基于加权检测算法的低频时码干扰检测研究

Research on low frequency time code interference detection based on weighted detection

针对低频时码信号的干扰检测问题,提出了一种新的加权检测算法。该算法通过两个加权因子,对信号平均功率和载波功率进行加权计算得到参考门限,实现对干扰的检测判决。相比于干扰检测中常用的能量检测算法,改进后的加权检测算法受干扰影响较小,对干扰特别是大功率干扰的检测有效率更高,在信噪比SNR>0时,干扰检测有效率最高可达到98.3%。此外,该算法可根据信号信噪比灵活调整参考门限,是一种适用于低频时码信号的干扰检测算法。

A new signal weighting detection algorithm is proposed for interference detection in the low-frequency time code signals.The algorithm uses two weighting factors to average the signal power and carrier power,which is used as referencing threshold for the detection and judgment of interference.Compared with the commonly used energy detection algorithms for interference detection,the proposed weighted detection algorithm is less affected by interference,and has higher detection efficiency in detecting interference,especially for the high-power interference.When signal to noise ratio(SNR)>0,its interference detection rate can reachto 98.3%.In addition,the algorithm can flexibly adjust the referencing threshold according to SNR.This signal weighting detection algorithm is a suitable interference detection algorithm for low-frequency time code signals.