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In this paper multi-antenna half-duplex and full-duplex relaying are compared from the perspective of achievable rates. Full-duplexing operation requires additional resources at the relay such as antennas and RF chains for self-interference cancellation. Using a practical model for the residual self-interference, full-duplex achievable rates and degrees of freedom are computed for the cases for which...
Achievable rate for a single-relay channel with finite input practical constellations like QAM and PSK, which operates under the decode and forward protocol, is studied. An achievable rate is computed for full duplex relay (FDR) channel and half duplex relay (HDR) channel. We consider the cases: (i) the source node's and relay node's signals can be correlated for the FDR channel, (ii) repetition coding...
This work presents a new approach to spectrum sensing for cognitive radios with multiple sensors under a change detection framework. Physical layer fusion is used at the fusion center in order to implement a cumulative sum based change detection algorithm. Two channel models, AWGN and quasi static block-fading, are considered for the channel between the sensors and the fusion center. Analytical expressions...
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