An improved adaptive MLSE receiver for fading communication channels

In a mobile cellular systems the fast varying channel characteristics due to fading and to vehicle speed, require a more efficient design of the adaptive receiver. The paper shows the performance improvement obtained by using adaptation algorithm to the maximum likelihood sequence estimation (MLSE) receiver when the tracking of rapidly time-varying distortion is needed. A variety of the most common adaptive algorithms are considered and a more efficient version of the least mean square algorithm (LMS) to recover the Doppler effect is also proposed.