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.

Key Articles

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].