Systems and methods for concatenation in spread spectrum systems
US7873097B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Aug 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiver despreads a spread spectrum sequence by partially despreading the spread spectrum sequence using an outer spreading code, and then despreading the partially despread sequence using an inner spreading code. This can advantageously save processing power. In one embodiment, the outer spreading code is despread with an analog circuit, and an inner spreading code is despread with a digital circuit. A modulator for a transmitter can generate a spread spectrum sequence by direct-sequence spreading data to generate a partially spread sequence and then spreading the partially spread sequence to generate the spread spectrum sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.