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 Advanced Fade Countermeasures for DVB-S2 Systems in Railway Scenarios | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 49718 17 pages doi 2007 49718 Research Article Advanced Fade Countermeasures for DVB-S2 Systems in Railway Scenarios Stefano Cioni 1 Cristina Parraga Niebla 2 Gonzalo Seco Granados 3 Sandro Scalise 2 Alessandro Vanelli-Coralli 1 and Maria Angeles Vazquez Castro3 1 ARCES University of Bologna Via Toffano 2 40125 Bologna Italy 2 German Aerospace Center DLR Institute of Communications and Navigation Postfach 1116 82230 Wessling Germany 3 Department of Telecommunications and Systems Engineering Universitat Autonoma de Barcelona Campus Universitari s n 08193 Bellatera Barcelona Spain Received 22 October 2006 Accepted 3 June 2007 Recommended by Ray E. Sheriff This paper deals with the analysis of advanced fade countermeasures for supporting DVB-S2 reception by mobile terminals mounted on high-speed trains. Recent market studies indicate this as a potential profitable market for satellite communications provided that integration with wireless terrestrial networks can be implemented to bridge the satellite connectivity inside railway tunnels and large train stations. In turn the satellite can typically offer the coverage of around 80 of the railway path with existing space infrastructure. This piece of work representing the first step of a wider study is focusing on the modifications which may be required in the DVB-S2 standard to be employed in the forward link in order to achieve reliable reception in a challenging environment such as the railway one. Modifications have been devised trying to minimize the impact on the existing air interface standardized for fixed terminals. Copyright 2007 Stefano Cioni 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 Satellite .
