Receiver for frequency hopped signals
US4843638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/713
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiver for frequency hopped signal on which an information signal is modulated on one of a plurality of equally frequency spaced carrier signals. A mixer receives the frequency hopped signals on one input, and on a second input, a local oscillator signal have a comb spectrum. The local oscillator signal is generated by a short pseudo-random bit sequence generator providing the continuous comb spectrum with a frequency spacing equal to the spacing of the carrier frequency signals. A plurality of auxiliary signals are generated having a frequency spacing equal to the carrier frequency signal spacings. The auxiliary signals will have the same frequency and spacing from each other for all carrier frequency signals. The modulator means can be used to separate one of the frequency constant auxiliary signals which includes modulation produced from any one of the plurality of carrier signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.