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As an emerging patient-centric model of health information exchange, cloud-based personal health record (PHR) system holds great promise for empowering patients and ensuring more effective delivery of health care. In this paper, we propose a novel patient-centric cloud-based secure PHR system, which allows patients to securely store their PHR data on the semi-trusted cloud service providers, and selectively...
In this paper, we propose an approach for detecting primary user emulation attacks in cognitive radio networks. Cognitive radios (CRs) have been proposed as a promising solution for improving spectrum utilization via opportunistic spectrum sharing. In a CR network environment, primary (licensed) users have priority over secondary (unlicensed) users when accessing the wireless channel. Thus, if a malicious...
The optimality of the maximum a posteriori probability(MAP) bit detection for differentially encoded M-PSK signals over static non-ISI channels is emphasized, in which the demodulator computes loglikelihood ratio (LLR) of individual coded bits directly, but not via transforming those successive detected symbolspsila LLR into bitspsila LLR as the conventional methods. As a representative, the designs...
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