Method and apparatus for SNR measurement
US6480315B1 · kind B1 · utility
9Cited by
7References
43Claims
0Family size
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Key dates
| Filing date | Aug 6, 1999 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Aug 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/69
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for monitoring the signal to noise ratio (SNR) of a noisy data signal in an optical communication system. In a receiver, input of a noisy data signal to a limiting amplifier results in a regenerated data signal. The regenerated data signal is compared to the noisy data signal and the difference signal is assumed to be, for the most part, noise. A measure of the amplitude of the regenerated data signal is divided by a measure of the energy of the difference signal to result in an indication of the SNR of the noisy data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.