telecom • networking • design

an EventHelix.com blog

LTE EPS Architecture Overview

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Excellent video describing the Evolved Packet Core used in LTE networks. The video describes the roles played by the major LTE components:

  • eNodeB
  • MME
  • S-GW
  • P-GW
  • HSS
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OFDM and SC-FDMA lectures

OFDM and SC-FDMA video lectures cover OFDM and SC-FDMA is great detail. The following topics are covered:

  • OFDM and multi-carrier modulation
  • Converting a frequency selective channel to a flat fading channel
  • IFFT based multi-carrier modulator bank
  • FFT based multi-carrier demodulator bank
  • Cyclic prefix and circular convolution
  • MIMO OFDM
  • PAPR in OFDM
  • SC-FDMA reduces PAPR

OFDM transmitter schematic

OFDM receiver schematic

Click here to view the OFDM and SC-FDMA lectures