摘要
对比分析了周期图法、倒谱法和自相关法等算法对非合作水声直扩信号的检测效果。利用信号分段加窗函数和求和平均等方法,对倒谱法和自相关法进行了改进,并与传统方法在不同采样长度、不同码片长度下进行对比分析。在相同的采样长度和带宽条件下,Welch法检测效果较好。
The effects of periodic graph method, cepstrum method and autocorrelation method on the detection of non-cooperative underwater acoustics DSSS signals are compared and analyzed. The cepstrum method and autocorrelation method are improved by using signal segmentation windowing function and summation averaging method. Compared with traditional methods, different sampling lengths and different chip lengths are used for comparative analysis. Under the same sampling length and bandwidth conditions, the Welch method has a better detection effect.
作者
张铮
ZHANG Zheng(715th Research Institution of China Shipbuilding Industry Corporation, Hangzhou 310023)
出处
《舰船电子工程》
2019年第3期156-161,共6页
Ship Electronic Engineering
关键词
非合作
水声直扩信号
周期图法
改进倒谱法
改进自相关法
non-cooperation
underwater acoustics DSSS signals
periodic graph method
improved cepstrum
improved autocorrelation
