PATENT CLAIM ANALYSIS

Application Number: 16153341
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["398", "208000"]

Abstract:
A method and structure for tap centering in a coherent optical receiver device. The center of gravity (CG) of the filter coefficients can be used to evaluate a proper convergence of a time-domain adaptive equalizer. However, the computation of CG in a dual-polarization optical coherent receiver is difficult when a frequency domain (FD) adaptive equalizer is adopted. In this case, the implementation of several inverse fast-Fourier transform (IFFT) stages is required to back time domain impulse response. Here, examples of the present invention estimate CG directly from the FD equalizer taps and compensate for an error of convergence based off of the estimated CG. This estimation method and associated device architecture is able to achieve an excellent tradeoff between accuracy and complexity.

Claim (Index 17):
A coherent optical receiver device, the device comprising:\n an input signal; a chromatic dispersion (CD) equalizer module being configured to compensate for CD affecting the input signal; a polarization mode dispersion (PMD) equalizer module coupled to the CD equalizer and a least means square (LMS) module, the PMD equalizer module being configured to compensate for PMD affecting the input signal following compensation by the CD equalizer module, the PMD equalizer module having a plurality of PMD taps; an evaluation module coupled to the PMD equalizer module, the evaluation module being configured to synchronize the input signal and to iteratively adjust a determinant of a frequency-domain (FD) coefficient-based matrix to minimize an error of convergence; and wherein the LMS module is coupled to the evaluation module, the CD equalizer module, and the PMD equalizer module, the LMS module being configured to filter the input signal.

Metadata:
- Claim Count in Document: 74.0
- Percentile: 97.0
- Lexical Diversity: 1.61176
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15792582', '15792396', '16134722', '15792416', '10997442']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6683002306584334
- 35 USC 102 Novelty (BERT): 0.636232564884014
- Combined Prediction Score: 0.6650934640809915
- Mean Citation Score: 375.098438
- Max Citation Score: 548.48047
- Similarity Product: 528.286468282352

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