PATENT CLAIM ANALYSIS

Application Number: 15748892
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-01
Patent Classification: ["398", "065000"]

Abstract:
A coherent optical reception device includes a local oscillation laser that supplies laser light, a coherent optical reception front-end unit that receives a multi-level modulated optical signal, demodulates the optical signal on the basis of the laser light, and converts a demodulated optical signal into an electrical analog signal, an analog-to-digital converter that converts the analog signal into a digital signal, a compensation unit that compensates for an influence of dispersion due to a wavelength or a polarized wave of the optical signal and recovers a carrier phase of the digital signal, a constellation distortion compensation unit that compensates for constellation distortion of the multi-level modulation included in the digital signal in which an influence of dispersion is compensated for by the compensation unit, and an error correction decoding unit that performs error correction of the digital signal in which the constellation distortion is compensated for.

Claim (Index 9):
The coherent optical reception device according to  claim 8 ,\n wherein the IQ crosstalk compensation unit includes:\n a first provisional decision circuit that temporarily decides the signal of the in-phase component of the digital signal and extracts an in-phase modulation data component; \n a first coefficient multiplication circuit that calculates the amount of leakage of the in-phase component to the signal of the quadrature phase component in the digital signal on the basis of the in-phase modulation data component; \n a second provisional decision circuit that temporarily decides the signal of the quadrature phase component of the digital signal and extracts a quadrature phase modulation data component; \n a second coefficient multiplication circuit that calculates the amount of leakage of the quadrature phase component to the signal of the in-phase component in the digital signal on the basis of the quadrature phase modulation data component; \n a first subtraction circuit that subtracts an output value of the second coefficient multiplication circuit from the signal of the in-phase component signal of the digital signal; and \n a second subtraction circuit that subtracts an output value of the first coefficient multiplication circuit from the signal of the quadrature phase component signal of the digital signal.

Metadata:
- Claim Count in Document: 23.0
- Percentile: 86.0
- Lexical Diversity: 2.44444
- Patent Class: 398.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16094857', '11221921', '12668626', '13913771', '14114537']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.724975797636111
- 35 USC 102 Novelty (BERT): 0.538008630961573
- Combined Prediction Score: 0.7062790809686572
- Mean Citation Score: 288.27392999999995
- Max Citation Score: 334.0272
- Similarity Product: 273.2909383649826

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test