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Title: Causal cognitive radio: An information theoretic perspective
Keywords: Information Theory, Cognitive Radio, Cooperation in Wireless Communication
Issue Date: 14-Apr-2009
Citation: SEYED HOSSEIN SEYEDMEHDI (2009-04-14). Causal cognitive radio: An information theoretic perspective. ScholarBank@NUS Repository.
Abstract: Recently cognitive radio (CR) has been proposed as a new form of cooperative model for wireless communications. One important feature of the CR is that the secondary (cognitive) user is allowed to coexist with the primary (licensed) users. The cognitive user is assumed to be an intelligent user which is capable of perceiving the environment and adapting its way of communication in order to enhance the performance.In this work, a causal (non-anticipating) cognitive radio (CCR) model is proposed in which the primary and secondary users transmit their messages simultaneously during all the transmission time. We refer such a model as interference channel with Causal Unidirectional Cooperation (IC-CUC) or CCR model. An achievable rate region for the IC-CUC is established using a combination of various encoding and decoding methods. Also, the derived achievable rate region in the Gaussian case is demonstrated and compared with the existing results.
Appears in Collections:Master's Theses (Open)

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