一种组合时频分布在跳频信号参数估计中的应用

doi:10.3969/j.issn.1001-2400.2010.06.028

J4 ›› 2010, Vol. 37 ›› Issue (6): 1137-1142.doi: 10.3969/j.issn.1001-2400.2010.06.028

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Combination of Wigner-Ville distribution and its application to blind parameter estimation of frequency-hopping signals

FENG Tao^1,2;YUAN Chao-wei¹

(1. School of Info. and Comm. Eng., Beijing Univ. of Posts and Tele., Beijing 100876， China;
2. 54th Research Inst. of the Chinese Electronic Tech. Corp. , Shijiazhuang 050081， China)

Received:2009-11-30 Online:2010-12-20 Published:2011-01-22
Contact: FENG Tao E-mail:fengtao54@sina.com

Abstract

Abstract:

To estimate the parameters of frequency-hopping signals, a new combination of Wigner-Ville distribution based on frequency decomposition is put forward according to the characteristics of frequency-hopping signals. First, a multi-component frequency-hopping signal is decomposed into multiple single-component signals with a group of band filters. Then the WVD of each component is summed up to form a new time-frequency distribution. Theoretical analysis and simulation result show that the new combination of Wigner-Ville distribution is effective to the reduction in cross-term interference of frequency-hopping signals. Compared with the existing method, this new method preserves a higher time-frequency resolution. Therefore, it is more suitable to time-frequency analysis and parameter estimation of frequency-hopping signals.

Key words: frequency-hopping signals, combination of Wigner-Ville distribution, cross-term, time-frequency resolution

FENG Tao;YUAN Chao-wei. Combination of Wigner-Ville distribution and its application to blind parameter estimation of frequency-hopping signals[J].J4, 2010, 37(6): 1137-1142.

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Combination of Wigner-Ville distribution and its application to blind parameter estimation of frequency-hopping signals

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