Wikipedia
MVDDS (Multichannel Video and Data Distribution Service) is a type of television and Internet delivery technology licensed for use in the United States by the Federal Communications Commission (FCC). This was subsequently tested by The MITRE Corporation for the FCC. A report was filed in the 98-206 Docket before the FCC.
This terrestrial based wireless transmission method reuses Direct Broadcast Satellite (DBS) frequencies for distribution of multichannel video and data over large distances.
The spectrum is in the 12.2 - 12.7 GHz range, offering fast downloads but requiring other frequencies for uploads. It is seen as a potential competitor to cable for delivery of triple play or triple-threat services (voice, data, video).