DocumentCode :
1372501
Title :
Modulation identification of digital signals by the wavelet transform
Author :
Ho, K.C. ; Prokopiw, W. ; Chan, Y.T.
Author_Institution :
Dept. of Electr. Eng., Missouri Univ., Columbia, MO, USA
Volume :
147
Issue :
4
fYear :
2000
fDate :
8/1/2000 12:00:00 AM
Firstpage :
169
Lastpage :
176
Abstract :
There is a need, for example in electronic surveillance, to determine the modulation type of an incoming signal. The use of the wavelet transform for modulation identification of digital signals is described. The wavelet transform can effectively extract the transient characteristics in a digital communication signal, yielding distinct patterns for simple identification. Three identifiers for classifying PSK and FSK, M-ary PSK and M-ary FSK are considered. Statistics for hypothesis testing are derived. When the carrier-to-noise ratio is low, the symbol period and synchronisation time are needed to improve identification accuracy. A method for estimating them from the wavelet transform coefficients is included. The performance of the identifier is investigated through simulations
Keywords :
digital communication; digital signals; frequency shift keying; modulation; parameter estimation; phase shift keying; statistical analysis; synchronisation; wavelet transforms; FSK; M-ary FSK; M-ary PSK; PSK; carrier-to-noise ratio; digital communication signal; digital signals; electronic surveillance; hypothesis testing; identification accuracy; incoming signal; modulation identification; statistics; symbol period; synchronisation time; transient characteristics; wavelet transform;
fLanguage :
English
Journal_Title :
Radar, Sonar and Navigation, IEE Proceedings -
Publisher :
iet
ISSN :
1350-2395
Type :
jour
DOI :
10.1049/ip-rsn:20000492
Filename :
861782
Link To Document :
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