OFDM

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OFDM

• Prepared By
• Jassim Al-Bazron
• AbdulMohsen Albeshr
• Mohammed Al-Eid
• For Dr Marwan Abu-Amara

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Agenda

• Definition
• How it works
• Uses

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Definition

• Orthogonal Frequency Division Multiplexing, an
  FDM modulation technique for transmitting large
  amounts of digital data over a radio wave.
• OFDM reduces the amount of crosstalk in signal
  transmissions. 802.11a WLAN, 802.16 and WiMAX
  technologies use OFDM.

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HOW OFDM WORKS?

• OFDM works by splitting the radio signal into
  multiple smaller sub-signals that are then
  transmitted simultaneously at different
  frequencies to the receiver.

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HOW OFDM WORKS?

• Parallel Data Streams
• Data Encoding is based on Amplitude Modulation
• Multiple Carriers are combined through the
  Fourier Series
• Computed by Inverse Fast Fourier transform

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Uses of OFDM

• ADSL
• Powerline Technology
• Wireless local area networks
• Terrestrial digital radio and television
  broadcasting
• Digital radio