Optical CDMA transmitting apparatus and method for transmitting bipolar data
US7308199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2003 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Jul 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Provided is an optical Code Division Multiple Access (CDMA) transmitting apparatus and method for transmitting bipolar data in an optical CDMA system. The optical CDMA transmitting apparatus and method of the present research has a simple structure, including only one optical CDMA encoder and one optical modulator. This technology minimizes multiple access interference by using modified pseudo-noise code in the encoding process, thus improving the optical CDMA transmission performance. The optical CDMA transmitting apparatus includes: an optical CDMA encoding means for encoding lights from the outside into a code or a complement code of the code; and an optical modulation means for transmitting the code or the complement code of the code which is selected in the optical CDMA encoding means based on the polarity (either ‘0’ or ‘1’) of the data inputted from the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.