Costas sequence time-frequency synchronization method based on all-phase spectrum correction
US11695600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2021 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Feb 2, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the field of digital signal processing, and in particular to a Costas sequence time-frequency joint synchronization method based on all-phase spectrum correction. The method improves the defects existing in a discrete frequency spectrum correction algorithm using short-time Fourier transform and sliding correlation. The improvement mainly comprises: the present disclosure provides a solution based on iterative optimization: when an actual frequency offset is an integral multiple of the spectral resolution, a large error can occur, frequency offset correction and time delay correction are carried out on a signal by using an estimated value having a large estimated error, then estimation is carried out again, and the frequency offset of the signal is not a special value by means of an iteration mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.