一种认知MTD雷达脉间编码设计方法  

A Design Method for Inter-Pulse Coding for Cognitive Moving Target Detecting Radar

作　　者：史常丽[1] 张劲东[1] 邱晓燕[1] 吴悦[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京211106

出　　处：《雷达科学与技术》2016年第4期349-354,363,共7页Radar Science and Technology

基　　金：航空科学基金(No.20142052019);中央高校基本业务费资助项目(No.NJ2016042);江苏省产学研联合创新资金项目(No.BY2014003-5);江苏高校优势学科建设工程资助项目

摘　　要：认知动目标检测(MTD)雷达系统根据时变的杂波环境改变发射,从而改善回波的信杂噪比(SCNR)。针对在信号相关杂波中MTD雷达的发射设计问题,研究了基于慢时间域脉冲编码的MTD雷达模型,讨论了SCNR改善的可行性;提出了用于SCNR改善的脉间编码优化设计准则,给出了优化问题的简化方法,并针对锥约束下的二次型规划(CCQP)问题提出了一种基于简约梯度法的编码设计方法。仿真结果表明,慢时间域编码优化能够有效改善回波的SCNR,且该算法具有运算量小和实时性能好的特点。Cognitive moving target detection（MTD）radar system changes its transmission according to time-varying clutter environment,so as to improve the signal-clutter-and-noise ratio（SCNR）.Aiming at the problem of MTD radar transmit code design in the presence of signal-dependent clutter,we study MTD radar model based on pulse coding in slow-time domain and discuss the feasibility of SCNR improvement.The inter-pulse code optimization design criteria for improving SCNR is proposed and a simplified method of optimization problems is presented.Considering the cone constrained quadratic programming（CCQP）problem,an algorithm for optimizing the code based on reduced gradient is given.The simulation results show that slowtime domain coding can effectively improve SCNR and the algorithm has the characteristics of small computational complexity and good real-time performance.

关 键 词：认知MTD雷达 脉间编码设计 信杂噪比 锥约束下二次型规划 简约梯度法 

分 类 号：TN957.51[电子电信—信号与信息处理]