PATENT CLAIM ANALYSIS

Application Number: 16287920
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["398", "183000"]

Abstract:
Embodiments of the present disclosure disclose a signal modulation and demodulation method and system, and an apparatus, to eliminate SSBI generated in a modulation and demodulation method. The method includes: performing, by a transmit end, PAM encoding on an input signal to obtain a PAM signal; electrically modulating, by the transmit end, the PAM signal by using a first filter; converting, by the transmit end, the electrically modulated PAM signal into an analog signal; optically modulating, by the transmit end, the analog signal by using an electro-optic modulator to obtain an optical signal, and sending the optical signal. Another method includes receiving, by a receive end, the optical signal, and converting the optical signal into an electrical signal; electrically demodulating, by the receive end, the electrical signal by using a second filter; and performing PAM decoding, by the receive end, the electrically demodulated electrical signal to obtain a restored input signal.

Claim (Index 6):
A signal modulation apparatus, applied to an intensity-modulation and direct-detection (IMDD) system, the apparatus comprising:\n a pulse amplitude modulation (PAM) encoder configured to perform PAM encoding on an input signal to obtain a PAM signal; a first filter configured to electrically modulate the PAM signal; a digital-to-analog converter (DAC) configured to convert the electrically modulated PAM signal into an analog signal; and an electro-optic modulator configured to:\n optically modulate the analog signal to obtain an optical signal, wherein a bias voltage of the electro-optic modulator is M+V pi , V pi  is a variation value of the bias voltage in any cycle of a modulation curve of the electro-optic modulator when an output optical power of the electro-optic modulator varies from a maximum value to a minimum value or varies from a minimum value to a maximum value, the modulation curve is a curve corresponding to a function whose independent variable is the bias voltage and dependent variable is the output optical power, and M is a value of the bias voltage when the output optical power is the largest, and \n send the optical signal.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 99.0
- Lexical Diversity: 3.06897
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15060318', '14983869', '15675780', '14706908', '15072866']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6704784990985946
- 35 USC 102 Novelty (BERT): 0.4877442381068501
- Combined Prediction Score: 0.6522050729994201
- Mean Citation Score: 203.817322
- Max Citation Score: 222.53639
- Similarity Product: 199.11030957330289

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

Dataset: test