Classification of multiple M-ary frequency-shift keying signals over a Rayleigh fading channel

Author

El-Mahdy, Ahmed E. ; Namazi, Nader M.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Catholic Univ. of America, Washington, DC, USA

Volume

50

Issue

6

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

967

Lastpage

974

Abstract

We develop and analyze classifiers for multiple M-ary frequency-shift keying (MFSK) signals traveled over a static frequency nonselective Rayleigh fading channel. The classifier is based on approximating the likelihood function (LF) of the frequency modulated digital signals and is derived for both synchronous and asynchronous waveforms. Two cases are considered; the first one is concerned with the signals that have identical modulation type [for example, binary FSK (BFSK) or quaternary FSK (QFSK)]. The second case deals with the signals with different modulation type. We use complex envelope representation of the signals and noise to derive the LF. Simulation experiments are illustrated to validate the theoretical developments

Keywords

Rayleigh channels; approximation theory; digital signals; frequency shift keying; noise; signal representation; BFSK; M-ary FSK signals; M-ary frequency-shift keying signals; MFSK; QFSK; asynchronous waveforms; binary FSK; complex envelope representation; demodulation; frequency modulated digital signals; likelihood function approximation; modulation; noise; quaternary FSK; signal classification; simulation experiments; static frequency nonselective Rayleigh fading channel; synchronous waveforms; Demodulation; Fading; Feature extraction; Frequency shift keying; Low-frequency noise; Pattern classification; Pattern recognition; Signal analysis; Signal processing; Testing;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2002.1010616

Filename

1010616