What Does Digital AMPS (D-AMPS) Mean?
Digital AMPS (D-AMPS) is second-generation (2G) cellular technology meant as a further development over the North-American first generation system called AMPS (Advanced Mobile Phone Service). D-AMPS was widely used in the USA and Canada ever since the first commercial cellular network was first deployed in 1993. D-AMPS technology has been retired and largely replaced by GSM/GPRS and CDMA2000 cellular technologies.
Techopedia Explains Digital AMPS (D-AMPS)
Digital AMPS, IS-54 and IS-136 standards, uses time division multiple access channel access method and is usually referred to as a TDMA System or simply TDMA rather than the more appropriate D-AMPS. D-AMPS uses existing AMPS technology to safely and easily transition from analog to digital systems in the same area, allowing for a quick upgrade from AMPS, the original analog standard system for cellular communication in the US and Canada.
- 48.6 kbit/s channel bit rate 1.62 bit/s/Hz 40 ms frame duration which is divided into 6.67 ms slots Each 6.67 ms slot contains 324bits and 260 user data Differential QPSK Vector Sum Excited Linear Prediction (VSELP)
