DocumentCode :
650948
Title :
BER analysis and optimization for differential cooperative networks with relay selection
Author :
Kun Zhao ; Bangning Zhang ; Kegang Pan ; Aijun Liu ; Daoxing Guo
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
fYear :
2013
fDate :
24-26 Oct. 2013
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, we investigate a cooperative communication system which consists of a source, a destination and NR relays. The differential modulation and relay selection (DM-RS) are combined in the system, where the best relay is selected to assist the source node with detect-and-forward (DetF) protocol. We consider general fading scenarios where the channel variances of different links are not equal, the average bit error rate (ABER) performance and power allocation strategy are investigated. Firstly, a theoretical ABER expression of the scheme with differential M-ary phase shift keying (DMPSK) modulation is derived. Then, to gain more insightful understanding, we look into the high signal-to-noise ratio (SNR) regime and provide a simple and informative asymptotic ABER expression, which reveals that the scheme can achieve a full diversity order. Furthermore, based on the simple asymptotic ABER expression, the optimum power allocation strategy is determined to improve the system ABER performance. Simulation and numerical results show that the optimum power allocation strategy yields significant performance improvement over the equal power allocation strategy.
Keywords :
cooperative communication; differential phase shift keying; diversity reception; error statistics; protocols; BER analysis; average bit error rate; cooperative communication system; detect-and-forward protocol; differential M-ary phase shift keying modulation; differential cooperative networks; differential modulation; optimum power allocation strategy; relay selection; signal-to-noise ratio; Cooperative communications; average bit error rate; differential modulation; optimum power allocation; relay selection;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications & Signal Processing (WCSP), 2013 International Conference on
Conference_Location :
Hangzhou
Type :
conf
DOI :
10.1109/WCSP.2013.6677200
Filename :
6677200
Link To Document :
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