TDMA - Computer Definition
- A multiplexing technique used in digital wireless systems that divides each frequency channel into multiple time slots, each of which supports an individual conversation.The total available bandwidth, the bandwidth of the individual channels, and the number of time slots per channel vary according to the particular standard, as well as the specific coding technique employed.TDMA is the wireless variant of time division multiplexing (TDM) in the wireline domain. A TDMA system, such as GSM, employs both frequency division multiplexing (FDM) and TDMA. FDM derives multiple carrier channels from a wider band of assigned spectrum.Within each frequency channel, TDMA derives multiple time slots (i.e., digital channels), for which incoming and outgoing calls contend. Alternative multiplexing techniques employed in various cellular radio networks are code division multiple access (CDMA) and frequency division multiple access (FDMA). See also bandwidth, carrier, CDMA, channel, digital, E-TDMA, FDM, FDMA, frequency, GSM, multiplexing, TDM, time slot, wireless, and wireline.
- The vernacular name often applied to the North American IS-54 and IS-136 standards for cellular radio networks, more correctly known as Digital Advanced Mobile Phone System (D-AMPS).TDMA actually refers to Time Division Multiple Access, the access technique first specified in IS-54 and used in most 2G digital cellular networks, including those conforming to the pan-European GSM standard. See also 2G, cellular radio, D-AMPS, digital, GSM, IS-54, and IS-136.
(Time Division Multiple Access) A satellite and cellular phone air interface that interleaves multiple digital signals onto a single high-speed channel. For cellular systems, TDMA triples the capacity of the earlier analog method (FDMA). TDMA divides each channel into three subchannels providing service to three users instead of one. The GSM cellular system is based on TDMA, but GSM defines the entire network, not just the air interface. See cellular generations, FDMA, CDMA and CDPD.
tdma - Investment & Finance Definition
Stands for time-division multiple access, which is a technology used in wireless communication. It divides each cellular channel into three time slots, thereby increasing the amount of data that can be carried.