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Báo cáo hóa học: "Impact of Clustering in Indoor MIMO Propagation Using a Hybrid Channel Model"

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: Impact of Clustering in Indoor MIMO Propagation Using a Hybrid Channel Model | EURASIP Journal on Applied Signal Processing 2005 11 1698-1711 2005 Hindawi Publishing Corporation Impact of Clustering in Indoor MIMO Propagation Using a Hybrid Channel Model Zhongwei Tang Microwave and Wireless Technology Research Laboratory Information and Communication Group Faculty of Engineering University of Technology Sydney L24 B1 P.O. Box 123 Broadway NSW2007 Australia Email zhongwei@eng.uts.edu.au Ananda Sanagavarapu Mohan Microwave and Wireless Technology Research Laboratory Information and Communication Group Faculty of Engineering University of Technology Sydney L24 B1 P.O. Box 123 Broadway NSW2007 Australia Email ananda@eng.uts.edu.au Received 1 March 2004 Revised 7 October 2004 The clustering of propagating signals in indoor environments can influence the performance of multiple-input multiple-output MIMO systems that employ multiple-element antennas at the transmitter and receiver. In order to clarity the effect of clustering propagation on the performance of indoor MIMO systems we propose a simple and efficient indoor MIMO channel model. The proposed model which is validated with on-site measurements combines the statistical characteristics of signal clusters with deterministic ray tracing approach. Using the proposed model the effect of signal clusters and the presence of the line-of-sight component in indoor Ricean channels are studied. Simulation results on channel efficiency and the angular sensitivity for different antenna array topologies inside a specified indoor scenario are also provided. Our investigations confirm that the clustering of signals significantly affects the spatial correlation and hence the achievable indoor MIMO capacity. Keywords and phrases angle sensitivity channel efficiency indoor propagation signal clusters MIMO Ricean K factor ray tracing. 1. INTRODUCTION The multiple-input multiple-output MIMO technique is being tipped as one of the most significant breakthroughs in wireless communications for achieving high .