduces the system’s resource overhead, such as pilot frequency and training sequence. It improves energy utilization and spectrum efficiency. The peak side lobe ratio, integration side lobe rate, and bit error ratio are also improved. Simulation experiments verify the effectiveness of this method.
Key words:Joint Radar and Communication (JRC)/
Orthogonal Frequency Division Multiplexing (OFDM)/
Multipath effect/
Doppler shift/
Channel estimation
PDF全文下载地址:
https://plugin.sowise.cn/viewpdf/198_377c95ac-e597-488f-87c8-7f8f561d6bff_R21028
