Spectral Efficiency Evaluation for Selection Combining Diversity Schemes under Worst Case of Fading Scenario.

Mohammad Irfanul Hasan; Sanjay Kumar

Author(s)

Mohammad Irfanul Hasan Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, India; Department of Electronics and Communication Engineering, Graphic Era University, Dehradun, India

Sanjay Kumar Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, India

Abstract

The results of spectral efficiencies for optimum rate adaptation with constant transmit power (ORA) and channel inversion with fixed rate (CIFR) schemes over uncorrelated diversity branch with Selection Combining (SC) available so far in literature are not applicable for Nakagami-0.5 fading channels. This paper derived closed-form expressions for the spectral efficiency of dual-branch SC over uncorrelated Nakagami-0.5 fading channels. This spectral efficiency is evaluated under ORA and CIFR schemes. Since, the spectral efficiency expression under ORA scheme contains an infinite series, hence bounds on the errors resulting from truncating the infinite series have been derived The corresponding expressions for Nakagami-0.5 fading are called expressions under worst fading condition with severe fading. Finally, numerical results are presented, which are then compared to the spectral efficiency results which have been previously published for ORA and CIFR schemes. It has been observed that by employing SC, spectral efficiency improves under ORA, but does not improve under CIFR.

Publication Details

Page(s) 123-130

DOI DOI not available

Published Journal: International Journal of Communication Networks and Information Security, Volume: 7, Issue: 3, Year: 2015

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