fourth generation wireless technology-PUBLISHED-PAPERS

Author:MURTADHA ALI NSAIF SHUKUR
Electronics & Communication Engineering
Department of Electronics & Communication Engineering
M.M Engineering College, Maharishi Markandeshwar University
Mullana Ambala India-133207

abstract

Wireless telecommunication history can be classified into different generations of network. Each generation has been a giant stride which revolutionized the field of mobile communication:

First generation (1G) in 1980 where all the systems where based on analog radio signal technology. Voice was considered to be the main traffic, Various 1G standards defined were Advance Mobile Phone System(AMPS), Nordic Mobile Telephone (NMT), Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA).

Second generation (2G) wireless communications systems, In 1990, 1G was replaced by 2G which provided rich set of services such as high voice quality and global mobility based on the digital radio signal technology. Here also voice was considered to be the main traffic, 2G includes standards such as Global System For Mobile Communications (GSM), General Packet Radio System (GPRS). Both 1G and 2G are based on circuit switched technology for data communication at low speed.2G was a huge success.