Đang chuẩn bị liên kết để tải về tài liệu:
Báo cáo hóa học: " Research Article Channel Characteristics and Transmission Performance for Various Channel Configurations at 60 GHz"

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 Channel Characteristics and Transmission Performance for Various Channel Configurations at 60 GHz | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 19613 15 pages doi 10.1155 2007 19613 Research Article Channel Characteristics and Transmission Performance for Various Channel Configurations at 60 GHz Haibing Yang Peter F. M. Smulders and Matti H. A. J. Herben Department of Electrical Engineering Eindhoven University of Technology P.O. Box513 5600 MB Eindhoven The Netherlands Received 13 June 2006 Accepted 20 March 2007 Recommended by Chia-Chin Chong Extensive measurements are conducted in room environments at 60 GHz to analyze the channel characteristics for various channel configurations. Channel parameters retrieved from measurements are presented and analyzed based on generic channel models. Particularly a simple single-cluster model is applied for the parameter retrieval and performance evaluation. By this model power delay profiles are simply described by a K-factor a root-mean-squared delay spread and a shape parameter. The considered channels are configured with the combination of omnidirectional fan-beam and pencil-beam antennas at transmitter and receiver sides. Both line-of-sight LOS and non-LOS NLOS channels are considered. Further to evaluate the transmission performance we analyze the link budget in the considered environments then design and simulate an OFDM system with a data rate of 2 Gbps to compare the bit-error-rate BER performance by using the measured and modeled channels. Both coded and uncoded OFDM systems are simulated. It is observed that the BER performance agrees well for the measured and modeled channels. In addition directive configurations can provide sufficient link margins and BER performance for high data rate communications. To increase the coverage and performance in the NLOS area it is preferable to apply directive antennas. Copyright 2007 Haibing Yang et al. This is an open access article distributed under the Creative Commons Attribution License which permits .