But for a weekend project, [Vinod.S] took the ultrasonic transmitter and receiver from a distance-meter module and used amplitude modulation to send music ultrasonically from his laptop to a ...

For pulse amplitude modulation (PAM) communicatio Optimum pulse amplitude modulation--I ... Optimum pulse amplitude modulation--I: Transmitter-receiver design and bounds from information theory ...

Uplink data rate is 100bit/s ith differential BPSK modulation, and the downlink is 600 bit/s GFSK. Industrial and consumer applications include environmental sensors, smart meters, patient monitors, ...