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The Scientific World Journal
Volume 2013, Article ID 785840, 6 pages
http://dx.doi.org/10.1155/2013/785840
Research Article

Amplify-and-Forward Cooperative Diversity for Green UWB-Based WBSNs

1Electronics and Communications Engineering, Arab Academy for Science, Technology & Maritime Transport (AASTMT), Alexandria 1029, Egypt
2Computer Engineering, Arab Academy for Science, Technology & Maritime Transport (AASTMT), Alexandria 1029, Egypt

Received 7 July 2013; Accepted 1 October 2013

Academic Editors: R. J. Ferrari, M. Nappi, N. Nishchal, and P. Siohan

Copyright © 2013 Heba Shaban and Mohamad Abou El-Nasr. 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.

Abstract

This paper proposes a novel green cooperative diversity technique based on suboptimal template-based ultra-wideband (UWB) wireless body sensor networks (WBSNs) using amplify-and-forward (AF) relays. In addition, it analyzes the bit-error-rate (BER) performance of the proposed nodes. The analysis is based on the moment-generating function (MGF) of the total signal-to-noise ratio (SNR) at the destination. It also provides an approximate value for the total SNR. The analysis studies the performance of equally correlated binary pulse position modulation (EC-BPPM) assuming the sinusoidal and square suboptimal template pulses. Numerical results are provided for the performance evaluation of optimal and suboptimal template-based nodes with and without relay cooperation. Results show that one relay node provides ~23 dB performance enhancement at BER, which mitigates the effect of the nondesirable non-line-of-sight (NLOS) links in WBSNs.