Signal synthesis and positive time-frequency distributions

被引：5
|
作者：
Shah, SI [1 ]
El-Jaroudi, A [1 ]
Loughlin, PJ [1 ]
Chaparro, LF [1 ]
机构：
[1] GIK Inst Engn Sci & Technol, Fac Elect Engn, Swabi 23460, NWFP, Pakistan
来源：
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS | 2000年 / 337卷 / 04期
关键词：
positive time-frequency distributions; signal synthesis; mean squared error; minimum cross entropy; evolutionary spectrum; generalized transfer function;
D O I：
10.1016/S0016-0032(00)00037-5
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A method for obtaining a generalized transfer function (GTF) of a linear time-varying system based on evolutionary spectral theory is proposed. This GTF can be used to synthesize the signal, and its magnitude squared function results in the signal's positive time-frequency distribution that satisfies the marginals (i.e,, a Cohen-Posch TFD). The procedure allows any prior estimate of the GTF to be modified such that the resulting posterior GTF is closest in the least square sense to the prior and satisfies the above-mentioned properties. Examples are presented to illustrate the performance of the method. (C) 2000 The Franklin Institute. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：317 / 328
页数：12
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