Editing Orthogonal frequency-division multiplexing (section)

====Digital radio====
<!-- This section is linked from [[Digital Audio Broadcasting]] -->
COFDM is also used for other radio standards, for [[Digital Audio Broadcasting]] (DAB), the standard for digital audio broadcasting at [[VHF]] frequencies, for [[Digital Radio Mondiale]] (DRM), the standard for digital broadcasting at [[shortwave]] and [[medium wave]] frequencies (below 30&nbsp;MHz) and for [[Digital Radio Mondiale#DRM Plus|DRM+]] a more recently introduced standard for digital audio broadcasting at [[VHF]] frequencies. (30 to 174&nbsp;MHz)

The United States again uses an alternate standard, a proprietary system developed by [[iBiquity]] dubbed ''[[HD Radio]]''. However, it uses COFDM as the underlying broadcast technology to add digital audio to AM (medium wave) and FM broadcasts.

Both Digital Radio Mondiale and HD Radio are classified as [[in-band on-channel]] systems, unlike Eureka 147 (DAB: [[Digital Audio Broadcasting]]) which uses separate VHF or [[Ultra high frequency|UHF]] frequency bands instead.