telecom • networking • design

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Long Term Evolution (LTE) Tutorials

Here are a few hand picked links to LTE tutorials. Click here for the complete list.

LTE video tutorial

LTE video presentations

LTE physical layer

OFDM and SC-FDMA Signal Chains

LTE link layer design

data flow through PDCP, RLC, MAC and PHY layers of LTE

This article describes the LTE link-layer protocols, which abstract the physical layer and adapt its characteristics to match the requirements of higher layer protocols.The LTE link-layer protocols are optimized for low delay and low overhead and are simpler than their counterparts in UTRAN. The state -of-the-art LTE protocol design is the result of a careful crosslayer approach where the protocols interact with each other efficiently. This article provides a thorough overview of this protocol stack, including the sub-layers and corresponding interactions in between them, in a manner that is more intuitive than in the respective 3GPP specifications.

Introduction to LTE Architecture


This article provides an overview of the LTE radio interface, together with a more in-depth description of its features such as spectrum flexibility, multi-antenna transmission, and inter-cell interference control. The performance of LTE and some of its key features is illustrated with simulation results.

This article provides a high-level overview of LTE and some of its key components: spectrum flexibility, multi-antenna transmission, and ICIC. Numerical simulations are used to show the performance of the first release of LTE, as well as assess the benefit of the key features. Indeed these contribute strongly to LTE meeting its performance targets. An outlook of the evolution of LTE toward LTE-Advanced and full IMT-Advanced capabilities complete the article. Clearly, LTE offers highly competitive performance and provides a good foundation for further evolution.

LTE Protocol Stack

Click here for a more LTE tutorials that cover the entire spectrum of LTE development.

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LTE and WiMax Tutorial

Detailed presentation that covers the following topics:

  • Fundamental constraints from the Shannon Limit
  • Multipath radio propagation
  • Time varying multi-path channel
  • Cellular systems and frequency reuse
  • 4G enabling technologies
    • OFDM/OFDMA
    • SC-FDMA
    • MIMO
    • Fast channel-dependent scheduling
    • Fractional frequency reuse
  • OFDM
    • Orthogonal sub-carriers
    • OFDM implementation using DFT
    • Cyclic Prefix
    • Frequency Domain Equalization
  • SC-FDMA
    • Subcarrier mapping
    • SC-FDMA is DFT precoded OFDMA
    • PAPR characteristics
  • MIMO
    • Spatial diversity
    • Spatial multiplexing
  • Channel dependent scheduling
    • Select channels based on users signal quality in the resource grid
  • LTE specifications
    • Network architecture
    • Frame structure
    • Resource grid
    • Bandwidth configuration
  • LTE physical channels
  • LTE transport channels
  • LTE logical channels
  • Downlink physical channel processing
  • Uplink physical channel processing
  • Random access
  • LTE Advanced
    • Channel aggregation
    • Enhanced MIMO
  • WiMax


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3GPP LTE Evolved Packet System & Application to Femtocells

The Evolved Packet System (EPS) comprises the Long-Term Evolution (LTE) specifications of the 3GPP mobile network standard, including evolved radio access network (E-UTRAN) and system architecture evolution (SAE). This talk provides an overview of the 3GPP mobile network evolution, including the following topics: from GSM over UMTS to LTE and LTE-Advanced: the roots of next generation mobile network standards; 3GPP standardization architecture: specification groups and their responsibilities; overview of the LTE/SAE system architecture; quality of service architecture; overview of E-UTRAN; outlook on LTE-Advanced and beyond; and, of course, femtocells in LTE.