4G

4G LTE3G evolution4-G4G broadband4G data service4G wireless service4G+4G+ service4G-HSPA+4th Generation mobile telephony
4G is the fourth generation of broadband cellular network technology, succeeding 3G.wikipedia
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LTE Advanced

LTE-ALTE-Advanced4G+
Mobile WiMAX Release 2 (also known as WirelessMAN-Advanced or IEEE 802.16m') and LTE Advanced
It was formally submitted as a candidate 4G to ITU-T in late 2009 as meeting the requirements of the IMT-Advanced standard, and was standardized by the 3rd Generation Partnership Project (3GPP) in March 2011 as 3GPP Release 10.

IMT Advanced

IMT-AdvancedInternational Mobile Telecommunications (IMT)
A 4G system must provide capabilities defined by ITU in IMT Advanced.
International Mobile Telecommunications-Advanced (IMT-Advanced Standard) are the requirements issued by the ITU Radiocommunication Sector (ITU-R) of the International Telecommunication Union (ITU) in 2008 for what is marketed as 4G (or sometimes as 4.5G ) mobile phone and Internet access service.

Orthogonal frequency-division multiplexing

OFDMCOFDMOFDM system comparison table
The physical radio interface was at an early stage named High Speed OFDM Packet Access (HSOPA), now named Evolved UMTS Terrestrial Radio Access (E-UTRA).
OFDM has developed into a popular scheme for wideband digital communication, used in applications such as digital television and audio broadcasting, DSL internet access, wireless networks, power line networks, and 4G mobile communications.

3GPP

3rd Generation Partnership ProjectThird Generation Partnership Project (3GPP).3gpp

Mobile phone

cell phonemobile phonesmobile
The first two commercially available technologies billed as 4G were the WiMAX standard, offered in North America by Sprint, and the LTE standard, first offered in Scandinavia by TeliaSonera.

Metro by T-Mobile

MetroPCSMetro PCSMetroPCS Communications, Inc.
As of November 2012, the five publicly available LTE services in the United States are provided by MetroPCS, Verizon Wireless, AT&T Mobility, U.S. Cellular, Sprint, and T-Mobile US.
In 2013, the carrier engaged in a reverse merger with T-Mobile USA; post-merger, its services were merged under T-Mobile's 4G and LTE network.

IEEE 802.16

802.16802.16eIEEE 802.16e
The IEEE 802.16m or WirelessMAN-Advanced evolution of 802.16e is under development, with the objective to fulfill the IMT-Advanced criteria of 1 Gbit/s for stationary reception and 100 Mbit/s for mobile reception.

LTE (telecommunication)

LTE4G LTETD-LTE
The first-release Long Term Evolution (LTE) standard was commercially deployed in Oslo, Norway, and Stockholm, Sweden in 2009, and has since been deployed throughout most parts of the world. Since the first-release versions of Mobile WiMAX and LTE support much less than 1 Gbit/s peak bit rate, they are not fully IMT-Advanced compliant, but are often branded 4G by service providers.
LTE is commonly marketed as "4G LTE and Advance 4G", but it does not meet the technical criteria of a 4G wireless service, as specified in the 3GPP Release 8 and 9 document series for LTE Advanced.

U.S. Cellular

US CellularUnited States Cellular CorporationUnited States Cellular
As of November 2012, the five publicly available LTE services in the United States are provided by MetroPCS, Verizon Wireless, AT&T Mobility, U.S. Cellular, Sprint, and T-Mobile US.
U.S. Cellular announced that it would start offering 4G coverage to customers beginning in the first quarter of 2012.

Yota

YotaphoneScartelYota Devices
In Russia, Belarus and Nicaragua WiMax broadband internet access were offered by a Russian company Scartel, and was also branded 4G, Yota.
By September 2012, 4G commercial maintenance networks were launched in Novosibirsk, Krasnodar, Moscow, Sochi, Samara, Vladivostok, Ufa, Kazan, and St. Petersburg.

Three UK

Three33 UK
In the United Kingdom, LTE services were launched by EE in October 2012, by O2 and Vodafone in August 2013, and by Three in December 2013.
It provides 3G, 4G and 5G (certain areas) services through its own network infrastructure.

O2 (UK)

O2O 2 Cellnet
In the United Kingdom, LTE services were launched by EE in October 2012, by O2 and Vodafone in August 2013, and by Three in December 2013.
O2 publicly announced on 15 December 2009 that it had successfully demonstrated a 4G connection using LTE technology installed in six masts in Slough.

