Title :
Adaptive PSP-MLSE receiver for GSM/EDGE system in fast multipath fading channels
Author :
Li, Zhenhong ; Mämmelä, Aarne
Author_Institution :
VTT Electron., Oulu, Finland
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;
Conference_Titel :
Personal Wireless Communications, 2000 IEEE International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
0-7803-5893-7
DOI :
10.1109/ICPWC.2000.905799
