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AuthorZhang X.
AuthorGhrayeb A.
AuthorHasna , Mazen
Available date2022-04-26T11:06:58Z
Publication Date2010
Publication NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
AbstractWe consider in this paper relay assignment for cooperative systems with multiple two-way relay channels. The nodes corresponding to one two-way relay channel (henceforth referred to as pair) communicate with each other through a relay. The relays use network coding to simultaneously transmit the signals corresponding to the pairs they are assigned to. We propose two relay assignment schemes. One scheme considers all possible relay assignment permutations and selects the one yields the best performance, and the other one considers only a subset of these permutations and selects the best one. The advantage of the latter is that it results in a significant reduction in computational complexity, in addition to making the analysis more tractable.We consider the cases when a relay is assigned to a single pair and the case when a relay is assigned (simultaneously) to multiple pairs. To achieve the latter, we use higher order modulation schemes at the relay nodes. We analyze the performance of these schemes over symmetric and asymmetric independent Rayleigh fading channels, and derive closed-form expressions for the end-to-end bit error rate performance. We present several examples to verify the theoretical results.
SubjectAsymmetric channel
Bit error rate performance
Closed-form expression
Cooperative systems
Higher order modulation
Multiple pairs
Network coding
PSK modulation
Relay node
Theoretical result
Two-way relay
Bit error rate
Computational complexity
Fading channels
Information theory
Optical communication
Radio communication
Rayleigh fading
TitleRelay assignment in network-coded cooperative systems with M-PSK modulation over asymmetric channels
TypeConference Paper

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