tailieunhanh - Báo cáo hóa học: " Research Article Frequency Estimation in Iterative Interference Cancellation Applied to Multibeam Satellite Systems"

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 Frequency Estimation in Iterative Interference Cancellation Applied to Multibeam Satellite Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 62310 12 pages doi 2007 62310 Research Article Frequency Estimation in Iterative Interference Cancellation Applied to Multibeam Satellite Systems J. P Millerioux 1 2 3 4 M. L. Boucheret 2 C. Bazile 3 and A. Ducasse5 1 TeSA 14-16 Port Saint-Etienne 31000 Toulouse France 2Institut de Recherche en Informatique de Toulouse Ecole Nationale Superieure d Electrotechnique d Electronique d lnformatique d Hydraulique et des Telecommunications 2 Rue Camichel BP 7122 31071 Toulouse France 3 Centre National d Etudes Spatiales 18 Avenue E. Belin 31401 Toulouse Cedex 4 France 4 Ecole Nationale Superieure des Telecommunications 46 Rue Barrault 75634 Paris Cedex 13 France 5Alcatel Alenia Space 26 Avenue . Champollion BP 1187 31037 Toulouse France Received 31 August 2006 Revised 26 February 2007 Accepted 13 May 2007 Recommended by Alessandro Vanelli-Coralli This paper deals with interference cancellation techniques to mitigate cochannel interference on the reverse link of multibeam satellite communication systems. The considered system takes as a starting point the DVB-RCS standard with the use of convolutional coding. The considered algorithm consists of an iterative parallel interference cancellation scheme which includes estimation of beamforming coefficients. This algorithm is first derived in the case of a symbol asynchronous channel with time-invariant carrier phases. The aim of this article is then to study possible extensions of this algorithm to the case of frequency offsets affecting user terminals. The two main approaches evaluated and discussed here are based on 1 the use of block processing for estimation of beamforming coefficients in order to follow carrier phase variations and 2 the use of single-user frequency offset estimations. Copyright 2007 J. P. Millerioux et al. This is an open access article distributed under the Creative Commons .

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