What Do GSM, TDMA, CDMA And AMPS Mean?
• GSM, TDMA, CDMA and AMPS are all forms of Wireless communication technologies. Each provides a different method of carrying data (or voice) from its source phone or computer to its destination phone or computer. Each is explained in some detail below: • GSM (Global System for Mobile communication) GSM is a digital mobile telephone system that is widely used around the world (especially in Europe). GSM uses a variation of TDMA and is the most widely used of all three digital wireless telephone technologies. GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot • TDMA (Time Division Multiple Access) TDMA (used in GSM, above) is a technology which divides each cellular channel into three slots in order to increase the amount of data that can be carried on a particular channel at a particular time. • CDMA (Code Division Multiple Access) CDMA, unlike TDMA and GSM, after digitizing data, spreads it out over the entire
