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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Pulsed ultrawide band provides the energy needed for a high data-rate(More)
A direct-conversion receiver for 500MHz-wide FCC-compliant UWB pulses in the 3.1-10.6GHz licensed band is fabricated using 0.18/spl mu/m SiGe BiCMOS. The packaged chip consists of a wideband LNA, filter, phase-splitter, 802.11a switchable notch filter, 3.1-10.6GHz LO amplifiers, mixers, and baseband channel-select filters/buffers. The average conversion(More)
In the past few years, wireless microsensor networks have attracted a great deal of attention in the research community. This is due to the applications that will be enabled once wireless microsensor networks are in place. The design of wireless microsensor networks, however, represents a difficult challenge. Since many applications require fault-tolerant,(More)
— A custom UWB transceiver chipset is presented that communicates in three 550MHz-wide channels in the 3.1 to 5GHz band by using pulse position modulation (PPM). The transmitter uses an all-digital architecture and calibration technique to synthesize pulses with programmable width and center frequency. No analog bias currents or RF oscillators are required(More)
Ultra-wideband (UWB) communication is an emerging wireless technology that promises high data rates over short distances and precise locationing. The large available bandwidth and the constraint of a maximum power spectral density drives a unique set of system challenges. This paper addresses these challenges using two UWB transceivers and a discrete(More)
With portable electronics and wireless sensor networks becoming increasingly pervasive, energy efficient radios have become an active area of research [1-3]. A critical figure of merit (FOM) for measuring radio efficiency in such applications is energy per bit. Though sub-nJ/b data reception is achievable for data rates >100Mb/s using optimized coherent(More)