Mr. Chul Kim Profile

Chul Kim

at Univ of New South Wales

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Proceedings Article | 21 December 2007 Paper

An ultra-wideband transceiver for biotelemetry systems

Chul Kim, Torsten Lehmann, Saeid Nooshabadi

Proceedings Volume 6798, 67980A (2007) https://doi.org/10.1117/12.758996

KEYWORDS: Transceivers, Signal attenuation, Telecommunications, Endoscopes, Computer architecture, Amplifiers, Image resolution, Monte Carlo methods, Systems modeling, Pulse generators

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This paper introduces an Ultra-Wideband (UWB) transceiver for in-vivo biotelemetry applications, especially for wireless endoscope. A system modeling, simulation and design trade-off analysis for an UWB impulse radio transceiver is presented that incorporates the human body attenuation effect, the IEEE 802.14a indoor channel model, and channel noise to determine an optimum architecture for the given applications. Based on the system simulation using Matlab, the severe effect from the human body attenuation has been identified and a non-coherent Transmit Reference (TR) Transceiver architecture with differential Binary Phase Shift Keying (DBPSK) modulation was selected as the best option for a communication link in biotelemetry applications. The transceiver consists of an all-digital transmitter with H-bridge output stage type of Pulse Generator (PG), wideband inductorless resistive shunt feedback Low Noise Amplifier (LNA) with thermal noise canceling, Gilbert mixer, Integrator, decision detector and Variable Delay Controller (VDC). The performance characteristics of the PG, LNA and mixer are presented by the circuit simulation results using 0.18μm digital CMOS technology.

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