Whose 4G is fastest? AT&T, Sprint or Verizon

Just because you slap a shiny label on something doesn't make it so. All the major wireless carriers are now touting faster 4G networks, but the networks themselves are far from identical.

New 4G network could cause widespread GPS dead zones

(PhysOrg.com) -- If a plan to build new 4G mobile phone base stations in the US goes ahead, engineers say GPS satellite navigation systems will be seriously jammed and huge areas of the country will become GPS dead zones.

Finland allocates new 4G mobile frequencies

The Finnish government said Friday it has allocated extra frequencies to telecom firms TeliaSonera, Elisa and DNA to run the country's new, faster fourth-generation (4G) mobile network.

New technology to enable development of 4G solar cells

Professor Ravi Silva of the University of Surrey's Advanced Technology Institute has identified the range of combinations of organic and inorganic materials that will underpin new 4th generation solar cell technology – ...

How 5G could democratise the telecoms industry

A new, digital revolution might be about to hit us. Autonomous cars are driving our way, cities and companies are rapidly ramping up the use of sensors—also called the Internet of Things (IoT) – and virtual and augmented ...

Verizon reveals first 4G wireless tablets, phones (Update)

(AP) -- This year, the big national wireless carriers will be racing to stake their claims in the new frontier of service: ultra-fast data access - for smart phones and laptops as well as for gadgets like tablets.

'Fourth generation' Internet arrives in Hong Kong

The latest generation of wireless Internet that will allow people to watch a crystal clear movie or live sporting event on the street or atop a hill is being deployed throughout Hong Kong.

Samsung Epic 4G Coming to Sprint

Sprint and Samsung today introduced the second 4G-capable handset from Sprint, Samsung Epic 4G, a Galaxy S smartphone and Samsung Mobile's first 4G Android-powered device.

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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.

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