IS-54

IS-54

(Interim Standard-54) The first generation of the TDMA digital cellular system which was released in early 1991. See IS-136.
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The level of nonlinearity is specified in the IS-54 standard [3] by the out-of-band power emission levels.
We were "transitioning between IS-54 and IS-136 so we were out of the TDMA market while transitioning.
The simulator is capable of both RF-to-RF and baseband-to-baseband interfaces with predefined channel models for GSM, DCS, IS-54, IS-95, TETRA and International Telecommunication Union models.
The digital phone will work on AT&T Wireless Services' (AWS) TDMA (time division multiple access) system in Dallas, which in June was upgraded to the more advanced IS-136 standard from the older IS-54 standard AT&T is one of the first companies to roll out an upgraded system, with build-out in all 29 of its TDMA markets expected by the end of this year, a spokeswoman for the company said.
The 89451A software is advantageous particularly for the analysis of NADC [Pi]/4 DQPSK signals in that it presets the instrument to assure compliance with IS-54 while making the relatively complex measurements.
The section also contains papers on second-generation systems; the Pan-European Cellular System; the IS-54 digital standard; code-division multiple access technology and the IS-95 North American standard; the Japanese cellular standard; CT-2, the British cordless telephone standard; Digital European Cordless Telephones; the race program; half-rate standards; modulation methods; wireless local area networks; and wireless data.