Short-Range Ultra-Wideband Systems

Abstract : This report describes UWB MURI activities from 1 May 2001 to 31 October 2006. The problems singled out in this research have two characteristics: They are caused by the extreme fractional bandwidth of ultra-wideband (UWB) radio, and they cannot be solved directly by conventional means. The major contributions of this UWB research effort are in the areas of link budget analysis, signal design, antenna/spice simulation, UWB receiver architecture and design in CMOS, low-complexity transmitted reference systems, rapid signal acquisition, channel capacity and security, etc. The 27 journal papers and 83 conference papers published under this program included four award-winning papers. Thirteen hardware components and systems were fabricated, including an UWB transceiver on a chip, an frequency-shifted UWB transmitted reference system, and a UWB radar for short-range imaging in free space and in a through-the-wall mode. This contract also co-sponsored work on two simulation efforts - the Berkeley Emulation Engine and the UMass UWB Link Simulator. Technology transfer was supported by six MURI sponsored meetings, including two UWB Workshops, and 29 talks at meetings supported by other entities.