Abstract :
Cellular radio started in the early 1980s by using analog technologies. Research in voice coding, modulation, and channel coding resulted in second-generation cellular radio based on digital technologies, which were introduced in the early 1990s. These were all based on advanced time division multiple access technology, resulting in better capacity and lower cost. Today, these digital technologies-based on the Global System for Mobility, digital Advanced Mobile Phone System, and personal digital cellular-have more than 100 million subscribers worldwide. The next step is to introduce wide-band packet services for wireless Internet up to 2 Mb/s. These so-called third-generation systems (Universal Mobile Telecommunications Services, IMT2000) are planned to be introduced in the early 2000s
Keywords :
Internet; broadband networks; digital radio; packet radio networks; personal communication networks; time division multiple access; 2 Mbit/s; GSM; Global System for Mobility; IMT2000; UMTS; Universal Mobile Telecommunications Services; advanced time division multiple access technology; capacity; channel coding; cost; digital Advanced Mobile Phone System; digital cellular radio; modulation; personal digital cellular; second-generation cellular radio; third-generation systems; voice coding; wide-band packet services; wireless Internet; 3G mobile communication; Channel coding; Costs; Digital modulation; Land mobile radio cellular systems; Mobile handsets; Modulation coding; Time division multiple access; Web and internet services; Wideband;
