Optimal Transmission Technique for DAB+ Operating in the SFN Network

The article presents the issue of signal transmission in the Single Frequency Network SFN network that supports Digital Audio Broadcasting DAB+ digital radio. In the SFN network, the most important issue is the synchronization of transmitters, which is why it is necessary to ensure a stable connection between the multiplexer and the modulator. The paper proposes the use of the optimal, from the SFN point of view, transmission link, and also presents the results of using the Long Term Evolution LTE system as a transmission link that does not meet the requirements of the SFN network. For the proposed solution based on a radio-line, the results of measurements of delay and transmission speed were presented. Also measurements of signal delays in the real SFN network were presented, in which various methods of signal transmission between the multiplexer and transmitters were used.