用于扩展目标检测的OFDM-MIMO雷达波形设计  

OFDM-MIMO Radar Waveform Design for Extended Target Detection

作　　者：庄珊娜[1] 贺亚鹏[1] 朱晓华[1] 

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：《南京理工大学学报》2012年第2期309-313,共5页Journal of Nanjing University of Science and Technology

基　　金：南京理工大学自主科研专项计划(2010ZDJH05)

摘　　要：为了检测扩展目标,该文提出一种已知统计特性的杂波和噪声背景下提高正交频率分集复用-多输入多输出(OFDM-MIMO)雷达检测性能的波形设计方法。利用扩展目标一维距离像的频率特性,基于匹配照射理论给出了雷达回波向量模型,在此基础上建立最大化检测信杂噪比的目标函数;通过交替迭代搜索获得优化发射波形和最优接收滤波器。仿真结果表明,经调制的OFDM-MIMO雷达发射波形具有稳健的抗杂波性能,可提高检测信杂噪比,改善OFDM-MIMO雷达检测性能。To detect an extended target,a waveform design method to improve the detection performance of the orthogonal frequency division multiplexing-multiple input multiple output（OFDM-MIMO）radar is proposed under the background of the clutter plus noise with known statistic characters.Utilizing the match illumination theory and the frequency character of one dimension range profiles of the extended target,the radar echo vector model is given,and the target function to maximize the detection of the signal-to-clutter-plus-noise ratio（SCNR） is built.The optimum transmit waveforms and their corresponding receive filers are obtained by using an alternate iterative algorithm.The simulation results show that SCNR increases,and the modulated OFDM-MIMO radar transmitting waveforms have robust performance of clutter resistance and can improve the SCNR and the OFDM-MIMO radar detection performance.

关 键 词：正交频率分集复用 多输入多输出雷达 扩展目标检测 波形设计 匹配照射 信杂噪比 检测概率 

分 类 号：TN958.8[电子电信—信号与信息处理]