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Unlike conventional radios, cognitive radios are to use channel occupancy information measured at the PHY layer and conveyed to the MAC layer to select suitable frequency bands to communicate. Many existing PHY/MAC decision-making strategies, however, assume that the cognitive radio belongs to a particular radio network and its communication capabilities are limited to the protocols supported by that...
Cognitive radio techniques allow secondary users (SU's) to opportunistically access underutilized primary channels that are licensed to primary users. We consider a group of SU's with limited spectrum sensing capabilities working cooperatively to find primary channel spectrum holes. The objective is to design the optimal sensing and access policies that maximize the total secondary throughput on primary...
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