PATENT CLAIM ANALYSIS

Application Number: 16066854
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-01
Patent Classification: ["398", "025000"]

Abstract:
In order to increase a compensation range for Doppler shift compensation, this digital signal processing circuit is provided with a Doppler shift compensation unit which, on the basis of a sample sequence signal which is oversampled at N (where N is an integer at least equal to 2) times a symbol rate and includes a central sample corresponding to the timing at a symbol center, and a transition sample corresponding to the timing of a symbol transition, finds a Doppler shift amount included in the sample sequence signal and performs Doppler shift compensation. The Doppler shift compensation unit includes a symbol determining unit which performs a symbol determination with respect to the central sample and a determination with respect to the transition sample. The Doppler shift compensation unit switches between these determinations for each corresponding sample and performs said determinations in order to obtain a phase difference and thereby detect the Doppler shift amount.

Claim (Index 1):
A digital signal processing circuit to decode an optical signal detected by coherent detection, the circuit comprising:\n a Doppler shift compensation circuit configured to perform Doppler shift compensation by, based on a sampling sequence signal oversampled at N times a symbol rate (N is an integer not smaller than 2) and including a center sample corresponding to a timing of a symbol center and a transition sample corresponding to a timing of a symbol transition, calculate a Doppler shift amount included in the sampling sequence signal, wherein the Doppler shift compensation circuit includes a symbol decision circuit configured to perform a symbol decision with respect to the center sample and a symbol decision with respect to the transition sample and detects a Doppler shift amount by performing decisions while switching between the decisions for each corresponding sample and by calculating a phase error.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 94.0
- Lexical Diversity: 2.36232
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13808488', '11612426', '15390385', '11853106', '14073391']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6391553589816606
- 35 USC 102 Novelty (BERT): 0.5110678563399582
- Combined Prediction Score: 0.6263466087174905
- Mean Citation Score: 222.782224
- Max Citation Score: 231.51863
- Similarity Product: 179.4948818901527

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