From the 1980’s to the smart phones of today’s hefty cordless phones, cellular phone technology has really experienced a change that was unbelievable. But have you ever thought about how it is possible to telephone together with the use of a cell phone to your well wisher in the entire world? In addition, you have understanding of the key characteristics including GPRS and WAP from providers and the mobile phone sellers. Nevertheless, you must conscious of what they actually mean?
There are various technologies that are cellular. Next time, when you’re going to buy a phone, you should be aware of what technologies it’s.
Generations of cellular connections
In the late 1970s, the very first generation (1G) of cellular connections was introduced; it was mainly used for voice transport. Second generation (2G) systems came into existence in the early 1990s and was further developed to 2.5G, which contains high technologies such as TDMA, GSM and CDMA. These technologies were used for data and voice.
The next generation of cellular connections is 3G which delivers data speeds from 384 kbps to 2 Mbps and over wireless interfaces including CDMA, TDMA and GSM.
Cell phone access technologies
Frequency division multiple access (FDMA)
The first-generation analog cellular telephone access system; for each call, FDMA uses frequencies that are different. For example , in case there are four stations, each will receive their particular frequency. So there’s no interference between the. It reduces noise, but restricts the amount of users.
Time division multiple access (TDMA)
TDMA allocates time slots that are unique to each user within each station, thereby enabling many users to get the radio frequency without the hindrance of anyone. Each cellular telephone dialog uses just a specific frequency time slot of the time.
Code division multiple access (CDMA)
Introduced in 1995 by Qualcomm, CDMA immediately became one of the planet ‘s quickest-growing wireless technologies. 3G CDMA networks provide more capability for voice traffic with high speed data capacities, thus many mobile service providers are currently constructing or updating to it.