Relay-aided Interference Mitigation: the study of two users interference channel with two relays
Date Issued
2015
Date
2015
Author(s)
Luo, Jhong-Wei
Abstract
Cooperation among transmitters is one of the promising solutions to man- age interference and improve the system performance. In this thesis, a two- pairs interference channel that two relays are deployed and cooperate with two sources is studied. Relay could decode the message and forms a distributed MIMO system with sources to mitigate the interference by beamforming. On the contrary, relay would quantize the received sequence and forward the side information to improve both SNR and INR at the destination. Most impor- tantly, both relays could also cooperate each other so that the interference would be mitigate efficiently. We derive the achievable rate region and con- tribute a framework to analyze the performance of different strategies of relays according to different situation. On the other hand, relay does not always turn on and service particular users in the practical world. The transmission will fail if source believes that relays always cooperatively transmit. Relay, however, does not turn on. Thus, we also discuss this unreliable relays interference channel that sources do not know any information about the behavior of relays. The degraded message set and multi-level coding scheme are utilized to maintain the basic data rate when relay is off and obtain higher rate when relay is on and the achievable rate region is derived.
Subjects
Relay interference channel
Multiple relays channel
Unreliable relay channel
Beamforming
Interference management
Type
thesis
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