Reduction of adjacent channel interference effects in GMSK communication links

Author

Mendlovitz, Mark A.

Author_Institution

Commun. & Software Solutions Div., Titan Syst. Corp., Los Angeles, CA, USA

Volume

1

fYear

2002

fDate

7-10 Oct. 2002

Firstpage

685

Abstract

The problem of adjacent channel interference (ACI) in GMSK communication links is addressed, and a new high-performance demodulator is proposed for reducing the effects of ACI. The key modification in our (hard or soft-decision) trellis demodulator is the addition of persurvivor LMS adaptive filtering to "whiten" additive correlated noise, such as ACI. Simulations of our algorithm in a seven-channel, binary, coherent GMSK satellite communication band demonstrate substantially better performance than that obtained with an equalized one-filter GMSK demodulator.

Keywords

AWGN channels; adaptive filters; adjacent channel interference; demodulation; equalisers; filtering theory; interference suppression; least mean squares methods; minimum shift keying; satellite links; ACI; AWGN channels; GMSK communication links; additive correlated noise whitening; adjacent channel interference reduction; binary satellite communication band; coherent GMSK satellite communication; demodulation algorithms; equalized one-filter GMSK demodulator; high-performance demodulator; persurvivor LMS adaptive filtering; simulations; trellis demodulator; AWGN; Adaptive filters; Additive white noise; Bandwidth; Demodulation; Gaussian noise; Interchannel interference; Intersymbol interference; Shape; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

MILCOM 2002. Proceedings

Print_ISBN

0-7803-7625-0

Type

conf

DOI

10.1109/MILCOM.2002.1180528

Filename

1180528