LFM脉冲信号的联合互相关实时检测算法
The joint cross-correlation real-time detection algorithm of LFM pulse signal

针对线性调频(Linear Frequency Modulated, LFM)脉冲信号在水声跟踪系统中的实时检测问题,提出了一种基于互相关的联合检测算法。该算法将接收到的声信号分别与修正后副本及上周期实际声信号样本进行相关,并按照一定加权系数将两次互相关数据进行融合处理,实现LFM脉冲信号的有效检测。经过仿真分析及湖上试验,证明该算法具有较高的检测精度,是水声信号处理的一种实用方法,可有效提高水声跟踪系统的检测性能。
Aiming at the problem in the real-time detection of LFM pulse signal in underwater acoustic tracing system, a joint cross-correlation detection algorithm based on cross correlation is raised. The algorithm correlates the acoustic signal received to the backup copy revised and the real acoustic signal in the last period, and makes the two copy cross-correlation data fusing with a certain weighting coefficient. The purpose is to realize the valid detection of LFM pulse signal. It comes to a conclusion that the algorithm has high precise detection ability, and this is a perfect method in underwater acoustic signal processing to improve the detection performance of underwater acoustic tracing system effectively.