Transmission system for digital audio broadcasting
US5828954A · kind A · utility
21Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Apr 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital audio broadcasting (DAB) system includes a radio-frequency (RF) transmitter and a corresponding RF receiver. The RF transmitter transmits an RF DAB signal that includes a pilot signal at 250 Khz. An RF section of the RF receiver includes a phase-lock-loop (PLL) to compensate for any carrier frequency differences in the received RF DAB signal. This PLL tracks the phase of the received RF DAB signal when an amplitude of a recovered IF signal is above a predetermined threshold and upon detection of the pilot signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.