tailieunhanh - Báo cáo hóa học: "Research Article Improving HSDPA Indoor Coverage and Throughput by Repeater and Dedicated Indoor System "

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 Improving HSDPA Indoor Coverage and Throughput by Repeater and Dedicated Indoor System | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 951481 11 pages doi 2008 951481 Research Article Improving HSDPA Indoor Coverage and Throughput by Repeater and Dedicated Indoor System Tero Isotalo Panu Lahdekorpi and Jukka Lempiainen Department of Communications Engineering Tampere University of Technology . Box553 33101 Tampere Finland Correspondence should be addressed to Tero Isotalo Received 5 September 2008 Accepted 14 December 2008 Recommended by Ibrahim Develi The target of the paper is to provide guidelines for indoor planning and optimization using an outdoor-to-indoor repeater or a dedicated indoor system. The paper provides practical information for enhancing the performance of high-speed downlink packet access HSDPA in an indoor environment. The capabilities of an outdoor-to-indoor analog WCDMA repeater are set against a dedicated indoor system and furthermore compared to indoor coverage of a nearby macrocellular base station. An extensive measurement campaign with varying system configurations was arranged in different indoor environments. The results show that compared to dedicated indoor systems similar HSDPA performance can be provided by extending macrocellular coverage inside buildings using an outdoor-to-indoor repeater. According to the measurements the pilot coverage planning threshold of about -80 dBm ensures a 2500 kbps throughput for shared HSDPA connections. Improving the coverage above -80 dBm seems to provide only small advantage in HSDPA throughput. Of course the pilot planning thresholds may change if different channel power allocations are used. In addition network performance can be further improved by increasing the antenna density in the serving distributed antenna system. Finally good performance of repeater implementation needs careful repeater gain setting and donor antenna siting. Copyright 2008 Tero Isotalo et al. This is an open .