摘要
考虑了目标先验知识未确知条件下,提升基于多输入多输出正交频分复用(MIMO-OFDM)雷达的空时自适应处理(STAP)最差条件下检测概率的稳健波形设计问题。在发射波形恒模特性及目标参数不确定凸集约束下,基于最大化输出信干噪比(SINR)准则,构建了提高最差条件下MIMO-OFDM-STAP检测性能的极大极小波形优化问题。为求解所得NP-hard问题,先将发射波形恒模特性松弛为低峰均比约束,而后利用对角加载(DL)将其重构为可有效求解的半定规划(SDP)问题。与传统非相关信号和主流非稳健算法相比,数值仿真验证了该算法可显著提升MIMO雷达目标检测的稳健性。
The robust waveform design issue is considered here to improve the worst-case detection performance of multi-input multi-output orthogonal frequency division multiplexing(MIMOOFDM)radar based STAP in the case of imperfect target prior knowledge.With the transmitting waveform constant characteristic and the convex set of target parameter uncertainty,under the criterion of maximizing the output signal-to-interference-and-noise-ratio(SINR),the max-min waveform optimization problem can be constructed to better the worst-case detection performance of MIMOOFDM-STAP.In order to solve the resultant NP-hard problem,the constant envelope characteristic of the transmitting waveform can be firstly relaxed as the low peak-average-ratio(PAR)constraint,in what follows,this issue can be reformulated as a semidefinite programming(SDP)one by exploiting diagonal loading(DL)to acquire an effective solution.In comparison with the traditional uncorrelated signals and state-of-the-art non-robust algorithm,numerical results verify that the robustness of the target detection of MIMO radar can be improved considerably via the proposed algorithm.
作者
姚遥
周吉生
李琼
王洪雁
YAO Yao;ZHOU Ji-sheng;LI Qiong;WANG Hong-yan(School of Physics and Telecommunication Engineering,Zhoukou Normal University,Zhoukou 466000,China;Department of Automotive Engineering,Zhoukou Vocational College of Science and Technology,Zhoukou 466000,China;Zhoukou Academy of Agricultural Science,Zhoukou 466000,China;School of Information Engineering,Dalian University,Dalian 116622,China)
出处
《火力与指挥控制》
CSCD
北大核心
2020年第12期57-63,共7页
Fire Control & Command Control
基金
国家自然科学基金项目(61301258,61401526)
国家博士后面上项目一等(2016M590218)
国家自然科学基金应急管理基金资助项目(11847113)。
关键词
多输入多输出雷达
正交频分复用
空时自适应处理
稳健波形优化
半定规划
Multi-input multi-output(MIMO)radar
orthogonal frequency division multiplexing(OFDM)
space-time adaptive processing(STAP)
robust waveform optimization
semidefinite programming(SDP)
作者简介
姚遥(1984-),男,河南周口人,硕士,讲师。研究方向:MIMO雷达信号处理。
