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).
[PDF]
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.
