文档介绍：the Evolution of Modern munication Technology
Radha Poovendran
In now highly the informationization society, the information and the correspondence have e the modern society “the life”. The information exchange mainly relies on puter correspondence, but corresponds takes the transmission method, with the sensing technology, puter technology fuses mutually, has e in the 21st century the international society and the world economic development powerful engine. In order to of adapt the time request, the new generation of munication technology seasonable and lives, the new generation of munication technology is the people said that third generation's core characteristic is the wide band addressing turns on non-gap roaming between the work and numerous munications system's, gains the munication services.
Along with the time progress, the technical innovation, people's life request's enhancement, the munication technology renewal speed is quite astonishing, almost every other ten year munication technology has a transformation update, from the 1980s “the mobile phone” to present's 3G handset, during has had two munication technology transformation, transits from 1G AMPS to 2G GSM, from GSM to IMT-2000 (. 3G technology). Knows modern on me the munication technology to have the following several aspect important technology:
1. wideband modulation and multiple access technique