Digital audio broadcast receiver and tuning method thereof
US6438183B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2675
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital audio broadcast receiver is tuned by performing a sliding correlation on data demodulated from a phase reference symbol, correlating the demodulated data with known data at negative carrier numbers and, separately, with known data at positive numbers, thus obtaining a lower correlation coefficient and an upper correlation coefficient. The peak sum of these two correlation coefficients, as found in the sliding correlation, is recognized as valid if the two correlation coefficients do not differ greatly in magnitude, and do not differ greatly in phase angle. The tuning is adjusted only according to sliding shifts corresponding to valid peak sums, thereby avoiding frequency control errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.