Vehicular communication system, has carrier wave modulator that adds data to voice signal forming data-carrying signal transmitted and received by mobile global system and demodulating received signal to voice and data

摘要

The system has a carrier wave modulator (11) to modulate a data into analog signal that is added to the voice signal provided by voice pick-up device (2) to form a data-carrying voice signal. A global system for mobile (3) transmits and receives the data-carrying voice signal. A demodulator (12) discriminates the received data-carrying signal to voice signal and outputs through a voice output device (6).