Estimating frequency offset to demodulate a packet of phase-modulated symbols
US6522703B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2332
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method of estimating the frequency offset of a packet of phase modulated symbols received with phase error, the method comprising:applying a phase correction to the symbols of the received packet for all possible pairs of frequency offset and phase offset; andselecting from said offset pairs, the pair which provides the most likely packet of corrected symbols, thereby determining the frequency offset of the received packet.Compared with known solutions, the invention makes it possible to reduce errors concerning estimated frequency. Advantageously, the method comprises a step of quantizing the possible phase corrections, thereby making it possible to reduce the complexity of the calculations to be performed, without degrading performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.