tailieunhanh - Báo cáo hóa học: " ADAM: A Realistic Implementation for a W-CDMA Smart Antenna"

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: ADAM: A Realistic Implementation for a W-CDMA Smart Antenna | EURASIP Journal on Applied Signal Processing 2004 9 1384-1406 2004 Hindawi Publishing Corporation ADAM A Realistic Implementation for a W-CDMA Smart Antenna Ramon Martinez Rodriguez-Osorio Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email ramon@ Laura García García Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email lgg@ Alberto Martinez Ollero Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email alberto@ Francisco Javier Garcia-Madrid Velazquez Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email javiergmv@gr. Leandro de Haro Ariet Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email leandro@ Miguel Calvo Ramon Department of Signals Systems and Radiocommunications Polytechnic University of Madrid 28040 Madrid Spain Email miguel@ Received 30 May 2003 Revised 28 November 2003 Adaptive-type smart antennas do not usually operate on the deployed universal mobile telecommunication system UMTS scenarios although UTRA UMTS terrestrial radio access foresees their operation and they would improve capacity especially in mixed-service environments. This paper describes the implementation of a software radio-based version of an adaptive antenna named ADAM that can be used with any standard Node B both in the up- and downlinks. This transparent operational feature has been made possible by the partial cancelation algorithm applied in the uplink by means of a common beamforming vector. Firstly a general description of the system as well as the theory of its operation are described. Next the hardware architecture is presented showing the real implementation. Also a complete software description is done. Finally