时变信号加窗和光滑加窗Wigner-Ville分布的参数定义

Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467) Pub Date : 1900-01-01 DOI:10.1109/ISSPA.2001.950208

A. Sha'ameri

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引用次数: 8

摘要

采用加窗Wigner-Ville分布(WWVD)和光滑加窗Wigner-Ville分布(SWWVD)分析时变信号。所使用的两类信号是双分量线性调频和频移键控(FSK)信号。分析了两种信号双线性积的时滞特性，并利用其建立了WWVD和SWWVD的参数。一般来说，使用SWWVD比使用WWVD获得更精确的时频表示。基于主瓣宽度(MLW)和信干扰比(SNI)，对得到的时频表示的精度进行量化。

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Parameters definition for the windowed and smooth windowed Wigner-Ville distribution of time-varying signals

The windowed Wigner-Ville distribution (WWVD) and smooth windowed Wigner-Ville distribution (SWWVD) are used to analyze time-varying signals. Two classes of signals used are the dual-component linear FM and frequency shift-keying (FSK) signals. The time-lag characteristics of the bilinear product of both signals are analyzed and used to setup the parameters of the WWVD and SWWVD. In general, a more accurate time-frequency representation is obtained using the SWWVD compared to the WWVD. The accuracy of the resulting time-frequency representation is quantified based on the mainlobe width (MLW) and signal-to-interference (SNI) ratio.

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Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467)

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