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In this paper, cooperative multicast with the help of short-range data sharing is studied in the cognitive radio networks (CRNs). The original multicast data is split into many segments, and the transmission of each segment is divided into two stages. In the first stage, cognitive base station transmits each segment to the corresponding cooperative user, and in the second stage, the cooperative user...
An adaptive subcarriers nulling power allocation algorithm for OFDM-based cognitive radio (CR) network was proposed to maximize the total capacity of CR users, with constraints on sum transmit power and the interference introduced to individual primary user on its allocated frequency band. The proposed algorithm considering both CR users' channel states and the interference to primary users (PUs)...
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