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Cooperative spectrum sensing is employed to detect the primary user more accurately in cognitive radio systems. Since the non-ideal reporting channels between the base station and the cognitive users degrade the sensing performance, STBC based clustering scheme is adopted to deal with this problem. However, inter-user channels between cognitive users may also experience fading and decrease the sensing...
With coexistence of primary and cognitive radio (CR) networks, the benefits of non-selfish symbiotic cognitive relaying (NSSCR) were illustrated in previous work by considering single cognitive radio user (CRU) cooperation. However, with cooperation from multiple CRUs instead of a single CRU, additional degree of diversity gain as well as power gain can be achieved. Thus, in this paper a multiuser...
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