Performance Evaluation of Zigbee Transceiver for Wireless Body Sensor System

摘要

A cost effective impedance measurement system and a low cost transceiver device has been presented forwireless body sensor systems.The proposed device has an analog front end to measure bioimpedance andZigBee device which provides reliable wireless communication.Bioelectric Impedance measurementenables to characterize the state of tissues.Tetrapolar method is an advance method for measuringimpedance since it is a very easy and simple method for practical implementation.The principle of modifiedtetrapolar method and its wireless transimission through zigbee has been investigated here.Differentmodulation technique has been applied and it has been found that MSK based transceiver is an efficientone since it has low bit error rate and it produce constant envelope carrier signals which have noamplitude and phase varations,hence it will be a more power saving technique.