Upsampling optical transmitter
US9166696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2014 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Aug 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus including a photodiode, a low pass filter, an analog-to-digital converter, an interpolation circuit and a digital signal processor is disclosed. The photodiode receives a portion of a plurality of optical signals, each of which is modulated in accordance with a corresponding one of a plurality of data streams, and each having a corresponding one of a plurality of wavelengths. The photodiode supplies an electrical output. The low-pass filter supplies a filtered output in response to the electrical output. The analog-to-digital converter is configured to sample the filtered output at a first sampling rate to generate a plurality of first data samples. The interpolation circuit is configured to receive the plurality of first data samples and supply a plurality of second data samples at a second sampling rate less the first sampling rate. The digital signal processor circuit is configured to receive the plurality of second data samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.