Similarities Between Greece and Brazil Regarding Digital AM

I need to mention Greece as an example of a country that differs from ours, but which may arrive at the same solution—despite its specific conditions—even while located in a continent dominated by the DAB digital system.

My name is Ricardo Gurgel. I am an engineer currently engaged in a series of analyses of digital radio systems that could serve as our local option. For this purpose, I’ve been looking into what is happening in other countries, observing both progress and setbacks, and seeking authentic answers to many of the questions raised in this debate.

Greece, like Brazil, is in a stalled situation regarding DAB, and also has a virtually empty AM band. This European country could therefore lean toward adopting the DRM standard instead of the dominant European DAB. While there are significant differences—such as territory size, economic context, and especially cultural distinctions—between Brazil and Greece, both have experienced a hollowing out of the AM band, particularly following major economic crises. This vacuum creates favorable conditions for digital standards designed for AM operation. As such, this factor may drive Greece toward viewing DRM as a viable solution.

One key difference is that, while Brazil is a continental country with a clear reduction in AM use, Greece must deal with AM broadcasters from neighboring countries. In such a scenario, AM band management is not solely a matter of national discretion. Cross-border coordination is essential to avoid interference—a challenge that must be taken seriously. Communication has always been a matter of national security; it educates, influences, and shapes public behavior. No country wants its communications infrastructure disrupted by external interference.

That said, this issue doesn’t exclude Greece from deploying broadcasters with various levels of reach. A distribution model involving time-based power variation could be adopted. Some stations with greater range could operate under special licenses, while local broadcasters could reduce their power—particularly during nighttime hours.

Power Adjustment by Time Slot

The fact that much of the AM band in Greece is vacant opens the door for new digital occupation of the dial. Even though nearby countries still operate many analog AM stations, relatively simple technical adjustments could enable Greece to adopt a digital AM system.

One key adjustment would be time-based power variation. For many stations, this would mean reducing power at night—ideally without compromising coverage—by leveraging the propagation characteristics of the AM band after dark. This would require precise technical management, with licenses specifying detailed tables for seasonal and hourly power reductions and increases.

Yes, the system may be different. But AM still offers the incredible ability to reach greater distances at night, making it an appealing option for reviving this foundational form of communication.