Low frequency ultrasonic communication system low frequency ultrasonic communication method low frequency ultrasonic sending apparatus and low frequency ultrasonic receiving apparatus

摘要

A low-frequency ultrasonic communication system according to the present invention includes: a low-frequency ultrasonic transmitter for transmitting data by low-frequency ultrasonic waves; And a low-frequency ultrasonic receiver for recovering the data by processing the low-frequency ultrasonic reception signal transmitted from the low-frequency ultrasonic transmitter. In the communication between the transmitter and the receiver, modulation is performed using a DPSK modulation scheme, Forward error correction coding is used.