PATENT CLAIM ANALYSIS

Application Number: 16089180
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-04
Patent Classification: ["398", "065000"]

Abstract:
A frequency difference compensation unit ( 510 ) generates a carrier recovery signal by compensating for a frequency difference between a local light beam and an optical signal in a plurality of digital signals. A first symbol determination unit ( 521 ) determines the symbol position of the carrier recovery signal in which a frequency difference is compensated for, in accordance with the signal arrangement of multi-value modulation. A second symbol determination unit ( 522 ) determines the symbol position of the carrier recovery signal in which a frequency difference is compensated for, in accordance with a signal arrangement in which the number of multi-values of the multi-value modulation is reduced. A loop filter unit ( 540 ) and a compensation signal generation unit ( 550 ) temporarily generates a compensation signal using a determination result of the second symbol determination unit ( 522 ), and then regularly generates the compensation signal using a determination result of the first symbol determination unit ( 521 ).

Claim (Index 7):
An optical communication system comprising:\n an optical signal transmission apparatus that transmits an optical signal on which polarization multiplexing and multi-value modulation are performed; and an optical signal reception apparatus that processes the optical signal, wherein the optical signal reception apparatus includes an optical front end that generates a plurality of output light beams by causing the optical signal and a local light beam to interfere with each other, a signal conversion unit that generates a plurality of digital signals by photoelectrically converting and further analog-digital converting each of the plurality of output light beams, a frequency difference compensation unit that generates a carrier recovery signal by compensating for a frequency difference between the local light beam and the optical signal with respect to the plurality of digital signals, a first symbol determination unit that determines a symbol position of the carrier recovery signal in accordance with a signal arrangement of the multi-value modulation, a second symbol determination unit that determines the symbol position of the carrier recovery signal in accordance with a signal arrangement in which the number of multi-values of the multi-value modulation is reduced, and a compensation signal generation unit that generates a compensation signal in the frequency difference compensation unit, and the compensation signal generation unit temporarily generates the compensation signal using a determination result of the second symbol determination unit, and then regularly generates the compensation signal using a determination result of the first symbol determination unit.

Metadata:
- Claim Count in Document: 28.0
- Percentile: 97.0
- Lexical Diversity: 2.86667
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14350125', '15034282', '14766635', '11990807', '14758941']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6404018564114917
- 35 USC 102 Novelty (BERT): 0.5200133461122872
- Combined Prediction Score: 0.6283630053815713
- Mean Citation Score: 233.748176
- Max Citation Score: 268.12225
- Similarity Product: 217.9189268235416

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 0

Dataset: test