Wireless Personal Communications

, Volume 104, Issue 3, pp 1065–1074 | Cite as

Design of Simple and Efficient Multi-branch Selection Combining System

  • Semyoung OhEmail author
  • Jongha Yoon
  • Taehwan Cho


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.


Diversity 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.


  1. 1.
    Stüber, G. L. (2017). Principles of mobile communication (4th ed.). Norwell, MA: Springer.CrossRefGoogle Scholar
  2. 2.
    Williams, J. M., Khanna, R., Ruiz-Rpsero, J. P., Pisharody, G., Qian, Y., Carlson, C. R., et al. (2017). Weaving the wireless web: Toward a low-Power, dense wireless sensor network for the industrial IoT. IEEE Microwave Magazine, 18(7), 40–63.CrossRefGoogle Scholar
  3. 3.
    Mosenia, A., Sur-Kolay, S., Raghunathan, A., & Jha, N. (2017). Wearable medical sensor-based system design: A survey. IEEE Transactions on Multi-scale Computing Systems, 3(2), 124–138.CrossRefzbMATHGoogle Scholar
  4. 4.
    Blanco, M., & Zdunek, K. (1979). Performance and optimization of switched diversity systems for the detection of signals with Rayleigh fading. IEEE Transactions on Communications, 27(12), 1887–1895.CrossRefzbMATHGoogle Scholar
  5. 5.
    Abu-Dayya, A. A., & Beaulieu, N. C. (1994). Switched diversity on microcellular Ricean channels. IEEE Transactions on Vehicular Technology, 43(4), 970–976.CrossRefGoogle Scholar
  6. 6.
    Abu-Dayya, A. A., & Beaulieu, N. C. (1994). Analysis of switched diversity systems on generalized-fading channels. IEEE Transactions on Communications, 42(11), 2959–2966.CrossRefGoogle Scholar
  7. 7.
    Yang, H.-C., & Alouini, M.-S. (2003). Performance analysis of multi-branch switched diversity systems. IEEE Transactions on Communications, 51(5), 782–794.CrossRefGoogle Scholar
  8. 8.
    Prasad, R. (1998). Universal wireless personal communication. Norwood, MA: Artech House.Google Scholar
  9. 9.
    Ko, Y.-C., Alouini, M.-S., & Simon, M. K. (2000). Analysis and optimization of switched diversity systems. IEEE Transactions on Vehicular Technology, 49(5), 1813–1831.CrossRefGoogle Scholar
  10. 10.
    Simon, M. K., & Alouini, M.-S. (2002). Digital communication over fading channels: A unified approach to performance analysis. Hoboken: Wiley.Google Scholar
  11. 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
  12. 12.
    Alouini, M.-S., & Simon, M. K. (2000). An MGF-based performance analysis of generalized selection combining over Rayleigh fading channels. IEEE Transactions on Communications, 48(3), 401–415.CrossRefGoogle Scholar
  13. 13.
    Gradshteyn, I. S., & Ryzhik, I. M. (2007). Table of integrals, series, and products (7th ed.). Cambridge: Academic Press.zbMATHGoogle Scholar
  14. 14.
    Abramowitz, M., & Stegun, I. A. (1965). Handbook of mathematical functions: With formulas, graphs, and mathematical tables. New York: Dover.zbMATHGoogle Scholar
  15. 15.
    Chen, Y., & Tellambura, C. (2004). Distribution functions of selection combiner output in equally correlated Rayleigh, Rician, and Nakagami-m fading channels. IEEE Transactions on Communications, 52(11), 1948–1956.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electronic and Communication EngineeringRepublic of Korea Air Force AcademyCheongjuSouth Korea
  2. 2.Air Force Research WingRepublic of Korea Air Force HeadquartersGyeryongSouth Korea

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