Demodulation of cochannel FSK signals using joint maximum likelihood sequence estimation

Author

Ready, Michael J. ; Chari, Sujai

Author_Institution

Appl. Signal Technol. Inc., Sunnyvale, CA, USA

fYear

1993

fDate

1-3 Nov 1993

Firstpage

1412

Abstract

This paper describes a technique for demodulating cochannel Manchester-encoded, frequency-shift-keyed (MEFSK) signals even when the two signals have equal power. Both data sequences are recovered. The technique is based on joint maximum likelihood sequence estimation (JMLSE). The Viterbi algorithm is used to minimize the computational requirements. Adaptive loops track the transmitter carrier and filtering characteristics. The demodulator performance is evaluated as a function of baudrate offset, carrier power separation and additive noise

Keywords

demodulation; encoding; estimation theory; frequency shift keying; maximum likelihood estimation; JMLSE; MEFSK signals; Manchester-encoded FSK signals; Viterbi algorithm; adaptive loops; additive noise; baudrate offset; carrier power separation; cochannel FSK signals; data sequences; demodulation; demodulator performance; equal power signals; filtering characteristics; joint maximum likelihood sequence estimation; transmitter carrier tracking; Adaptive filters; Additive noise; Bandwidth; Demodulation; Filtering; Frequency shift keying; Maximum likelihood estimation; Signal processing; Tracking loops; Transmitters; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-4120-7

Type

conf

DOI

10.1109/ACSSC.1993.342308

Filename

342308