脉冲雷达微弱目标的IPPS检测

Dim Target Detection of Pulsed Radar Based on IPPS

针对单频/窄带脉冲体制雷达系统,研究了微弱目标的检测问题。首先给出了目标信号和接收机噪声的瞬态“极化”投影序列(IPPS)表征方法,导出了接收机噪声的IPPS到期望点广义距离的统计特性。在此基础上,利用雷达目标回波信号在相邻脉冲之间的相关性及接收机噪声在相邻脉冲之间随机的特性,借鉴极化积累的思想,提出了一种微弱目标的IPPS检测算法,仿真结果表明了该算法比常规脉冲匹配检测性能提高了近10dB左右,极大地改善了脉冲体制雷达的探测性能。

The dim target detection problem of narrowband pulsed radar system is studied in this paper. Firstly, the characterization of instantaneous “polarization” projection sequences (simplified as IPPS) of target echo and receiver noise are presented. Then, statistics of generalized distance between receiver noise and expected polarization signal are also derived. Thereby, taking advantage of the correlation of adjacent pulse radar echo and the stochastical characteristics of receiver noise, a novel dim target detection algorithm based on IPPS is presented. Computer simulations show that the detection algorithm is very effective.