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Báo cáo hóa học: " Research Article Probabilistic Coexistence and Throughput of Cognitive Dual-Polarized Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Probabilistic Coexistence and Throughput of Cognitive Dual-Polarized Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 387625 15 pages doi 10.1155 2010 387625 Research Article Probabilistic Coexistence and Throughput of Cognitive Dual-Polarized Networks J.-M. Dricot 1 G. Ferrari 2 A. Panahandeh 1 Fr. Horlin 1 and Ph. De Doncker1 1 OPERA Department Wireless Communications Group Universite Libre de Bruxelles Belgium 2 WASN Lab Department of Information Engineering University of Parma Italy Correspondence should be addressed to J.-M. Dricot jdricot@ulb.ac.be Received 30 October 2009 Revised 8 February 2010 Accepted 25 April 2010 Academic Editor Zhi Tian Copyright 2010 J.-M. Dricot et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Diversity techniques for cognitive radio networks are important since they enable the primary and secondary terminals to efficiently share the spectral resources in the same location simultaneously. In this paper we investigate a simple yet powerful diversity scheme by exploiting the polarimetric dimension. More precisely we evaluate a scenario where the cognitive terminals use cross-polarized communications with respect to the primary users. Our approach is network-centric that is the performance of the proposed dual-polarized system is investigated in terms of link throughput in the primary and the secondary networks. In order to carry out this analysis we impose a probabilistic coexistence constraint derived from an information-theoretic approach that is we enforce a guaranteed capacity for a primary terminal for a high fraction of time. Improvements brought about by the use of our scheme are demonstrated analytically and through simulations. In particular the main simulation parameters are extracted from a measurement campaign dedicated to the characterization of indoor-to-indoor