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A fully integrated UWB-IR (ultra-wideband impulse-radio) transceiver was developed for wireless body area networks. The transceiver includes all of the components required for the transceiver; a pulse generator and a power amplifier for a transmitter, an analog front-end circuit and analog-to-digital converters for a receiver, a base-band circuit, and a clock generator. The transmitter generates precisely...
A UWB-IR (ultra wideband-impulse radio) receiver for simultaneous data communication and locationing based on the TDOA (Time Difference of Arrival) system is presented. Because the target measurement error of the locationing is 30 cm, a challenging issue of the system is to suppress the measurement error of a time interval within 1 ns. The proposed receiver includes an accurate time-interval-measurement...
A low power ultra-wideband impulse radio (UWB-IR) receiver was developed in 0.18-mum CMOS. All circuits of the receiver AFE operate intermittently with a sampling clock of an analog-digital converter (ADC). The sampling rate of the ADC is equal to the pulse repetition frequency of the received signals. Power consumption of the receiver AFE is reduced by 60% using a developed intermittent operation...
A tagless location system is proposed and experimentally demonstrated. The delay profile of UWB impulse radio can be detected easily because of its nanosecond pulse width. This profile appears as spatial information such as the location of a person. The profile is influenced by the propagation environment. Therefore, we can use the delay profile associated with specific location information as an...
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