一种基于自相关函数的幂律检测器  

A new power-law detector based on autocorrelation function

作　　者：罗博[1,2] 孙超[1] 

机构地区：[1]西北工业大学声学工程研究所,西安710072 [2]杭州应用声学研究所,杭州310012

出　　处：《应用声学》2010年第5期352-357,共6页Journal of Applied Acoustics

摘　　要：针对水下高斯噪声中非高斯瞬态信号的检测问题,在研究Nuttall提出的power-law(幂律)检测器的基础上,为了提高其检测性能,依据信号和噪声的自相关函数的差异,提出了基于自相关函数的power-law检测器,并对其参数的最佳选取及检测性能进行了仿真研究。仿真结果表明,基于自相关函数的检测器较基于DFT的power-law检测器性能有所提高,有一定的可行性。For detection of underwater non-Gaussian transient signals buried in Gaussian noise, a power-law processor operating on autocorrelation function （ACF） of received signal is proposed here in order to improve the detection performance of the original detector based on DFT after a review of the latter detector. The optimum parameter for the new detector and its detection performance is studied using simulation analysis. The simulation results indicate that power-law processor based on ACF slightly outperforms that based on DFT.

关 键 词：幂律检测器 瞬态信号 自相关函数 检测性能 

分 类 号：TN911.1[电子电信—通信与信息系统]