Method and apparatus to compensate for differential attenuation in an optical time slot interchanger
US5572350A · kind A · utility
14Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0001
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Look-ahead control techniques and a variable attenuator are used to solve the known problem of differential attenuation of photonic intensities between time slots are delayed differently in delay paths that have different losses which optical time slot interchangers have. The result of the look-ahead control techniques and variable attenuator is a data frame in which the widely varying photonic intensities are equalized to a substantially similar level, thereby greatly reducing the bit error rate of the downstream receiver/demodulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.