A Low Power Impulse Radio Design for Body-Area-Networks
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This paper presents a low power radio design tailored to the short distance, low data rate application of body area networks. In our analysis we consider a comparison between traditional continuous wave radios and ultra wide band impulse radios for this application space. We analyze the energy/bit requirement for each of the architectures and discuss how a duty-cycled radio is better suited to low data rate applications due to practical design considerations. As a proof-of-concept we present the design and measured results of a duty-cycled, noncoherent impulse radio transceiver. The designed transceiver was measured to consume only 19 μW at a data-rate of 100 kbps. The design gives a BER of 10 -5 and works for a range of 2.5 m at an average Rx-sensitivity of -81 dBm. The designed transceiver enables both OOK and BPSK schemes and can be configured to use a pseudocoherent self-correlated signature detection and generation mechanism. This added functionality helps distinguish different types of pulses such as timing and data-pulses in real time. The transceiver was designed in a 90 nm CMOS process and occupies 2.3 mm 2 area.Keywords:
Transceiver
Duty cycle
Body area network
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Transceiver
Body area network
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Body area network
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Transceiver
Body area network
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A transceiver is a system that contains both a transmitter and a receiver. The transmitter from one transceiver sends a signal through space to the receiver of a second transceiver. After receiving the signal, the transmitter from the second transceiver sends a signal back to the receiver of the first transceiver, completing a two-way communications data link system, as shown in Figure 1.1. There are many factors to consider when designing a two-way communications link. The first one is to determine the operating frequency. Several consideration need to be evaluated to select the frequency that is going to be used.
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Body area network
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Human body
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