tailieunhanh - Báo cáo hóa học: " A Low-Cost Time-Hopping Impulse Radio System for High Data Rate Transmission"

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: A Low-Cost Time-Hopping Impulse Radio System for High Data Rate Transmission | EURASIP Journal on Applied Signal Processing 2005 3 397-412 2005 Hindawi Publishing Corporation A Low-Cost Time-Hopping Impulse Radio System for High Data Rate Transmission Andreas F. Molisch 1 Ye Geoffrey Li 2 Yves-Paul Nakache 1 Philip Orlik 1 Makoto Miyake 3 Yunnan Wu 4 Sinan Gezici 4 Harry Sheng 5 S. Y. Kung 4 H. Kobayashi 4 H. Vincent Poor 4 Alexander Haimovich 5 Jinyun Zhang1 1MERL Technology Lab Mitsubishi Electric Research Laboratories Cambridge MA 02139 USA Emails nakachey@ porlik@ jzhang@ 2 School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 USA Email liye@ information Technology R D Center Mitsubishi Electric Corporation 5-1-1 Ofuna Kamakura Kanagawa 247-8501 Japan Email 4 Department of Electrical Engineering Princeton University NJ 08544 USA Emails yunnanwu@ sgezici@ kung@ hisashi@ poor@ 5 Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102-1982 USA Emails hs23@ Received 10 October 2003 Revised 1 June 2004 We present an efficient low-cost implementation of time-hopping impulse radio that fulfills the spectral mask mandated by the FCC and is suitable for high-data-rate short-range communications. Key features are i all-baseband implementation that obviates the need for passband components ii symbol-rate not chip rate sampling A D conversion and digital signal processing iii fast acquisition due to novel search algorithms and iv spectral shaping that can be adapted to accommodate different spectrum regulations and interference environments. Computer simulations show that this system can provide 110 Mbps at 7-10 m distance as well as higher data rates at shorter distances under FCC emissions limits. Due to the spreading concept of time-hopping impulse radio the system can .