Extension of wireless local area network communication system to accommodate higher data rates while preserving legacy receiver features
US6882679B2 · kind B2 · utility
14Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Jun 1, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/205
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a direct sequence spread spectrum data communication system an information bit is mixed with a pseudorandom noise or spreading code to produce modulated codeword for transmission. A method of bandwidth efficient M-ary phase shift key modulation encoding at least 16 bits of data to a single codeword is disclosed for extending the data rate of a spread spectrum system. Interoperability with legacy devices is maximized by maintaining structural similarity between the modulated waveforms of the extended data rate and legacy systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.