EE Limited

EEEverything EverywhereEE TV
In the United Kingdom, LTE services were launched by EE in October 2012, by O2 and Vodafone in August 2013, and by Three in December 2013.
EE owns and operates national 2G, 3G and 4G mobile phone networks in the UK.

Turbo code

turbo codesTurbo codingTurbo
Turbo codes are used in 3G/4G mobile communications (e.g., in UMTS and LTE) and in (deep space) satellite communications as well as other applications where designers seek to achieve reliable information transfer over bandwidth- or latency-constrained communication links in the presence of data-corrupting noise.

Spectral efficiency

system spectral efficiencylink spectral efficiencySpectral efficiency comparison table
In the field of mobile communications, a "generation" generally refers to a change in the fundamental nature of the service, non-backwards-compatible transmission technology, higher peak bit rates, new frequency bands, wider channel frequency bandwidth in Hertz, and higher capacity for many simultaneous data transfers (higher system spectral efficiency in bit/second/Hertz/site).

AT&T Mobility

AT&TCingularCingular Wireless
As of November 2012, the five publicly available LTE services in the United States are provided by MetroPCS, Verizon Wireless, AT&T Mobility, U.S. Cellular, Sprint, and T-Mobile US.
In 2011, it was reported that AT&T would upgrade its network to HSPA+ category 21 throughout the year, which it would promote as offering 4G-grade speeds.

WiMAX

Mobile WiMAXWiMAX ForumWi-Max
Mobile WiMAX Release 2 (also known as WirelessMAN-Advanced or IEEE 802.16m') and LTE Advanced Since the first-release versions of Mobile WiMAX and LTE support much less than 1 Gbit/s peak bit rate, they are not fully IMT-Advanced compliant, but are often branded 4G by service providers.
IEEE 802.16m or WirelessMAN-Advanced was a candidate for the 4G, in competition with the LTE Advanced standard.

Verizon Wireless

VerizonBell Atlantic MobileBoulder
As of November 2012, the five publicly available LTE services in the United States are provided by MetroPCS, Verizon Wireless, AT&T Mobility, U.S. Cellular, Sprint, and T-Mobile US.
Verizon Wireless operates a 4G LTE network, which, covers about 98 percent of the U.S. Before their LTE network was launched, they operated an exclusively CDMA2000 network (the other major CDMA2000 carrier in the US being Sprint).

Sprint Corporation

SprintSprint NextelSprint Nextel Corporation
As of November 2012, the five publicly available LTE services in the United States are provided by MetroPCS, Verizon Wireless, AT&T Mobility, U.S. Cellular, Sprint, and T-Mobile US.
In October 2010, as part of the "Network Vision" plan, Sprint CEO Dan Hesse announced the decommissioning of the iDEN network to reduce costs, improve the coverage and performance of the 3G CDMA network and enable Sprint Nextel to focus on 4G LTE technology.

3G

IMT-20003G networkIMT
4G is the fourth generation of broadband cellular network technology, succeeding 3G.
Compare data speeds with 3.5G and 4G.

CDMA2000

CDMA1xRTTCDMA 2000
The fastest 3G-based standard in the CDMA2000 family is the EV-DO Rev. B, which is available since 2010 and offers 15.67 Mbit/s downstream.
The intended 4G successor to CDMA2000 was UMB (Ultra Mobile Broadband); however, in November 2008, Qualcomm announced it was ending development of the technology, favoring LTE instead.

Vodafone UK

VodafoneUKVodafone Ltd
In the United Kingdom, LTE services were launched by EE in October 2012, by O2 and Vodafone in August 2013, and by Three in December 2013.

Spectrum auction

auctionFCC Spectrum auctionauctions
Mobile communication in particular has made many transitions since 2000, mobile technology has moved from second generation (2G) to third generation (3G) to fourth generation (4G) and is now in transition to fifth generation (5G) technology.

Cooperative MIMO

Cooperative wireless communicationsCooperative MIMO (CO-MIMO)cooperative relaying
IEEE 802.20, UMB and OFDM standards lack soft-handover support, also known as cooperative relaying.
Server-side implementations of Cooperative MIMO were the first to be adopted into the 4G cellular specifications and are essential for 5G.

MIMO

multiple-input multiple-outputMultiple-input multiple-output communicationsmultiple-input and multiple-output
The peak bit rate is further improved by smart antenna arrays for multiple-input multiple-output (MIMO) communications.
MIMO technology has been standardized for wireless LANs, 3G mobile phone networks, and 4G mobile phone networks and is now in widespread commercial use.