Here we see HD Radio sidebands on either side of an analogue FM broadcast signal, as shown on a spectrum analyzer.
by Kevin Strom, WB4AIO
WITH 2010 APPROACHING, CNET just released its “The Decade’s 30 Biggest Tech Flops” anti-awards, and “HD Radio” was among the “winners.”
HD Radio was not only doomed from the start, it was such a serious blunder that it may well lead to the death of thousands of radio stations and the permanent stunting of the industry itself.
There is nothing wrong with the concept of digital radio.
Using modern firmware-upgradeable codecs, orthogonal FDM transmission, and a network of community transmitters in a dedicated digital band, great things could have been done: