Methods and apparatus for improving minimum hamming weights of a sequence
US7312727B1 · kind B1 · utility
55Cited by
18References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2007 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Apr 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A communications channel comprises a seed selector that selectively removes X M-bit symbols of user data from a seed set comprising Y M-bit symbols and that selects a scrambling seed from Y-X symbols remaining in the seed set, where X, Y and M are integers greater than one. A Hamming weight coding device that determines a Hamming weight of symbols of scrambled user data that are generated based on the user data and the selected scrambling seed and that selectively codes the symbols depending upon the determined Hamming weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.