4G_Telecommunications

[laterunknown]

In telecommunications, 4G is the fourth generation of cell phone mobile communications standards. It is a successor of the third generation (3G) standards. A 4G system provides mobile ultra-broadband Internet access, for example to laptops with USB wireless modems, to smart phones, and to other mobile devices. Conceivable applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing and 3D television.

Key features
The following key features can be observed in all suggested 4G technologies:
• Physical layer transmission techniques are as follows:
o MIMO: To attain ultra high spectral efficiency by means of spatial processing including multi-antenna and multi-user MIMO
o Frequency-domain-equalization, for example multi-carrier modulation (OFDM) in the downlink or single-carrier frequency-domain-equalization (SC-FDE) in the uplink: To exploit the frequency selective channel property without complex equalization
o Frequency-domain statistical multiplexing, for example (OFDMA) or (single-carrier FDMA) (SC-FDMA, a.k.a. linearly precoded OFDMA, LP-OFDMA) in the uplink: Variable bit rate by assigning different sub-channels to different users based on the channel conditions
o Turbo principle error-correcting codes: To minimize the required SNR at the reception side
• Channel-dependent scheduling: To use the time-varying channel
• Link adaptation: Adaptive modulation and error-correcting codes
• Mobile-IP utilized for mobility
• IP-based femtocells (home nodes connected to fixed Internet broadband infrastructure)
As opposed to earlier generations, 4G systems does not support circuit switched telephony.

[lllindy457]

surprisingly gud

[kajal]

The Telecommunications manufacturing relationship (TIA) represent the international ICT commerce from beginning to end values expansion, encouragement, tradeshows, industry

[manibell]

ya nice post ,information about 4G, thanks

[herbertsmith]

4G is the latest technology which will soon take over the 3G market.4G was developed to provide secure broadband access for mobile devices such as smartphones, laptops, net books, wireless modems and other electronic devices requiring IP based broadband access. To consumers, this means their newly purchased mobile devices will have faster data speeds and provide a more reliable service experience.4G communication makes it possible for employees to participate in a video conference using a cell phone while in the field, or to tune in to high-quality streaming video via a mobile device.


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[maryjoyce]

Thanks for all your post will be really helpful for my small start up

[jordanhustin]

From Wikipedia, the free encyclopedia. Jump to: navigation, search. This article is about the mobile telecommunications standard. For other uses

[adyhooper]

4G Telecommunications is a fourth generation mobile communications. This 4G service offers ultra-broadband Internet access. 4G is a totally data based network which gives high bandwidth means data can be passed through the network.