High capacity spread spectrum optical communications system
US5867290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1996 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Nov 19, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparati for spatially encoding and decoding spread spectrum communication signals using broad band light sources are disclosed. The encoding algorithms involve the use of orthogonal spatial wavelets, which are preferably discrete attenuation functions of light from different sources so that the discrete attenuation function is imposed upon the spectrum of the light source. The function may be used either merely for providing an encoded channel or by providing a second mask that may be, for example, the complement of the discrete attenuation function so that the light beam is discrete with the first attenuation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.