Novel spread spectrum codec apparatus and method
US5081645A · kind A · utility
94Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Aug 6, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2013/0037
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system comprising apparatuses and methods for encoding and decoding spread spectrum signals is disclosed. Signals are encoded by modulating numerical sequences selected from an orthonormal basis of numerical sequences to provide channel coding. The modulated sequences are then combined to form an encoded signal. Because of the orthonormal character of the sequences, the encoded signal may be easily decoded using a matched filter. A method for generating long sequences from the product of shorter sequences is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.