Patent ID: 8478137
Filing Date: 2013-07-02
Classification: H04B,H04L

Abstract:
1. An optical receiver comprising: a coherent receiver to receive an optical signal; an A/D converter to convert an output signal of the coherent receiver into a digital signal representing the optical signal; a waveform distortion compensator to perform an operation on the digital signal to compensate for waveform distortion of the optical signal; a phase detector to generate phase information representing a sampling phase of the A/D converter; a phase adjuster to generate a digital signal representing an optical signal in which the sampling phase of the A/D converter is adjusted from an output signal of the waveform distortion compensator using the phase information; a demodulator to generate a demodulated signal from the output signal of the phase adjuster; a phase controller to control the sampling phase of the A/D converter; a peak detector to detect a peak value of the phase information while the sampling phase of the A/D converter is controlled by the phase controller; and a compensation controller to control the waveform distortion compensator using the peak value.