Out-of-band-emissions (OOBE) from ancillary terrestrial component (ATC) operations,...
Out-of-band-emissions (OOBE) from ancillary terrestrial component (ATC) operations, like the low-power terrestrial service proposed by Globalstar, could threaten unlicensed operation far below 2473 MHz, a wireless attorney said. The FCC proposes the same OOBE limits for ATC that it applies…
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to unlicensed device emissions below 2400 MHz, said Mitchell Lazarus of Fletcher Heald in a blog post (bit.ly/1gaENZ0). In practice, an ATC transmitter operating at the maximum allowable power can have OOBE limits “comparable to the in-band power typically used by mobile Wi-Fi devices,” he said. “The proposal to keep ATC frequencies separate from those used by Wi-Fi may not afford as much protection as Globalstar suggests.” The proposed technical rules is a creative effort on the FCC’s part, he said. “Rather than just open another band under MSS/ATC rules, the FCC is trying for a hybrid approach, requiring that ATC operate in the unlicensed band much like an unlicensed device.” The overall success of the commission’s approach in practice “will depend in large part on the power levels Globalstar chooses to deploy,” he said. Comments on the Globalstar NPRM are due May 5, replies June 4 (CD Feb 20 p19).