一种周期脉冲序列的搜索方法

摘要

针对周期脉冲信号具有的周期性、间隔性以及能量集中性,提出了一种在低信噪比条件下的周期脉冲信号检测方法.通过脉冲筛选、单脉冲定位、多脉冲匹配一系列步骤,实现周期脉冲信号的检测.同时,针对被分析信号的特征灵活进行阈值调节,能够进一步优化结果.该方法能够对具有周期脉冲特征的信号进行自动搜索、捕捉并进行标记,改进工程应用中人工判别信号特征的方式,并在一定程度上提高信噪比.最后,通过仿真实验验证了所提方法的有效性.%Aiming at the periodicity, interval, and energy concentration of periodic pulse signal, a periodic pulse signal detection method under low SNR condition is proposed. Through pulse screening, single pulse positioning, multi-pulse matching, the detection of periodic pulse signals is realized. At the same time, in accordance with the characteristics of the analytical signal, the threshold is flexibly adjusted, and the results could be further optimized. This method could automatically search, capture and mark the signals with periodic pulse characteristics, improve the way for artificially distinguishing the signal feature in engineering application, and raise the SNR to some extent. Finally, simulation experiments indicate the effectiveness of the proposed method.