Atmospheric Ducting Interference on DAB, DAB+ Radio in Eastern Mediterranean

DIGITAL RADIO -- The Eureka 147 DAB System

Flexibility and choice -The DAB signal is essentially a highly flexible over-air 'data-pipe' that can broadcast a wide range of service types, from purely audio-based to multimedia. Typically, each multiplex can broadcast five or more high-quality audio services plus a number of extra services. The multiplex can be dynamically reconfigured to introduce additional services, temporary or permanen...

DAB Eureka-147: a European vision for digital radio

NULL DETECTION IN DAB, T-DMB, AND DAB-IP SYSTEMS - Patent application

Detecting Null symbols in a video data frame comprises sending OFDM symbols through a sliding windowed correlation process having a correlation window length proportional to a cyclic prefix length and a delay equal to a FFT size of the symbols, wherein output peaks of the process occur where two similar portions of the symbols coincide; checking peaks in windows sized equal to a duration of a s...

Audio Quality on the Air in Dab Digital Radio in Norway

The same program heard on DAB at 128 kbit/s and 192 kbit/s has been compared with a high quality FM stereo signal. The result from informal listening tests is that there are audible impairments in the stereo imaging of high-frequency instruments, and in particular hi-hats at 128 kbit/s. Some examples of songs where this effect can be heard are given. The effect can be explained by spectral anal...

DRM+, a perfect complement to DAB/DAB+ in VHF band III

Technical investigations suggest that DRM+ is a suitable candidate for the transition from analogue FM to digital broadcasting in VHF band II (87.5 108.0 MHz) in Europe [2]. Unfortunately, there are mainly three major problems to solve: 1. VHF band II is historically defined for the use of analogue FM sound broadcasting, and, it is – as such – extensively used in Europe; 2. the lack of agreed c...