telecom • networking • design

an EventHelix.com blog


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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.

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