Application of OFDM Technology in GSM Voice Channel
Luyong Zhang · Radio Engineering of China · 2009
Long-distance data transmission and the security of data transmission are always problems people are concerned about,and using voice channel for data transmission is an option.By using the GSM channel and adopting OFDM technology,a system composed of PC,mobile-phone,A/D converter and D/A converter can accomplish long-distance data transmission.Based on the technology characteristics of OFDM,the OFDM modulation and demodulation system of GSM voice channel is implemented.Through many experiments,the BER curve proves that the design achieves the original design requirements,and the system has good prospect in voice secure data communication and other kinds of data transmission.