Design and Implementation of Efficient Multichannel Data Compression in Wireless Sensor Nodes

Recent technological advances in sensors, low-power integrated circuits, and wireless communications have enabled the design of low-cost, miniature, lightweight, and intelligent physiological sensor nodes. These nodes, capable of sensing, processing, and communicating one or more vital signs. Implementing a system designed with PIC microcontroller to collect the raw analog data from the multi channel. It digitalizes the data and compresses the data according to the desired sample rate and bit resolution. The realization of a multichannel data compression system by using all digital method has the characteristics of high reliability, strong anti-disturbance, good flexibility and convenient for application. Results of the analysis show that a digital implementation is significantly more energy-efficient for the wireless sensor space where signals require high gain and medium to high resolutions.