Use of Spectrum Bands Above 24 GHz for Mobile Radio Services

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In this document, a Fourth Notice of Proposed Rulemaking (4th FNPRM) invites members of the public to comment on how best to transition existing spectrum holdings in the 39 GHz band to the new flexible-use band plan, and on using an incentive auction mechanism. The Federal Communications Commission (Commission or FCC) proposes to modify the 39 GHz, Upper 37 GHz, and 47 GHz band plans from 200 megahertz to 100 megahertz channels to facilitate the auctioning of all three bands at the same time. The Commission also proposes an incentive auction to reduce encumbrances and create contiguous blocks of spectrum through the 39 GHz and Upper 37 GHz bands. These proposals will promote the efficient use of this spectrum by incumbents and new licensees.