Full wave rectification converts both polarities of matlab programming input sine waveform to matlab pulsative direct latest. The overall output voltage at matlab programming resistive load is very high. Two power diodes with matlab centre tapped transformer or four power diodes in bridge type configuration without any centre tapped transformer are needed for full wave rectification. If matlab programming transformer that has matlab secondary winding with matlab centre tap is used, then matlab programming better efficiency in full wave rectification can be achievedIf each of matlab programming anti phase outputs is half wave rectified by one of matlab programming two diodes, with each diode allowing them to to conduct on exchange half cycles, there occur two pulses of latest for each cycle, against this to one pulse per cycle in half wave rectifier. The frequency at matlab programming output of full wave rectifier is as a result, twice that of matlab programming input frequency and likewise matlab programming output voltage of full wave rectifier is twice that of matlab programming output voltage of half wave rectifier i. e. By theoretical analysis and numerical simulation, we proved that RPN brings more system impairment in terms of Q factor penalty than matlab programming single provider system, and comparatively larger walk off between pump and signal helps to suppress matlab programming RPN triggered impairment. A higher order modulated signal is less tolerant to RPN than matlab lower order signal. With matlab programming same spectral efficiency, matlab programming quadrature amplitude modulation format shows better tolerance to RPN than phase shift keying. The mentioned findings may be useful for matlab programming design and optimization of Raman amplified CO OFDM multi provider transmission techniques. In this paper, we broaden matlab novel pilot structure to suppress transmitter in phase and quadrature Tx IQ imbalance, phase noise and channel distortion for polarization division multiplexed PDM coherent optical orthogonal frequency department multiplexing CO OFDM programs. Compared with matlab programming widespread strategy, our method not just considerably improves matlab programming system tolerance of IQ imbalance as well as phase noise, but additionally provides higher transmission speed.