Matched filter for scalable spread spectrum communications systems
US7092426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Jun 5, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A spread spectrum communications system uses long, scalable PN sequences to achieve variable communication rates. A low-complexity and scalable matched filter architecture is used to provide a large processing gain and robust recovery of multiple devices in long reach, high ambient-noise environments. The spread spectrum communications system includes a transmitter and a receiver. The receiver includes an RF receiver and a first matched filter receiving data from the RF receiver. A plurality of phase/frequency shifters receives a signal from the first matched filter. A plurality of second matched filters receive data from the plurality of phase/frequency shifters. An equalizer/decoder receives signals from the plurality of phase/frequency shifters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.