集中式MIMO组网雷达系统波形设计  

Waveform Design for Netted Colocated-MIMO Radar System

作　　者：张翔[1] 文才 许金金 孟一诺 Zhang Xiang;Wen Cai;Xu Jinjin;Meng Yinuo(Northwestern University,Xi’an 710127,China)

机构地区：[1]西北大学,陕西西安710127

出　　处：《航空科学技术》2024年第8期85-97,共13页Aeronautical Science & Technology

基　　金：航空科学基金(20182098002)。

摘　　要：波形设计是集中式MIMO组网雷达信号处理的关键技术之一。为了提高该系统在杂波或干扰下的目标探测能力,同时兼顾硬件兼容性以及所设计波形良好的模糊函数和脉冲压缩特性,本文考虑在恒模约束和波形相似性度量下构建关于雷达输出信杂噪比(SCNR)的优化模型;通过对原非凸问题的等价转换,提出了一种基于连续凸近似的多项式时间迭代算法,并分析了其收敛性;为了进一步降低计算复杂度,提出了一种基于梯度投影(GP)的算法。最后,对所提方法进行了仿真验证,结果表明,该方法能够为组网雷达系统下各发射站点的波形设计提供一种新的可行方法。Waveform design is one of the key technologies in radar signal processing for the netted collocated Multiple Input Multiple Output(MIMO)radar system.To improve the target detection capability of the system under clutter interference while taking into account hardware compatibility,good ambiguity and pulse compression properties of the designed waveform,the paper considers constructing a model for the radar output Signal to Clutter and Noise Ratio(SCNR)under constant modulus constraints and waveform similarity metrics;then by equivalent transformation of the original non-convex problem,a polynomial-time iterative algorithm based on successive convex approximation is proposed and analyzed for convergence.To further reduce the computational complexity,the paper also proposes an algorithm based on Gradient Projection(GP).Finally,the proposed method is simulated and verified,and the results show that the method can provide a new feasible method for the waveform design of each transmitting site under the netted radar system.

关 键 词：组网雷达系统 波形相似性 可行点追踪-连续凸近似 梯度投影 

分 类 号：TN958[电子电信—信号与信息处理]