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90° PowerPoint Presentation

90°

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90°

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  1. 1 1 4 2 2 1 3 1 90° 90° LO LO LO 4 2 2 LO 90° 90° 3

  2. Signal LO PBS Single-Polarization Downconverter II Single-Polarization Downconverter I

  3. Σ Σ Down-converter Loop Filter Phase Estimator Signal LO + + + −

  4. Slow Axis Signal PC RX PBS PBS Fast Axis Im Im Re Re

  5. v I h −90°

  6. Bit encoding Splitter Output DSP −90° −90° −90°

  7.   OFDM TX OFDM RX O/E Down-Conversion+Sampling AddPrefix RemovePrefix P/S S/P MZ Channel IFFT FFT Length Npre Length Npre Size Nc Size Nc LO Receiver Transmitter  Channel 

  8. +  −   PBS Sampler /DSP −90° PBS LO

  9. t=mT p(t) t=mT Dual-PolarizationDown-Converter DigitalEqualizer p(t) t=mT p(t) t=mT p(t) LO Symbol Decision + − Σ

  10. PBS PBS TXLaser LOLaser Channel MZ #1 MZ #2 Receiver FF Phase Estimator DigitalCoherent Receiver Soft Phase Estimator Signal LO Symbol Decision 

  11. … … … ■ □ ■ □ ● ● ○ ○

  12. Dual-PolarizationDown-Converter DD DD DD DD Avg. Avg. LO Dual-PolarizationDown-Converter LO  

  13. PBS OFDM TX #1 OFDM TX #1 MZ MZ Dual-PolarizationDown-Converter OFDM TX #2 OFDM RX #2 LO Soft Phase Est. Dual-PolarizationDown-Converter NLPNComp. Avg. Soft Phase Est. LO Symbol Decision  TED + − Loop Filter 

  14. PBS Pol. Rotate −90°

  15. +  − Dual-Polarization Down-converter     LO −90° −90° Single-Polarization Down-converter Single-Polarization Down-converter LO LO Ts Ts LPF LPF

  16. Decision Decision Symbol Decision Soft Phase Estimator

  17. DCF PBS PBS Dual-Pol. Down-Converter Digital Signal Processor LPF Pulse Carver DataModulation TX Laser LPF Channel LO Receiver Transmitter + + Digital Signal Processor Receiver Transmitter Channel