阵元选择下的MIMO雷达发射波束赋形  

Transmit Beamforming for MIMO Radar by Array Element Selection

作　　者：刘静茹 肖雷 韩玉兵[1] LIU Jingru;XIAO Lei;HAN Yubing(School of Electronic Engineering and Optoelectronics,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《制导与引信》2025年第1期24-31,共8页Guidance & Fuze

基　　金：国家自然科学基金(62371236)。

摘　　要：,针对多输入多输出(multi-input multi-output,MIMO)雷达发射波束方向图匹配中协方差矩阵求解复杂度较高的问题,提出了一种基于交替投影(alternating projection,AP)法的方向图直接优化设计方法。该方法在恒模约束或者峰值平均功率比(peak to average power ratio,PAPR)约束下对发射波形进行优化,并将天线阵元位置作为方向图优化的额外自由度,按照一定的准则,逐步删减阵元直至阵元数达到预设值。在此迭代过程中,不断交替投影得到优化的发射波形和匹配方向图。仿真结果表明,该方法有较优的方向图匹配性能以及较快的收敛速度,适用于阵列规模较大的情况。Aiming at the high complexity of solving covariance matrix in multi-input multi-output(MIMO)radar transmit beampattern matching,a direct optimal design method of transmit beampattern based on alternating projection(AP)was proposed.The method optimized the transmit waveform under constant mode constraint or peak to average power ratio(PAPR)constraint,and the array element position was taken as an extra degree of freedom in the transmit beampattern optimal design.According to certain criteria,the array elements were gradually deleted until the predetermined number of array elements was reached.In this iterative process,the optimized transmit waveform and matching beampattern were obtained by alternating projection.The simulation results show that the proposed method has better beampattern matching performance and faster convergence speed,and is suitable for large scale antenna array.

关 键 词：波束赋形 波束方向图匹配 阵元选择 交替投影 

分 类 号：TN95[电子电信—信号与信息处理]