Digital Radio Mondiale (DRM) is the digital radio standard for the long-, medium- and short-wave ranges.The standard was formed by a consortium in co-operation with the International Telecommunication Union (ITU).
The system offers the radio stations and new service providers access to the multimedia age with small bit rates for large target areas and long distances.
The bandwidth of a DRM bandpass signal is less than 20 kHz and the number of carriers used in the OFDM-modulation is relatively small (max. 460).
These features motivate a real-time software implementation of a DRM-receiver on a conventional personal computer (PC) using the sound card as the input and output device.
A long, medium and short wave front-end with an intermediate frequency (IF) between 5 kHz and 15 kHz is used to receive the DRM signal. Any commercial front-end with an IF of 455 kHz should be usable by adding a 455 kHz to 12 kHz adaptor (assumed the receiver bandwidth is sufficient for a DRM signal).
Dream DRM implements a working software receiver with, at least, the basic features. Since this project was created at a university and the fundamental idea of such an institution is to teach and stimulate the creativity, this source-code is free under the GNU-General Public License (GPL).
Dream is a development project which uses the open source model to improve DRM technology. The main aim of this project is to implement and test new research results on an existing system, whereby the synchronization and channel estimation is of special interest.
What's New in This Release: [ read full changelog ]
· Fixed problem where users directories being cleared when clearing cache
· Fixed timezone problems with EPG
· Fixed problem when EPG is 4th service
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