PATENT CLAIM ANALYSIS

Application Number: 15966697
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-10
Patent Classification: ["398", "208000"]

Abstract:
A coherent optical receiver in which the channel equalizer and the clock-recovery circuit are connected in a nested-loop configuration, wherein the channel estimate generated by the equalizer is used to adjust the phase of the clock signal generated by the clock-recovery circuit. The channel equalizer can be implemented using a bank of time-domain or frequency-domain FIR filters. In an example embodiment, the clock-recovery circuit is configured to track the phase rotation corresponding to the equalized signals in a frequency-dependent manner; track the phase rotation in the channel equalizer either in a frequency-dependent manner or based on the mean signal delay therein; and adjust the phase of the clock signal based on an effective difference between these two phase rotations. The clock-recovery circuit enhances the clock tone by applying a Fourier transform to the squared absolute values of the equalized signals outputted by the channel equalizer.

Claim (Index 9):
The apparatus of  claim 1 , wherein the digital equalizing filter is configured to generate the control signal such that the plurality of values includes two or more sets of complex values, each set representing a respective matrix element of the transfer function as a function of frequency.

Metadata:
- Claim Count in Document: 42.0
- Percentile: 91.0
- Lexical Diversity: 2.01316
- Patent Class: 398.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14319866', '14500239', '15376319', '15376337', '15376361']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6572494892625519
- 35 USC 102 Novelty (BERT): 0.5085325369199437
- Combined Prediction Score: 0.6423777940282911
- Mean Citation Score: 202.845026
- Max Citation Score: 208.35687
- Similarity Product: 157.45222994646548

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