A simple coherent GMSK demodulator

Author

Lakkis, Ismail ; Su, Jing ; Kato, Shuzo

Author_Institution

Omniwireless Inc., San Diego, CA, USA

Volume

1

fYear

2001

fDate

37135

Abstract

We show that a symbol-by-symbol detector is the optimal MLSE demodulator for Gaussian minimum-shift keying (GMSK) (BT=0.3) on both AWGN and a class of weakly dispersive multipath fading channels. Furthermore, it is shown that, for the remaining weakly dispersive channels, a 2 state Viterbi equalizer is optimum. As an illustration of the importance of this result, a receiver is proposed which can reduce the power consumption of GSM handsets using conditional equalization, as more than 70% of the time the channel is considered to be weakly dispersive

Keywords

AWGN channels; cellular radio; demodulation; dispersive channels; equalisers; fading channels; maximum likelihood sequence estimation; minimum shift keying; multipath channels; power consumption; radio receivers; AWGN channels; GSM handsets; Gaussian minimum-shift keying; MLSE demodulator; Viterbi equalizer; coherent GMSK demodulator; conditional equalization; dispersive channels; fading channels; multipath channels; power consumption; receiver; symbol-by-symbol detector; AWGN; Demodulation; Detectors; Dispersion; Energy consumption; Equalizers; Fading; GSM; Maximum likelihood estimation; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2001 12th IEEE International Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-7244-1

Type

conf

DOI

10.1109/PIMRC.2001.965402

Filename

965402