DocumentCode :
1558057
Title :
Performance of Full CSI Selection Combining for Cooperative Diversity Systems
Author :
Selvaraj, M.D. ; Mallik, Ranjan K.
Author_Institution :
C.R. Rao Adv. Inst. of Math., Stat. & Comput. Sci., Univ. of Hyderabad Campus, Hyderabad, India
Volume :
60
Issue :
9
fYear :
2012
fDate :
9/1/2012 12:00:00 AM
Firstpage :
2482
Lastpage :
2488
Abstract :
Cooperative diversity achieves enhanced data rates and throughput using distributed spatial diversity techniques. We consider a cooperative diversity system comprising of a source, a relay, and a destination, with decode and forward (DF) protocol at the relay. The drawback of conventional instantaneous signal-to-noise ratio (SNR) based selection combining is that it fails to use the instantaneous SNR of the source-relay channel at the destination while selecting the best channel from source-destination and relay-destination channels. Full channel state information (CSI) selection combining, which effectively utilizes the instantaneous SNR of the source-relay channel at the destination, is used to overcome this drawback. The exact end-to-end symbol error probability (SEP) of full CSI selection combining for this DF system, with M-ary phase-shift keying in a flat Rayleigh fading environment, is derived. The analysis is validated through simulations. The diversity gain analysis is also studied for this scheme. Further, we compare the full CSI selection combining scheme with some other existing schemes. Numerical results show that full CSI selection combining has performance similar to that of instantaneous SEP based selection combining, but offers SNR gain over instantaneous SNR based selection combining, max-min selection, and selection cooperation.
Keywords :
cooperative communication; decode and forward communication; diversity reception; error statistics; minimax techniques; phase shift keying; protocols; DF protocol; DF system; M-ary phase-shift keying; cooperative diversity systems; decode and forward protocol; distributed spatial diversity technique; diversity gain analysis; end-to-end SEP; end-to-end symbol error probability; flat Rayleigh fading environment; full channel state information selection combining scheme; full-CSI selection combining scheme; instantaneous SEP-based selection combining; instantaneous SNR-based selection combining; max-min selection; relay-destination channel; selection cooperation; signal-to-noise ratio; source-destination channel; source-relay channel; Diversity methods; Diversity reception; Phase shift keying; Rayleigh channels; Relays; Signal to noise ratio; Cooperative diversity; M-ary phase-shift keying (MPSK); Rayleigh fading; decode and forward (DF) relaying; full CSI selection combining; symbol error probability (SEP);
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2012.071212.110101
Filename :
6242357
Link To Document :
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