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Significant Overhead Reduction of Multi-band Tb/s Coherent Optical OFDM Systems
Multi-band Tb/s Coherent Optical OFDM Systems Overhead Reduction
2015/5/15
The timing and optical laser phase of individual bands in multi-band OFDM are correlated. We significantly reduce the OFDM overhead through using FFT window synchronization for channel estimation and ...
Impact of Polarization-mode Dispersion on Wavelet Transform Based Optical OFDM Systems
Fiber optics communications Modulation
2015/6/4
The impact of PMD on wavelet transform based optical OFDM (WTO-OFDM) systems is investigated. Simulations show that WTO-OFDM is very sensitive to PMD. A 1-dB penalty at 5-ps DGD is incurred for 112-Gb...
Fiber Nonlinearity Mitigation by PAPR Reduction in Coherent Optical OFDM Systems via Active Constellation Extension
Fiber Nonlinearity PAPR Optical OFDM Systems Active Constellation Extension
2015/8/4
We consider Active Constellation Extension to reduce the PAPR in CO-OFDM systems. We find that the nonlinearity threshold is improved by 1.5 dB at a reach of 400 km SSMF fiber.
Improved Frequency Offset Correction in Coherent Optical OFDM Systems
Frequency Offset Correction Optical OFDM Systems
2015/7/30
We extended a pilot symbol frequency offset estimation scheme and applied it in combination with a pilot subcarrier compensator. Optimum system sensitivity was found up to few 100MHz frequency offset.