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Orthogonal Frequency Division Multiplexing (OFDM)

Orthogonal Frequency Division Multiplexing (OFDM). Ryan Smith Jay Visaria Yoav Klein Eric Cho. The Basics. QPSK Encoding. -System which encodes two bits per symbol -Each symbol has a real part, and imaginary part. Coordinate System. -Real and Imaginary axes

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Orthogonal Frequency Division Multiplexing (OFDM)

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  1. Orthogonal Frequency Division Multiplexing (OFDM) Ryan Smith Jay Visaria Yoav Klein Eric Cho

  2. The Basics • QPSK Encoding -System which encodes two bits per symbol -Each symbol has a real part, and imaginary part • Coordinate System -Real and Imaginary axes -Each Quadrant assigned a particular symbol

  3. Quadrant Break Down

  4. OFDM system with noise General model of an OFDM system Noise is picked up during data transmission How does OFDM cope with noise? How much noise can the system handle?

  5. Noise Issues

  6. Channeling • Increase in Speed Faster computation of FFT / IFFT due to parallel multiply accumulates. • Decrease in Noise Smaller noise margin due to smaller amount of data being transmitted per channel.

  7. Our OFDM System

  8. OFDM Applications • ADSL • Wireless networking • High Definition Television Broadcasts

  9. The End

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