Patent ID: 8942574
Filing Date: 2015-01-27
Classification: H04B,H04L

Abstract:
1. A light receiving device comprising: a converter to digitalize an analog signal with a given sampling clock frequency, the analog signal being obtained through a photoelectric conversion of a received optical signal; a plurality of fixed distortion compensators to compensate an output signal of the converter for waveform distortion with a fixed compensation amount that is different from each other; a plurality of compensation amount detector to detect a distortion compensation amount based on a phase-shift-detection sensitivity of each output signal of the plurality of the fixed distortion compensators; a distortion compensator to compensate for distortion with a distortion compensation amount detected by the compensation amount detector; a phase-adjusting-amount determiner to determine a sampling phase adjusting amount with use of an output signal of the phase shift detector circuit; and a phase adjusting circuit to reduce a phase difference between the sampling clock frequency and the received optical signal based on a determination result of the phase-adjusting-amount determiner.