tailieunhanh - Báo cáo sinh học: " Editorial Filter Banks for Next Generation Multicarrier Wireless Communications"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Editorial Filter Banks for Next Generation Multicarrier Wireless Communications | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID314193 2 pages doi 2010 314193 Editorial Filter Banks for Next Generation Multicarrier Wireless Communications Markku Renfors EURASIP Member 1 Pierre Siohan 2 Behrouz Farhang-Boroujeny 3 and Faouzi Bader4 1 Department of Communications Engineering Tampere University of Technology . Box 553 33101 Tampere Finland 2 Orange Labs France Telecom 4 Rue du Clos Courtel 91226 35512 Cesson Sevigne Cedex France 3 Department of Electrical and Computer Engineering University of Utah Salt Lake City UT 84112-9206 USA 4 Centre Tecnologic de Telecommunication de Catalunya CTTC Parc Mediterrani de la Tecnologia Avinguda del Canal Olimpic Casstelldefels 08860 Barcelona Spain Correspondence should be addressed to Markku Renfors Received 3 May 2010 Accepted 3 May 2010 Copyright 2010 Markku Renfors 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. The theoretical capacity limits in communications can be approached by multicarrier techniques. With radio channels multicarrier techniques can be combined with multiantenna transmitters and receivers to provide efficiency. Existing or planned transmission systems rely on the OFDM technique to reach these goals and a considerable amount of research has been devoted to these techniques during the last 20 years. However OFDM has a number of drawbacks such as the use of the cyclic prefix to cope with the channel impulse response which results in a loss of capacity and the requirement of block processing to maintain orthogonality among all the subcarriers. Furthermore the leakage among frequency subbands has a serious impact on the performance of FFT-based spectrum sensing and OFDM-based cognitive radio in general. On the other hand digital .

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