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We propose a cooperative spectrum sharing strategy in which the secondary system can access to the licensed spectrum of the primary system if it can help the primary system achieve the target rate. Specifically, the secondary system acts as a decode-and-forward relay for the primary system by splitting a fraction of its transmission bandwidth to help forward primary signal. It uses the remaining bandwidth...
In this paper, we propose an opportunistic spectrum sharing protocol where the secondary system can access to the licensed spectrum of the primary system based on full-duplex (FD) cooperative OFDM relaying. The secondary transmitter ST_{b} which provides the best primary performance is selected to forward the primary signal. Specifically, in the first phase, ST_{b} receives primary signal on some...
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