OTI Pushing for Technical Changes to TVWS Rules
The Open Technology Institute at New America is disappointed the FCC didn’t propose to “authorize or require” white space databases to utilize terrain-based propagation models, such as the Longley-Rice irregular terrain model, to “take account of real-world terrain and clutter…
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in the local area where operators request use,” the group told an aide to Commissioner Brendan Carr. OTI supports authorizing fixed devices to use channels immediately adjacent to TV operations, provided they maintain 3 MHz separation from the adjacent TV channel, said a filing posted Tuesday in docket 20-36: “Extensive field tests and laboratory measurements by Microsoft have demonstrated that three megahertz of separation between a fixed [white spaces] signal and a TV broadcast channel is sufficient to avoid harmful interference to TV viewers at power levels even greater than 100 milliwatts.”