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Blind Known Interference Cancellation

Blind Known Interference Cancellation. Zhang Shengli (Shenzhen University) 2012. 1.12. Background. Analog network coding Software defined radio help us find new research problems. Known Interference. Successive interference cancellation Relay networks Over hearing.

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Blind Known Interference Cancellation

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  1. Blind Known Interference Cancellation Zhang Shengli (Shenzhen University) 2012. 1.12

  2. Background • Analog network coding • Software defined radio help us find new research problems

  3. Known Interference • Successive interference cancellation • Relay networks • Over hearing

  4. Traditional Cancellation • Two Steps: • Interfering channel estimation • Subtracting Interference • Obstacle: channel estimation • Cooperation design in ANC paper • Cooperation cost • Direct estimation with interference • Bad performance • Non-coherent detection • 3dB performance loss

  5. BKIC(1)

  6. BKIC(2) • Step 1: • Step 2 (critical step):

  7. Recovering Scheme1 • Straightforward way • Equivalent to traditional cancellation

  8. Recovering Scheme2 • Real-valued BP

  9. Multipath Case • Scheme 1: cancel all the paths of the interference with complex RBP in one cycle • To be done • Scheme2: cancel each path one by one

  10. Performance • Flat fading

  11. Performance • Flat fading

  12. Performance • Time selective fading

  13. Performance • Frequency selective fading

  14. Performance • Frequency selective fading

  15. Conclusion and Future Work • BKIC is a novel algorithm for a mature problem • It’s of great practical interest and it also needs more theoretical study • In the future, we may focus on its application in different areas and its implementation with SDR.

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