Implementation of ultrasonic communication for wireless body area network using amplitude shift keying modulation

Radio Frequency (RF) communication is always considered as the main choice to transmit data from wireless body area network devices. However, wireless communication using RF has radiation that can pierce through skin and have negative effect for body. An ultrasonic communication can be used as an alternative to transmit the data. In this paper, we have developed an ultrasonic communication system using amplitude shift keying (ASK) modulation. The data are taken from galvanic skin response sensor and processed by a microcontroller. The processed data then modulated using ASK modulation technique before transmitted using ultrasonic transducers. The results showed that the ultrasonic transducers are able to transmit data in relatively short range and narrow beamwidth. The ASK modulation technique performed well for modulating and demodulating the signal taken from GSR sensor.