PATENT CLAIM ANALYSIS

Application Number: 16022573
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-10
Patent Classification: ["398", "208000"]

Abstract:
Apparatus and method for digital signal constellation transformation are provided herein. In certain configurations, an integrated circuit includes an analog front-end that converts an analog signal vector representing an optical signal into a digital signal vector, and a digital signal processing circuit that processes the digital signal vector to recover data from the optical signal. The digital signal processing circuit generates signal data representing a signal constellation of the digital signal vector. The digital signal processing circuit includes an adaptive gain equalizer that compensates the signal data for distortion of the signal constellation arising from biasing errors of optical modulators used to transmit the optical signal.

Claim (Index 19):
A method of operating an optical communication system, the method comprising:\n providing, by an optical transmitter configured, optical transmissions over an optical network; receiving, by an optical receiver, an optical signal from the optical network; generating, by the optical receiver, an analog signal vector representing the optical signal; converting, an analog front-end of a transceiver coupled to the optical transmitter and the optical receiver, the analog signal vector into a digital signal vector, wherein the digital signal vector comprises a digital representation of an in-phase (I) component and a quadrature-phase (Q) component of the optical signal; and generating, by a digital signal processing circuit of the transceiver, signal data representing a signal constellation of the digital signal vector; wherein generating the signal data comprises\n generating, by an adaptive gain equalizer of the digital signal processing circuit, transformed signal data by compensating the signal data for distortion of the signal constellation, \n generating, by the adaptive gain equalizer, an estimate of an angular tilt of the signal constellation, and \n compensating, by the adaptive gain equalizer, the signal data based on the estimate of the angular tilt; \n wherein generating the estimate of the angular tilt comprises generating, by the adaptive gain equalizer, the angular tilt based on a sum of a plurality of cross-correlations of I and Q components of the signal constellation; \n wherein the sum of the plurality of cross-correlations is computed over a moving window of data samples obtained from the digital signal vector; \n wherein the optical signal comprises a multi-level quadrature amplitude modulation (QAM) signal, a discrete multi-toned (DMT) modulation signal, an orthogonal frequency division multiplexing (OFDM), or a phase-shift keying (PSK) signal.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 94.0
- Lexical Diversity: 2.24
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15820304', '15130778', '15256210', '15256173', '15525670']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6951038555292498
- 35 USC 102 Novelty (BERT): 0.5877475371976367
- Combined Prediction Score: 0.6843682236960885
- Mean Citation Score: 319.402572
- Max Citation Score: 454.0741
- Similarity Product: 438.0346673709631

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