Patent ID: 9564964
Date: 2017-02-07
CPC Classifications: H04B,H04L

Claim:
1. An optical signal processing device comprising: a count unit that divides at least one symbol region of a plurality of symbol regions into which signal points that specify symbol information included in an optical signal received are classified, into a plurality of division regions from a center coordinate of the symbol region and counts a number of signal points classified in a division region of the plurality of division regions in the symbol region, the optical signal including a plurality of phase signals; and a control unit that includes a determination unit that determines a shape of signal point distribution in the symbol region based on the counted number of signal points for every division region, and controls an average length that is related to a length of time during which phase signals are received from which a phase noise of the optical signal is calculated, based on the shape of the signal point distribution that is determined by the determination unit.