tailieunhanh - Báo cáo hóa học: " Research Article Propagation in Tunnels: Experimental Investigations and Channel Modeling in a Wide"

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 Propagation in Tunnels: Experimental Investigations and Channel Modeling in a Wide | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 560571 9 pages doi 2009 560571 Research Article Propagation in Tunnels Experimental Investigations and Channel Modeling in a Wide Frequency Band for MIMO Applications . Molina-Garcia-Pardo 1 M. Lienard 2 and P. Degauque2 1Departamento de Tecnologia de la Information y la Comunicación Technical University of Cartagena 30202 Cartagena Spain telecommunications Interferences et Compatibilite Electromagnetique TELICE Institut d Electronique Microelectronique et Nanotechnologie IEMN University of Lille 59655 Villeneuve D Ascq France Correspondence should be addressed to . Molina-Garcia-Pardo Received 25 July 2008 Accepted 10 February 2009 Recommended by Jun-ichi Takada The analysis of the electromagnetic field statistics in an arched tunnel is presented. The investigation is based on experimental data obtained during extensive measurement campaigns in a frequency band extending from GHz up to 5 GHz and for a range varying between 50 m and 500 m. Simple channel models that can be used for simulating MIMO links are also proposed. Copyright 2009 . Molina-Garcia-Pardo 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 Narrowband wireless communications in confined environments such as tunnels have been widely studied for years and a lot of experimental results have been presented in the literature in environmental categories ranging from mine galleries and underground old quarries to road and railway tunnels 1-4 . However in most cases measurements dealt with channel characterization for few discrete frequencies often around 900MHz and 1800MHz. For example in 5 6 Zhang et al. report statistical narrowband and wideband measurement .