4G LTE

4G LTE logo
Full Name
Long Term Evolution
DL Multiplexing
UL Multiplexing
Duplexing

4G LTE (Long Term Evolution) or the E-UTRAN (Evolved Universal Terrestrial Access Network), introduced in 3GPP Rel. 8, is the radio access component of the Evolved Packet System (EPS) - a purely IP based mobile network standard. As an evolution to 3G UMTS, 4G LTE shares many similarities, such as harmonised frequency bands, but also many substantial technological advancements.

LTE is based on OFDMA (Orthogonal Frequency Division Multiple Access) and in combination with higher order modulation (up to 256QAM), large bandwidths (up to 100 MHz aggregate), and spatial multiplexing (MIMO) techniques very high data rates can be achieved.

LTE is developed for a number of frequency bands – E-UTRA operating bands- currently ranging from 450 MHz up to 6 GHz. The available bandwidths are also flexible starting with 0.2 MHz up to 20 MHz. LTE is developed to support both the time division duplex technology (TDD) as well as frequency division duplex (FDD).

Deployed LTE Networks

The following chart shows the number of active 4G LTE networks, distributed by LTE frequency band. These data are rendered live and may update unexpectedly.

Key Articles

A 4G LTE network can be classed based on the state of its evolution within the LTE standard.

LTE has been developed to operate on paired spectrum for Frequency Division Duplex (FDD), and unpaired spectrum for Time Division Duplex (TDD).

The following document serves to provide a general introduction to how data rates are estimated in LTE.

Carrier Aggregation (CA) is a technique used in LTE-Advanced to increase the peak data rate (i.e., maximum available speed) of a 4G LTE network.

This page lists LTE channel bandwidths per 3GPP 36.101 Rel. 14 [September 2017].