US 11,728,889 B2
Optical transmitting apparatus and transmission characteristics estimation method
Takeo Sasai, Musashino (JP); Fukutaro Hamaoka, Musashino (JP); Masanori Nakamura, Musashino (JP); and Seiji Okamoto, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/782,957
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 16, 2019, PCT No. PCT/JP2019/049232
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/124415, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2022/0416890 A1, Dec. 29, 2022
Int. Cl. H04B 10/2543 (2013.01); H04B 10/61 (2013.01)
CPC H04B 10/2543 (2013.01) [H04B 10/6161 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An optical reception device comprising:
a coefficient update section which optimizes a dispersion coefficient used in compensation of wavelength dispersion of a received signal obtained by receiving an optical signal according to a coherent detection method and a phase rotation amount used in compensation of a nonlinear optical effect of the received signal; and
a transmission characteristic estimation section which estimates a transmission characteristic of a transmission line by using the optimized dispersion coefficient and the optimized phase rotation amount.