干扰条件下基于平均信息量的机载MIMO雷达天线和信号联合优化研究

项目名称： 干扰条件下基于平均信息量的机载MIMO雷达天线和信号联合优化研究

项目编号： No.61302153

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 李伟

作者单位： 中国人民解放军空军工程大学

项目金额： 25万元

中文摘要： 相干MIMO雷达发射和接收多个相互正交或有一定相关性的信号，天线阵列等效为发射与接收阵列卷积，具有基于较小尺寸天线获得高的目标参数估计性能的潜力，现有研究大多针对天线或信号分别进行优化来达到提升雷达性能的目的，而且没有考虑目标对雷达实施干扰时的参数估计问题。项目针对机载二维MIMO雷达，通过剖析影响参数估计性能的关键因素，立足现有干扰手段，基于平均信息量，建立干扰条件下参数估计性能描述模型，并引入雷达天线与信号等因子，构建参数估计性能优化准则，通过天线和信号波形的联合优化，克服天线过于稀疏会导致栅瓣的缺点，避免传统优化准则的不足，保证天线满足信号发射需求，并消除信号对应用场景的限制，提升参数估计性能。本项目开展及其预期研究成果将为新技术在新领域的应用提供理论基础和技术支撑，对保障我国防空反导和空中作战能力有重要意义。

中文关键词： 多输入多输出雷达；天线设计；波形设计；互信息量；Stackelberg博弈

英文摘要： Coherent MIMO radar transmits and receives multiple orthogonal or correlated signals, and has the potential of getting high performance of parameter estimation. But nearly all existing design of MIMO radar are focused on individual optimization of signal or antenna, at the same time, existing studies have not considered the problem of parameter estimation under jamming. The project studies the airborne two dimensional MIMO radar for parameter estimation. After those key factors affecting the performance of estimation are analyzed and mastered, based on possible jamming techniques,the model of performance of parameter estimation under jamming is gotten on the base of average quantity of information, then the principle of joint optimization of antenna array formation and signal is constructed, through joint optimization of antenna and signal, grating lobes will be eliminated which are caused by sparse antenna, antenna will be made to meet the requirement of signal transmission, the limit on applicable field caused by signal will be removed. The result of the project will improve the application of new techniques in new fields by providing theory base and technique support, which will be valuable for air-defense, countering missiles and air-combat.

英文关键词： multi-input multi-output radar；antenna design；waveform design；mutual information；Stackelberg game