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The Fraunhofer Institute for Integrated Circuits (IIS) has developed a new software-defined DAB+ digital radio solution for automotive application. Its update to its DAB+ software library involves ‘spur suppression’ technology which improves radio reception, enhances the reception sensitivity of radio receivers, extends the range of coverage for broadcasters, and increases the number of channels vehicles can receive.

The Fraunhofer IIS software library is said to serve as a baseband decoder for DAB+ signals, enabling the implementation of DAB+ in radio systems. It is available as C- or object code, is compatible with other IIS audio and data decoding components, and is optimized for automotive radio platforms.

The spur suppression technique acts against interference and signal disruption, often a problem in newer vehicles with complex open- and closed-loop electronic control systems – and in electric vehicles in particular. Martin Speitel, group manager for infotainment, Fraunhofer IIS, explained in a statement: “Thanks to improved baseband processing algorithms, the solution offers dynamic resistance to interference. Using a method developed specially for the purpose, the upgraded version of our DAB+ software library automatically suppresses any sporadic narrowband interference. Electronic vehicle components can generate interfering signals of this nature.”

As well as supporting a wider selection of stations transmitting over greater distances, the upgrade further includes an emergency warning facility: the radio receivers automatically switch to emergency broadcasts or wake up from standby mode in the event of a natural disaster or crisis, for example, and multilingual text information can be received.

Frauenhofer IIS points out that its DAB Receiver Kit has a flexible data interface which can be easily combined with external applications, and an API which can be adapted to a client’s framework.

-Farah Alkhalisi