DocumentCode :
1445894
Title :
Single-channel blind equalization for GSM cellular systems
Author :
Ding, Zhi ; Li, Ge
Author_Institution :
Dept. of Electr. Eng., Auburn Univ., AL, USA
Volume :
16
Issue :
8
fYear :
1998
fDate :
10/1/1998 12:00:00 AM
Firstpage :
1493
Lastpage :
1505
Abstract :
This paper focuses on the study of blind equalization global system for mobile communications (GSM) systems using a single antenna. In order to utilize the well-known linear system model in conventional studies of blind equalization, an equivalent baseband quadrature amplitude modulation (QAM) approximation is used for the nonlinear GMSK signal in GSM systems. Since the GMSK signal in GSM has very little excess bandwidth to warrant oversampling, a derotation scheme is developed to create two subchannels for each received GMSK signal sampled at the baud rate. Linear approximation of the GMSK signal makes the traditional QAM blind equalization system model applicable for GSM. Derotation induces channel diversity without an additional antenna and reduces the number of necessary radio frequency (RF) receivers (sensors) without increasing hardware or computational costs. Several second-order statistical and higher order statistical methods of blind equalization are adopted for GSM signals
Keywords :
approximation theory; blind equalisers; cellular radio; diversity reception; minimum shift keying; quadrature amplitude modulation; signal sampling; statistical analysis; GSM cellular systems; RF receivers; antenna; bandwidth; baseband QAM approximation; baud rate sampled signal; channel diversity; computational costs; derotation scheme; global system for mobile communications; hardware costs; higher order statistical methods; linear approximation; linear system model; nonlinear GMSK signal; quadrature amplitude modulation; second-order statistical methods; sensors; single-channel blind equalization; Bandwidth; Baseband; Blind equalizers; GSM; Linear approximation; Linear systems; Mobile antennas; Quadrature amplitude modulation; Radio frequency; Receiving antennas;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/49.730456
Filename :
730456
Link To Document :
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