PAPR Reduction Techniques for Coherent Optical OFDM Transmission.pdf Evaluation of Effects of MZM Nonlinearity on QAM and OFDM Signals in RoF Transmitter.pdf Experimental Demonstration of Compensating the I-Q Imbalance and.pdf Fiber Nonlinearity Mitigation by PAPR Reduction in Coherent Optical OFDM Systems via Active Constellation Extension.pdf Nonlinear limits for high bit-rate O-OFDM systems.pdf