文档介绍：正交波形MIMO雷达信噪比分析*
李军何子述叶胜辉
(电子科技大学电子工程学院, 成都 610054)
摘要: 正交波形MIMO雷达各阵元发射相互正交的信号波形, 采用低增益的宽波束照射探测空域。从信号模型和信号处理结构入手, 分析讨论了MIMO雷达和传统相控阵雷达的信噪比问题, 从理论上证明了MIMO雷达要维持与相控阵雷达相当的检测性能, 需要采用更长的积累时间。文中还简要分析了不同正交信号形式下的信噪比差异。构建了MIMO雷达系统仿真平台, 通过仿真实验测试了MIMO雷达在不同积累时间下的信噪比, 并与传统相控阵进行了比较, 从而验证了理论分析的正确性。
关键词: MIMO雷达;信噪比;脉冲积累;多相编码;线性调频
中图分类号: TN95 文献标识码: A 国家标准学科分类代码:
Analysis of signal-noise-ratio of orthogonal waveform MIMO radar
Li Jun He Zishu Ye Shenghui
(School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China)
Abstract: Each of elements in orthogonal MIMO radar transmits orthogonal waveform. It adopts low-gain and broad beam to cover the surveillance area. In this paper, the signal model and signal processing structure of MIMO radar are introduced, and then the signal-noise-ratio (SNR) of MIMO radar and traditional phased array radar are analyzed. It is proved theoretically that MIMO radar needs much longer integration time than phased array radar to reach parative detection performance. The SNR of different orthogonal signal form is briefly discussed in the paper. A MIMO radar simulation system is set up, and through simulation experiments the SNRs of MIMO radar in different integration time are tested pared with that of phased array. The results approved the correctness of the analysis.
Keywords: MIMO radar; SNR, pulse