Signal processing apparatus for use in optical communication
US12224767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2023 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Jun 20, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/181
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A signal processing apparatus includes a plurality of time-interleaving digital-to-analog converters each configured to sample a digital input signal at a preset sub-DAC sample frequency, and to generate an analog sub-DAC output signal. The signal processing apparatus includes analog multiplexer that samples the plurality of sub-DAC output signals at a preset multiplexer clock frequency and generates a multiplexer output signal. The signal processing apparatus further includes a local ADC that receives the multiplexer output signal and generate a digital feedback signal. The signal processing apparatus further includes a digital compensation engine that receives the digital feedback signal from the local ADC and determine one or more distortion compensation parameters. The signal processing apparatus further includes a digital pre-processing stage that receives the one or more distortion compensation parameters from the digital compensation engine and performs distortion compensation pre-processing on the digital input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.