An ultra-wideband transceiver architecture for wireless endoscopes

This paper presents system modeling (SM), simulation and design trade-off analysis for an Ultra-Wideband (UWB) Impulse Radio (IR) transceiver for biotelemetry applications, particularly high resolution image data transmission in wireless endoscopes. The UWB system model was created incorporating the human body attenuation effect, the IEEE 802.14a indoor channel model, and channel noise so as to explore various design options to decide on an optimum architecture for the given application. In particular, human body attenuation effect, modulation options, quantization, correlation window size and link budget planning are introduced. 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 the communication link in wireless endoscopes.