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Wireless Communications and Mobile Computing - Volume 2017 2017, Article ID 4063792, 7 pages - https:-doi.org-10.1155-2017-4063792

Research Article

Faculty of Information Engineering and Technology, The German University in Cairo, Cairo, Egypt

The German University in Cairo, Cairo, Egypt

Correspondence should be addressed to Wassim Alexan

Received 23 July 2016; Accepted 7 September 2016; Published 10 January 2017

Academic Editor: Pierre-Martin Tardif

Copyright © 2017 Ahmed El-Mahdy and Wassim Alexan. 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.


A comparative study on the theoretical bit error rate BER is presented for hybrid relaying schemes that toggle between adaptive decode-and-forward ADF and amplify-and-forward AF protocols, for a typical three-node wireless network. Toggling between the two forwarding protocols is based on the log-likelihood ratio LLR or the signal-to-noise ratio SNR of the received signal at the relay node. Closed-form expressions for the probability of error are presented, as well as the expressions of the proposed schemes’ gains over classical ADF and AF protocols. Comparisons are carried out among the two schemes and other hybrid schemes found in the literature. Moreover, the impact of relay location on the probability of error is investigated.

Autor: Ahmed El-Mahdy and Wassim Alexan

Fuente: https://www.hindawi.com/


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