TAILIEUCHUNG - Báo cáo hóa học: "Research Article Block Interleaved Frequency Division "

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 Block Interleaved Frequency Division | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 720973 18 pages doi 2009 720973 Research Article Block Interleaved Frequency Division Multiple Access for Power Efficiency Robustness Flexibility and Scalability Tommy Svensson 1 Tobias Frank 2 Thomas Eriksson 1 Daniel Aronsson 3 Mikael Sternad EURASIP Member 3 and Anja Klein2 1 Department of Signals and Systems Chalmers University of Technology SE-41296 Goteborg Sweden 2 Communications Engineering Laboratory Technische Universitat Darmstadt 64283 Darmstadt Germany 3 Signals and Systems Uppsala University SE-75121 Uppsala Sweden Correspondence should be addressed to Tommy Svensson Received 1 February 2009 Revised 20 June 2009 Accepted 27 July 2009 Recommended by Cornelius van Rensburg The multiple access solution in an IMT-Advanced mobile radio system has to meet challenging requirements such as high throughput low delays high flexibility good robustness low computational complexity and a high power efficiency especially in the uplink. In this paper a novel multiple access scheme for uplinks denoted as B-IFDMA is presented. We show that this scheme is able to provide equal or better error rate performance than the Single-Carrier Frequency Division Multiple Access SCFDMA schemes IFDMA and LFDMA when considering realistic channel estimation performance at the receiver and no reliable channel state information at the transmitter. We also show that B-IFDMA provides better amplifier efficiency than OFDMA and can provide better end-to-end energy efficiency than IFDMA and LFDMA. Moreover the scheme shows a promisingly high robustness to frequency-offsets and Doppler spread. Thus this scheme can be regarded as a promising solution for the uplink of future mobile radio systems. Copyright 2009 Tommy Svensson et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted

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