digital communications;
fading channels;
equalizers;
time-varying channels;
D O I:
10.1109/26.664292
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
A novel adaptive nonlinear equalizer for fast time-varying multipath channels that combines the channel-estimation and data-detection tasks is presented. The a posteriori probabilities (APP's) of the states of the intersymbol interference (ISI) channel are recursively computed from the received data by a symbol-by-symbol (SbS) detector [7] and are then employed by a Kalman-type nonlinear channel estimator. Robust channel tracking and good data-detection performance are obtained, with a reasonable receiver complexity.