Simplified finite impulse response (FIR) digital filter for direct sequencespread spectrum communication
US6570907B1 · kind B1 · utility
7Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1999 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Oct 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0607
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of time-reversal symmetry of the responses. Moreover, the disclosed signal generator supports up-ramping and down-ramping for smooth transmission of spread spectrum modulated signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.