Adaptive PSP-MLSE receiver for GSM/EDGE system in fast multipath fading channels

Author

Li, Zhenhong ; Mämmelä, Aarne

Author_Institution

VTT Electron., Oulu, Finland

fYear

2000

fDate

2000

Firstpage

184

Lastpage

188

Abstract

An adaptive MLSE receiver based on per-survivor processing (PSP-MLSE) for the GSM/EDGE system with 8PSK modulation is presented. The initial channel impulse response is estimated by the LS algorithm with a training midamble sequence. The PSP-MLSE is in conjunction with the LMS algorithm to track the fast time-varying channel. Based on the EDGE burst structure, the second part of the data stream is tracked forwards while the first part is tracked backwards in order to improve the performance in rapidly changing channels. Computer simulations indicate that the PSP-MLSE is clearly superior to the conventional adaptive MLSE (CA-MLSE), especially, at high velocities. Moreover, the loss due to the estimation error is also presented by measuring the ideal system performance. Furthermore, the termination effect of the Viterbi algorithm is also discussed

Keywords

cellular radio; fading channels; least mean squares methods; maximum likelihood sequence estimation; multipath channels; phase shift keying; radio receivers; time-varying channels; transient response; 8PSK modulation; GSM/EDGE system; LMS algorithm; Viterbi algorithm; adaptive PSP-MLSE receiver; burst structure; channel impulse response; estimation error; fast multipath fading channels; per-survivor processing; termination effect; time-varying channel; training midamble sequence; AWGN; Computer simulation; Delay estimation; Fading; GSM; Land mobile radio; Least squares approximation; Maximum likelihood estimation; Phase shift keying; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Wireless Communications, 2000 IEEE International Conference on

Conference_Location

Hyderabad

Print_ISBN

0-7803-5893-7

Type

conf

DOI

10.1109/ICPWC.2000.905799

Filename

905799