重频抖动脉冲信号分选研究

针对累积差值直方图法、序列差值直方图法对重频抖动脉冲信号的分选能力差,基于PRI变换的重复间隔估计算法计算量比较大难以做到实时处理的问题,对序列差值直方图法进行改进。利用交叠小箱法进行直方图统计,很好地兼顾了处理速度和重频估计的准确性,可有效分选重频抖动的雷达脉冲信号;在脉冲串检测时,将脉宽用作抖动重复间隔序列抽取的第二判决参数,增加脉冲检测的可靠性。仿真结果表明,在不明显增加运算量的情况下,序列差值直方图改进算法能很好地分选脉冲重复间隔抖动量10%以内的脉冲信号。

Research on Jittered PRF Pulse Signals' Deinterleaving

The cumulative difference histogram(CDIF) and sequential difference histogram(SDIF) algorithms can't deinterleave the PRI jittered radar signals perfectly,and the computation of PRI estimation algorithm based on the PRI transform is large which leads that this algorithm can't process in real-time.For these reasons,the SDIF algorithm is improved in the paper.Overlapped bins are used in HIST computing,which pays attention to the processing speed and veracity of PRI estimation and makes the SDIF algorithm process the PRI jittering radar signals effectively.While the pulse searching is implemented,PW is employed as the second parameter in the pulse searching which increases the credibility of pulse searching.The simulation result indicates that the improved SDIF algorithm can effectively process the radar signals with PRI jittering rate within 10%,and the computation amount doesn't increase distinctly.