14-08-2013, 02:38 PM
A Data Modem for GSM Voice Channel
ABSTRACT
Here, they use the concept of SYMBOLS(encoded data), the symbols are voice coded as they were speech, modulated into the GSM signal, sent over the air, GSM demodulated, voice decoded, and converted back to data.
This paper introduces a novel approach to data communication over the Global System for Mobile Communications (GSM) voice channel.