LTE

4G LTE

The fourth generation of mobile network technology using Orthogonal Frequency Division Multiple Access (OFDMA) to deliver high-speed data rates up to 300 Mbps downlink and 75 Mbps uplink

Category: Wireless Standards

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Understanding 4G LTE

LTE (Long Term Evolution) uses OFDMA for the downlink and SC-FDMA for the uplink, operating across a wide range of frequency bands from 450 MHz to 3.8 GHz. Channel bandwidths range from 1.4 MHz to 20 MHz, with carrier aggregation combining up to five channels.

LTE-Advanced (4G+) introduced carrier aggregation, higher-order MIMO (up to 8x8), and relay nodes, pushing peak theoretical throughput beyond 1 Gbps. The all-IP architecture eliminated circuit switching entirely.

Common Questions

Frequently Asked Questions

What is the difference between 4G and LTE?

LTE is the standard that defines 4G technology. Early LTE did not meet full 4G speed requirements, but LTE-Advanced meets and exceeds them.

What frequencies does 4G LTE use?

4G LTE operates across numerous bands from 450 MHz to 3.8 GHz, with common US bands including 700 MHz (Band 13/17), 1700/2100 MHz (Band 4), and 1900 MHz (Band 2).

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