Design of Simple and Efficient Multi-branch Selection Combining System
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To overcome the performance limit of multi-branch switch and stay combining (SSC) systems, the branches are divided into a pair of sub-SSC systems that are connected to selection combining. To evaluate the proposed system, the general mathematical expressions of average output signal-to-noise ratio (SNR) for the independent Nakagami-m fading branches are provided. There are deduced for the case in which one branch has higher or lower average SNR than the other branches. We also perform a numerical analysis, and demonstrate that this simple structure reconfiguration considerably increases the performance of SSC systems in several environments.
KeywordsDiversity methods Nakagami-m fading model Switch and stay combining Selection combining Average SNR
The author would like to thank anonymous reviewers for their thoughtful and valuable comments, which increased the quality of this paper.
- 8.Prasad, R. (1998). Universal wireless personal communication. Norwood, MA: Artech House.Google Scholar
- 10.Simon, M. K., & Alouini, M.-S. (2002). Digital communication over fading channels: A unified approach to performance analysis. Hoboken: Wiley.Google Scholar
- 11.Win, M. Z., & Winters, J. H. (1999). On maximal ratio combining in correlated Nakagami channels with unequal fading parameters and SNRs among branches: An analytical framework. Wireless Communications and Networking Conference, 3, 1058–1064.Google Scholar