Loading patent…
AssigneeInstitut Fur Rundfunktechnik GmbH
InventorsGeorg Plenge, Gunter Schneeberger
Estimating the term…
In order to permit and already occupied frequency spectrum to be utilized for the radio transmission of a data stream without interfering with the services already established there, a plurality of the RF carriers modulated with the data stream are either transmitted in the frequency gap between two adjacent frequency FM services at the same location or in the free frequency ranges at both sides of an FM service, while leaving out its rated frequency occupation. Compared to the level of the RF carrier of the adjacent frequency FM service or the FM service in the middle, the level of the plurality of RF carriers is selected to be sufficiently low in the sense of a signal to noise ratio that is sufficient for FM reception of the FM service or services. Moreover, the mentioned level is selected to be sufficiently high in the sense of noise immunity against locally remote FM services which fall into the frequency range or frequency gap intended for the transmission of the plurality of RF carriers. The data stream modulating the RF carriers is provided with increased error protection in the sense of providing sufficient noise immunity against the adjacent frequency FM service or services or the FM service or services in the middle.
A method for broadcasting a digitally coded stream of data containing information about one or a plurality of radio programs or other data, wherein the stream of data is distributed to a plurality of RF carriers, comprising the steps of
Dependencies are inferred from the claim text.