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Relay selection is a crucial method that can improve the spectrum efficiency and converge performance of relay assisted (RA) network. However, most of the existing research about relay selection did not consider the effect of imperfect channel state information (CSI) and the CSI obtaining cost. Few of the study about the relay selection with imperfect CSI focused mainly on the decode-and-forward (DF)...
Opportunistic spectrum sharing (OSS) and cooperative spectrum sharing (CSS) are typical dynamic spectrum accessing (DSA) technologies to effectively improve spectrum efficiency (SE) and energy efficiency (EE). However, OSS provides no benefit to the primary user, whereas CSS, although simultaneously improving SE of the primary user and the secondary user, needs a proper cooperative mechanism with...
Multi-node decode and forward protocol(MNDFP) can be used to improve transmission performance and expand coverage. However, in traditional MNDFP, the number of cooperative nodes(relays) is fixed, regardless of the Channel Quality(CQ). In this paper, we proposed a selective strategy for MNDFP, which can adjust the amount of cooperative nodes adaptively based on the CQ. We give the closed-form expression...
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