DocumentCode :
1475675
Title :
Multichannel maximum-likelihood sequence estimation (MLSE) equalizer for GSM using a parametric channel model
Author :
Chen, Jiunn-Tsair ; Paulraj, Arogyaswami ; Reddy, Umapathi
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Volume :
47
Issue :
1
fYear :
1999
fDate :
1/1/1999 12:00:00 AM
Firstpage :
53
Lastpage :
63
Abstract :
We propose a novel algorithm for the maximum-likelihood sequence estimation (MLSE) equalizer for the Global System for Mobile Communications (GSM) system. Specifically, we use a parametric model for the channel, along with a modified phase pulse-shaping function of Gaussian minimum shift keying (GMSK) modulation to obtain the modified Viterbi equalizer which we refer to as the parametric channel-Viterbi equalizer (PC-VE). In contrast to the conventional Viterbi equalizer with a finite impulse response (FIR) channel description, the PC-VE avoids the linear approximation error. The PC-VE also has a lower computational complexity if the number of the propagation paths is less than the number of the FIR channel taps multiplied by the number of antennas. The proposed algorithm is applicable to both single and multiantenna receivers. An analytical expression for the BER as a function of the SNR, path delays, and path DOAs has been derived. Some simulation results that illustrate the performance of the proposed algorithm are presented
Keywords :
Viterbi detection; cellular radio; direction-of-arrival estimation; equalisers; error statistics; maximum likelihood sequence estimation; minimum shift keying; multipath channels; multiuser channels; pulse shaping; radio receivers; transient response; BER; DOA; FIR channel taps; GMSK modulation; GSM; Gaussian minimum shift keying; Global System for Mobile Communications; MLSE equalizer; SNR; algorithm; computational complexity; finite impulse response channel; modified Viterbi equalizer; modified phase pulse-shaping function; multiantenna receiver; multichannel maximum-likelihood sequence estimation; multipath channel; parametric channel model; parametric channel-Viterbi equalizer; path delays; performance; propagation paths; simulation results; single antenna receiver; Computational complexity; Equalizers; Finite impulse response filter; GSM; Linear approximation; Maximum likelihood estimation; Parametric statistics; Phase modulation; Pulse modulation; Viterbi algorithm;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/26.747813
Filename :
747813
Link To Document :
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