Method for demodulating the signal of multiple-position frequency manipulation with equidistant frequency spreading, demodulator for this signal, and computer-readable medium
US7903765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Sep 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/007
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention relates to signal transmitting engineering. The use of the inventive method demodulation of a signal of multiple position frequency manipulation with equidistant frequency spreading allows to reduce the threshold of demodulation and to ensure a quality of demodulation, which is at least identical to that of a quasi-optimal demodulator. To obtain such a result, a frequency grid is formed with a possibility of precise tuning of frequency spreading; during the reception, values having a maximum module of reception signal are extracted at all frequencies switchable values at clock frequency, this clock frequency is extracted from maximum of the received signals and is used for a precise tuning of the frequency spreading; a grid of tunable frequency is tuned with a precisely tuned frequency spreading for exact values of a frequency of received signal, and demodulation is effected by the way of coherent reception of the received signal, using only one from quadrature signals to decide whether a signal of a determined frequency is absent or present among the mentioned exact values of frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.