Ehsan Moeen Taghavi

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132 DOI: 10.7763/IJIEE.2013.V3.282 Abstract—The most important challenge in cognitive radio networks is detection of primary user signal. Cooperation among secondary users increases the performance of the system significantly. In cooperative sensing in hostile environments, intruder nodes send false sensing results to the fusion center and make the fusion(More)
In this paper, a two step secure spectrum sensing algorithm is proposed for cognitive radio networks. In this algorithm, the sensing results of secondary users are pre-filtered and applying fuzzy logic, so, the overall sensing performance of the network is improved. To determine pre-filter parameters, statistical parameters of the sensing results are used(More)
In this paper, an energy efficient coding scheme for the multiple access relay channel at a fixed desired sum rate is analyzed. We first introduce a coding scheme, then, derive an optimal set of power allocation, which minimizes the network energy consumption while maintaining a desired sum rate. The results show that this scheme significantly outperforms(More)
Manuscript received 5-Nov.-2014 and revised 25-Jan.-2015, P-ISSN: 2322-4088 Accepted on 16March-2015 E-ISSN: 2322-3936 Abstract— From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, based on our previous work on Multiple Access Channel (MAC) and Multiple(More)
In this paper we obtain capacity region for discrete memoryless 2-receiver less noisy broadcast channel when channel state is known only at the receivers, then; this region is possibly extended to discrete time and continuous alphabet fading Gaus­sian 2-receiver less noisy broadcast channel and ergodic capacity of this fading channel is obtained.
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