NDLI: Relay assignment schemes for multiple source-destination cooperative networks

Content Provider	IEEE Xplore Digital Library
Author	Xuehua Zhang Ghrayeb, A. Hasna, M.
Copyright Year	2010
Description	Author affiliation: EE Department, Qatar University, Doha, Qatar (Hasna, M.) \|\| ECE Department, Concordia University, Montreal, Canada (Xuehua Zhang; Ghrayeb, A.)
Abstract	In this paper, we consider cooperative networks comprising multiple simultaneous transmitting source-destination pairs. Specifically, we propose two relay assignment schemes whereby one relay is assigned to one pair at any given time. It is assumed that the number of relays equals or exceeds the number of pairs. This assumption is practical because in future wireless networks, any node in the network can serve as a relay. Both assignment schemes are based on the quality of the subchannels, implying that estimates of the subchannels should be available before the relays are assigned to the pairs. The first assignment scheme is optimal since it considers all possible relay assignment permutations. The second one is suboptimal since it considers only a subset of the possible permutations. The advantages of the latter is that it makes the performance analysis more tractable and reduces the complexity of the assignment process. We derive closed-form expressions for the end-to-end bit error rate performance and show that the full diversity is maintained in both schemes, which equals the number of relays (assuming no direct path between the source and destination nodes). We give several numerical examples that validate the theoretical results.
Starting Page	147
Ending Page	152
File Size	319553
Page Count	6
File Format	PDF
ISBN	9781424452460
e-ISBN	9781424452477
DOI	10.1109/ICTEL.2010.5478645
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-04
Publisher Place	Qatar
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Error probability Wireless networks Bit error rate Quality of service Closed-form solution MIMO Decoding Electronic mail Performance analysis Relays
Content Type	Text
Resource Type	Article

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