Title :
Adaptive channel equalization for high-speed train
Author :
Liu, Weilin ; Romanens, Hervê
Author_Institution :
ASCOM Tech. Ltd., Magenwil, Switzerland
Abstract :
The paper deals with the performance of the GSM physical layer for the railway application with a possible train speed up to 500 km/h. An adaptive Viterbi equalizer with two channel tracking approaches has been considered. The first is the conventional least mean square and the second is a simplified Kalman predictor. Simulation results demonstrate the necessity of channel adaption for a high speed train. They also show that for almost comparable complexity, simplified Kalman predictor considerably outperforms the LMS due to the utilization of the channel second-order statistics
Keywords :
Kalman filters; adaptive equalisers; cellular radio; computational complexity; digital radio; least mean squares methods; maximum likelihood estimation; minimum shift keying; prediction theory; railways; telecommunication channels; time division multiple access; 900 MHz; GSM physical layer; adaptive Viterbi equalizer; adaptive channel equalization; channel adaption; channel tracking approach; complexity; high-speed train; least mean square; performance; second-order statistics; simplified Kalman predictor; Adaptive equalizers; GSM; Kalman filters; Least squares approximation; Maximum likelihood estimation; Pulse shaping methods; Rail transportation; Resonance light scattering; Statistics; Viterbi algorithm;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345132
