Table of Contents
ISRN Signal Processing
Volume 2013, Article ID 894542, 6 pages
Research Article

Adaptive Selection Combining Receiver over Time Varying Frequency Selective Fading Channel in Class-A Noise

German University in Cairo, New Cairo City 11835, Egypt

Received 27 February 2013; Accepted 21 April 2013

Academic Editors: S. Kalitzin and W. Liu

Copyright © 2013 Ahmed El-Sayed El-Mahdy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An adaptive selection combining (SC) scheme is proposed for time varying mobile communication channel in Class-A impulsive noise. The receiver adaptively selects a diversity branch out of the available branches and discards the others. This is performed by computing the maximum likelihood (ML) metric of each diversity branch and selects the branch with the maximum metric. The proposed adaptive SC scheme dynamically adjusts the threshold value according to the time variations of the channel. Equalization and data detection are performed after combining using maximum likelihood sequence estimation implemented by Viterbi algorithm (MLSE-VA). The minimum survivor technique is employed to reduce the complexity of the receiver.