COMPUTER - GENERATIONS

COMPUTER  -  GENERATIONS

Generations is meant  GIGA BYTES / SEC

2G

There were built mainly for voice services  and slow data transmissions.

2.5G

It is a stepping stone between 2G and 3G.

WAP,  MMS,  SMS,  mobile games,  search, 

3G

3^rd generation = 14 Mbit/sec.

GSM EDGE,  UMTS,  CDMA 2000,  DECT,  WiMax

Spectral efficiency.

UMTS set of NOKIA 6650

First pre comml.

3G was launched in May 2001.

3G RFs are separate from 2G.

3G costs enormously.

3 billion phones in 2007.

3G licence to 45, 40, 35 and 25 MHz in 2008.

For 1 frequency it costs 358 Euros.

Applications:-

1]         Mobile TV

2]         video or demand

3]         video conferencing

4]         tele-medicine

5]         location based services

Circuit switched and packet switched.

4G

Ultra broad band Sep. 2009.

1]         Scalable band with up at least 40 mhz

2]         IP telephony

3]         Ultra broad band access

4]         Gaming services

5]         HDTV

6]         Multimedia

7]         Video chat

8]         Mobile TV

9]         Digital Video broad casting

Channel band width 5 to 20 MHz. [ > 40 MHz ]

Data rate 100 Mbits/sec.

High speed 1 Gbits/sec.

It is packet switched.

Advanced antenna sustems = MIMO,  MU-MIMO

5G

Global mobile phone = iPhone

Bluetooth range 50 m.

8G

It provides improved printability wider process latitude.

Improved overall system performance.

Better resistivity.

10G

Good for WAN connections.

Sacred G

The next big thing in cellular market.

It neutralizes harmful em fields.

“Free shield” uses “Sacred G” technology.