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  • Research Article
  • Open Access

Bit Error Rate Performance Analysis of a Threshold-Based Generalized Selection Combining Scheme in Nakagami Fading Channels

EURASIP Journal on Wireless Communications and Networking20052005:219758

  • Received: 2 September 2004
  • Published:


The severity of fading on mobile communication channels calls for the combining of multiple diversity sources to achieve acceptable error rate performance. Traditional approaches perform the combining of the different diversity sources using either the conventional selective diversity combining (CSC), equal-gain combining (EGC), or maximal-ratio combining (MRC) schemes. CSC and MRC are the two extremes of compromise between performance quality and complexity. Some researches have proposed a generalized selection combining scheme (GSC) that combines the best branches out of the available diversity resources ( ). In this paper, we analyze a generalized selection combining scheme based on a threshold criterion rather than a fixed-size subset of the best channels. In this scheme, only those diversity branches whose energy levels are above a specified threshold are combined. Closed-form analytical solutions for the BER performances of this scheme over Nakagami fading channels are derived. We also discuss the merits of this scheme over GSC.


  • diversity systems
  • generalized selection combining
  • threshold-based GSC
  • mobile communications
  • Nakagami-m fading

Authors’ Affiliations

Electrical and Computer Engineering Department, Faculty of Applied Science, Queen's University, Kingston, ON, K7L 3N6, Canada
Electrical Engineering Department, College of Engineering Sciences, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia


© Sulyman and Kousa 2005

This article is published under license to BioMed Central Ltd. 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.