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Báo cáo hóa học: " Research Article How Equalization Techniques Affect the TCP Performance of MC-CDMA Systems in Correlated Fading Channels"

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 How Equalization Techniques Affect the TCP Performance of MC-CDMA Systems in Correlated Fading Channels | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 286351 11 pages doi 10.1155 2008 286351 Research Article How Equalization Techniques Affect the TCP Performance of MC-CDMA Systems in Correlated Fading Channels Barbara M. Masini 1 Giacomo Leonardi 1 Andrea Conti 2 Gianni Pasolini 1 Alessandro Bazzi 1 Davide Dardari 1 and Oreste Andrisano1 1WiLab University of Bologna Viale Risorgimento 2 40136 Bologna Italy 2ENDIF University of Ferrara 44100 Ferrara Italy Correspondence should be addressed to Barbara M. Masini barbara.masini@unibo.it Received 30 April 2007 Revised 24 August 2007 Accepted 2 November 2007 Recommended by Arne Svensson This paper investigates the impact of several equalization techniques for multicarrier code division multiple access systems on the performance at both lower and upper layers i.e. physical and TCP layers . Classical techniques such as maximal ratio combining equal gain combining orthogonality restoring combining minimum mean square error as well as a partial equalization PE are investigated in time- and frequency-correlated fading channels with various numbers of interferers. Their impact on the performance at upper level is then studied. The results are obtained through an integrated simulation platform carefully reproducing all main aspects affecting the quality of service perceived by the final user allowing an investigation of the real gain produced by signal processing techniques at TCP level. Copyright 2008 Barbara M. Masini 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. 1. INTRODUCTION Multicarrier code division multiple access MC-CDMA techniques have achieved considerable attention and owing to their efficiency in counteracting both multiuser interference and frequency selective fading are also .