News tagged with 4g
Verizon says it's ending unlimited data plans
A Verizon official announced the company will begin forcing users with grandfathered-in unlimited data plans to choose data share plans when they migrate to the company's 4G network.
May 18, 2012 |
1 / 5 (2) |
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Cellphone trade show kicks off in New Orleans
(AP) -- CTIA Wireless, the U.S. cellphone phone industry's annual trade show that starts Tuesday, is drawing heavy participation not just from the cellphone industry, but from MasterCard, Visa, and other companies in the ...
May 08, 2012 |
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T-Mobile picks Ericsson, Nokia Siemens for network
(AP) -- T-Mobile USA on Tuesday said that Nokia Siemens Networks and LM Ericsson AB will supply the network equipment for its new wireless broadband network, a project worth $4 billion.
May 08, 2012 |
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Bharti Airtel offers 4G service in India
India's Bharti Airtel said on Tuesday it had become the first company in the country to offer high-speed Internet services using fourth-generation (4G) telecommunications technology.
Apr 10, 2012 |
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Apple looks to tighten tablet market grip with new iPad
Apple will be looking to tighten its grip on the tablet market on Friday with the release of its newest iPad, increasing pressure on Google to make rival Android devices more enticing.
Electronics / Consumer & Gadgets
Mar 15, 2012 |
1.7 / 5 (3) |
2
Businesses eyeing iPads for the workplace: report
Survey results released on Tuesday showed that growing numbers of businesses plan to buy iPads as tablet computers make their way from personal lives into work places.
Electronics / Consumer & Gadgets
Mar 13, 2012 |
1 / 5 (1) |
0
'Homeless Hotspot' stunt stirs debate at SXSW
(AP) -- A charitable marketing program that paid homeless people to carry Wi-Fi signals at South By Southwest has drawn widespread debate at the annual Austin conference and around the country.
Mar 13, 2012 |
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1
Apple says shipment of new iPad may take 2-3 weeks
Apple said that shipments of its new iPad to customers who order it online may take two to three weeks but that the tablet would still be available in stores on Friday.
Electronics / Consumer & Gadgets
Mar 12, 2012 |
1.5 / 5 (2) |
0
New record low-power multi-standard transceiver for sensor networks
Imec and Holst Centre announce a 2.3/2.4GHz transmitter for wireless sensor applications compliant with 4 wireless standards (IEEE802.15.6/4/4g and Bluetooth Low Energy). The transmitter has been fabricated ...
Feb 23, 2012 |
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0
US regulators pull plug on LightSquared
US telecom regulators have pulled the plug on an ambitious plan to build a high-speed wireless broadband network, citing potential interference with GPS navigation devices.
Feb 15, 2012 |
5 / 5 (2) |
12
Motorola sharpens Droid Razr with Maxx
The Razr is among the elite of Android devices. Motorola sharpens its Razr brand further with the 4G LTE Droid Razr Maxx which was released at Verizon for $300 with a two year agreement.
Electronics / Consumer & Gadgets
Feb 02, 2012 |
1 / 5 (1) |
0
UN sets stage for blazing fast new mobile devices
(AP) -- A United Nations telecom meeting has approved the next generation of mobile technology, which experts say will make devices 500 times faster than 3G smartphones and eliminate the wait time between the tap of a finger ...
Jan 19, 2012 |
3 / 5 (2) |
1
6 tech trends to watch for in 2012
For tech companies, 2011 was feast or famine.
Jan 05, 2012 |
5 / 5 (1) |
3
Verizon 4G network crashes again
A high-speed smartphone data service freshly rolled out by Verizon crashed anew on Wednesday as the US telecom titan continued to work out issues with its new-generation network.
Dec 21, 2011 |
4 / 5 (2) |
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Researchers find some smartphone models more vulnerable to attack
New research from North Carolina State University shows that some smartphones specifically designed to support the Android mobile platform have incorporated additional features that can be used by hackers to bypass Android's ...
Nov 30, 2011 |
5 / 5 (1) |
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4G
In telecommunications, 4G is the fourth generation of cellular wireless standards. It is a successor to the 3G and 2G families of standards. In 2009, the ITU-R organization specified the IMT-Advanced (International Mobile Telecommunications Advanced) requirements for 4G standards, setting peak speed requirements for 4G service at 100 Mbit/s for high mobility communication (such as from trains and cars) and 1 Gbit/s for low mobility communication (such as pedestrians and stationary users).
A 4G system is expected to provide a comprehensive and secure all-IP based mobile broadband solution to laptop computer wireless modems, smartphones, and other mobile devices. Facilities such as ultra-broadband Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users.
IMT-Advanced compliant versions of LTE and WiMAX are under development and called "LTE Advanced" and "WirelessMAN-Advanced" respectively. ITU has decided that LTE Advanced and WirelessMAN-Advanced should be accorded the official designation of IMT-Advanced. On December 6, 2010, ITU recognized that current versions of LTE, WiMax and other evolved 3G technologies that do not fulfill "IMT-Advanced" requirements could nevertheless be considered "4G", provided they represent forerunners to IMT-Advanced and "a substantial level of improvement in performance and capabilities with respect to the initial third generation systems now deployed."
As seen below, in all suggestions for 4G, the CDMA spread spectrum radio technology used in 3G systems and IS-95 is abandoned and replaced by OFDMA and other frequency-domain equalization schemes. This is combined with MIMO (Multiple In Multiple Out), e.g., multiple antennas, dynamic channel allocation and channel-dependent scheduling.
For more information about 4G, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
