A New Dual mode GSM/EDGE transceiver using modulation loop

Transmitting data with GSM system is a real need. ETSI, the European Telecommunication Standard Institute, is working actually on a new standard, called EDGE, Enhanced Data rates for GSM Evolution, which will offer transmission data rate up to 384Kbits/s [1]. On the radio point of view, this new standard implies important modifications due to the modulation. For Dual mode hand portable, actual GSM transceiver has to be rebuilt. We are here presenting a new transmitter architecture which will enable dual mode functionality with minimum modification.