Transmitting RF signals employing improved high-level combinations of analog FM and digital signals
US7477700B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Dec 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Apparatus and method are presented for broadcasting an RF signal comprised of analog FM and digital signals. An analog FM source provides an analog FM signal. A digital source provides a digital signal. A splitter splits the FM signal into a fractional portion and remainder portion. A summer combines the fractional portion with the digital signal to provide a first combined signal. A main FM transmitter amplifies the remainder portion to provide an amplified FM signal. A digital transmitter amplifies the first combined signal to provide an amplified combined signal. A combiner combines the amplified FM signal and the amplified combined signal to provide a composite RF signal to be broadcasted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.