一种新的椭圆球面波信号时频域滤波方法  

A Novel Time-Frequency Filter Method for Prolate Spheroidal Wave Function Signal

作　　者：王媛媛 毛忠阳 陆发平 WANG Yuanyuan;MAO Zhongyang;LU Faping(The 91001st Unit of PLA,Beijing 100841,China;Naval Aviation University,Yantai Shandong 264001,China;The 91206th Unit of PLA,Qingdao Shandong 266109,China)

机构地区：[1]91001部队,北京100841 [2]海军航空大学,山东烟台264001 [3]91206部队,山东青岛266109

出　　处：《海军航空大学学报》2023年第2期173-178,共6页Journal of Naval Aviation University

基　　金：国家自然科学基金(61701518);山东省“泰山学者”建设工程专项经费基金(ts20081130)。

摘　　要：针对如何在时频域降低干扰噪声对椭圆球面波函数(Prolate Spheroidal Wave Functions,PSWFs)信号时频域分布特性的影响,引入精细滤波,提出了1种新的椭圆球面波信号时频域滤波方法。仿真结果表明,所提方法在时频域以能量峰值点为基准,构造以距离为依据的滤波算子调节参数,能够有效抑制噪声对PSWFs信号时频域分布特性的影响,提高信号局部区域的能量聚集性。Aiming at how to reduce the influence of interference noise on the time-frequency distribution characteristics of prolate spheroidal wave functions(PSWFs)signals in the time-frequency domain,a new time-frequency domain filtering for the PSWFs signal is proposed by introducing fine filtering.Simulation analysis show that the proposed method takes the en⁃ergy peak point as the reference in the time-frequency domain and constructs the filter operator adjustment parameters based on the distance,which can effectively suppress the influence of noise on the time-frequency distribution characteris⁃tics of the PSWFs signal,at the same time,can improve the energy aggregation degree of the signal locally.

关 键 词：椭圆球面波 时频分布特性 时频域滤波 精细滤波 

分 类 号：TN911.3[电子电信—通信与信息系统]