Resource allocation in underlay cognitive radio SATCOM system

Cognitive radio technology plays an important part in satellite communications (SATCOM) since it can improve the spectrum efficiency for the satellite communication system. One type of cognitive radio transmission scheme (underlay) is discussed in this paper. Firstly, we formulate the problem of the cognitive radio satellite communication system for a secondary user. The impact of interference from the primary user is discussed. Secondly, in our framework, the bit error rate performance of different modulation and coding schemes is used in the cognitive radio satellite communication system for the underlay scenario. Thirdly, an efficient power allocation and waveform selection scheme is proposed for the cognitive radio satellite communication system. Finally, we implement extensive simulation results and the simulation results prove the effectiveness of our theoretic formulation. Our analysis brings the insights on cognitive radio satellite communications in terms of different transmission schemes for spectrum sharing between primary users and secondary users.

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