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General Information

Prof. Pascal Lorenz
University of Haute Alsace, France
It is my honor to be the editor-in-chief of IJFCC. The journal publishes good papers in the field of future computer and communication. Hopefully, IJFCC will become a recognized journal among the readers in the filed of future computer and communication.

IJFCC 2015 Vol.4(4): 226-230 ISSN: 2010-3751
DOI: 10.7763/IJFCC.2015.V4.390

Group Switch-and-Stay Combining with Branch Partition for Space Diversity

Yawgeng A. Chau and Mostafa Al-Harbawi
Abstract—Group switch-and-stay combining (GSSC) with branch partitions is proposed for a low-complexity multi-antenna selection in a receiver diversity system. The GSSC can enhance the performance of conventional switch-and-stay combining (SSC), and also has a lower complexity than maximal-ratio combining (MRC) or selection combining (SC). With the GSSC scheme, multiple antenna branches are divided into non-overlapped groups. In each group, the branch with the maximum signal-to-noise ratio (SNR) is used for threshold-based group switch. With particular grouping and threshold choosing, both SC and SSC schemes become different special cases of the GSSC scheme. For performance illustration, BPSK signaling on independent and identically distributed (i.i.d.) flat Rayleigh fading channels is considered, and the corresponding bit error probability (BEP) and outage probability are derived and manipulated into closed-forms. To minimize the BEP, locally optimal switch thresholds (STs) are defined and derived. For grouping with the same number of branches and an identical switch threshold (ST), the locally optimal ST becomes globally optimal. Numerical results are presented for the performance illustration and comparison.

Index Terms—Group switch-and-stay combining, space diversity, switch-and-stay combining, selection combining, optimal switch threshold.

The authors are with the Department of Communications Engineering Yuan-Ze University Chung-Li, Taiwan (e-mail: eeyaw.chau@gmail.com).


Cite: Yawgeng A. Chau and Mostafa Al-Harbawi, "Group Switch-and-Stay Combining with Branch Partition for Space Diversity," International Journal of Future Computer and Communication vol. 4, no. 4, pp. 226-230, 2015.

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