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This paper investigates the energy efficient resource allocation strategy for OFDM-based cognitive radio (CR) networks with imperfect spectrum sensing. The interference model taking the sensing errors into account is formulated at first. And the objective is to maximize the energy efficiency of the multiuser CR system subject to the total transmission power budget and each primary user's (PU) interference...
With the continuous growth of the wireless communication business, energy issues and environmental problems are becoming increasingly grim. Therefore, this paper investigates the energy efficient transmission scheme with cooperative sensing in cognitive radio networks, in which AND fusion rule is introduced to determine the presence of the primary user. It is proved that the energy efficiency is a...
The resource allocation scheme for the multiple description coding multicast (MDCM) in orthogonal frequency division multiplexing (OFDM-based) cognitive radio network (CRN) is studied in this paper, aiming at maximizing the total throughput of cognitive radio (CR) users, with constraints on sum transmit power, the maximal receiving rate of each CR user and the maximal total interference introduced...
A credibility test method based on approximate entropy (ApEn) is proposed to evaluate the blind processing results of BPSK signals in Cognitive Radio (CR). In the absence of a priori knowledge for the signals, the reference signals were constructed depending on the modulation recognition results by the specific modulation recognition scheme at first. Then the modulus of the cumulative sum (CUSUM)...
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