OFDM雷达信号联合优化设计与处理方法  

Joint Optimization Method of OFDM Radar Signal Design and Processing

作　　者：王舒玉 马智杰 张天贤 杨建宇 WANG Shuyu;MA Zhijie;ZHANG Tianxian;YANG Jianyu(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu,Sichuan 611731,China)

机构地区：[1]电子科技大学信息与通信工程学院,四川成都611731

出　　处：《信号处理》2022年第11期2299-2307,共9页Journal of Signal Processing

基　　金：国家自然科学基金(61971109)。

摘　　要：本文针对机载雷达探通一体化信号设计与处理的难匹配问题,提出正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)雷达信号联合优化设计与处理方法。首先,基于机载探通一体化系统发射和接收信号链路建立线性接收模型,接着基于最小二乘估计理论提出雷达脉压算法和通信解调算法;然后,分别推导雷达脉压和通信解调后的输出信噪比(Signal to Noise Ratio,SNR),以雷达和通信输出SNR加权最大化为目标建立优化问题模型。由于该优化问题是一个NP难问题,本文提出降次-交替方向乘子法获取近似解。最后,通过仿真验证本文所提方法可以通过参数动态调整,适应探通一体的需求,并保持探测和通信性能。In this paper,focusing on the mismatching problem between the integrated signal design method and signal pro⁃cessing approach of airborne radar,a joint optimization method of orthogonal frequency division multiplexing(OFDM)ra⁃dar signal design and processing is proposed.Firstly,a linear receiving model was established based on transmitting and receiving links and we proposed pulse compression and communication demodulation methods according to the least square estimation theory.Then,the signal-to-noise ratio(SNR)after radar pulse compression and the SNR after communication demodulation were deduced individually and a weighted joint optimization problem was formulated.Since the optimization problem is NP hard,we solved it by the alternated direction method of multiplier.Finally,the simulation results showed that,by adjusting the parameters dynamically,the proposed method can meet the requirements of radar and communica⁃tion integration and maintain the performance of detection and communication.

关 键 词：正交频分复用信号 最小二乘估计理论 探通一体化 信号设计 

分 类 号：TN95[电子电信—信号与信息处理]