Method and apparatus for the modulation of spread spectrum radio signals
US5157686A · kind A · utility
201Cited by
66References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jun 24, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/70757
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A spread spectrum receiver with filters matched to transmitter chip codes are implemented in digital circuits along with a digital circuit for acquisition and tracking of the arrival times of the chip codes. The digital circuit implementations are used for the noncoherent demodulation of pulse position spread spectrum modulation signals where the pulse is a carrier modulator by a chip code and for the noncoherent demodulation of multiple chip code modulation signals where each information symbol is represented by one of several chip codes modulating a carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.