分布式全相参雷达相参性能分析

来源：　作者：　时间：2015-01-21

【摘要】该文针对多脉冲发射协同结构的分布式全相参雷达，首先建立了全相参模式下的信号模型，然后推导了输出信噪比增益(oSNRg)的解析式，并基于相干参数估计的克拉美-罗界(CRB)，利用多项式拟合，获得了oSNRg上界的数值解。结果表明：增加发射天线数或脉冲数能够提高oSNRg；而增加接收天线数能否提高oSNRg取决于输入信噪比大小，输入信噪比较大时则oSNRg随之提高，较小时反而随之下降。最后的仿真实验验证了研究结论的正确性。

【关键词】雷达分布式全相参输出信噪比增益多项式拟合

Coherence Performance Analysis for Distributed Aperture Coherent Radar

Abstract： For distributed aperture coherent radar with cooperative architecture and pulse trains, the signal mode in fully coherent work mode is proposed firstly. Then the analysis formula of output Signal-to-Noise Ratio gain (oSNRg) is derived, and the performance bound of oSNRg is developed by using polynomial fitting based on Cramer-Rao Bounds (CRB) of coherence parameters estimation. It is concluded that more transmitters or pulses make higher oSNRg. However, as the number of receivers increase, if the input SNR is high sufficiently, the oSNRg will gradually improve; if not, it will worsen. Finally, numerical examples demonstrate the validity of the theoretical results.

Keywords： Radar Distributed aperture Fully coherent Output Signal-to-Noise Ratio gain (oSNRg) Polynomial fitting

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