Digital radio mondiale receiver integer carrier frequency offset estimation
US8270503B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2008 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jul 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2684
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for estimating a carrier frequency offset (CFO) in a Digital Radio Mondiale receiver is provided. Orthogonal frequency-division multiplexing (OFDM) demodulation is performed on a received DRM signal to produce OFDM symbols. A cell characteristic in corresponding cells in the OFDM symbols is compared and a carrier index of a frequency pilot cell in the cells is identified based upon the compared cell characteristic. The CFO is estimated based on the identified carrier index of the frequency pilot cell. The ratio of values of the cell characteristic in corresponding cells may be calculated and the frequency pilot cell identified by identifying cells for which the cell characteristic is most nearly equal. The CFO may be estimated by comparing the identified carrier index with an expected carrier index of a frequency pilot cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.