Jousting Continues Over Higher Ground Earth Station Authorization

Higher Ground (HG) doesn't understand possible interference issues arising from its planned satellite earth station network for various broadband applications, with its "deficiencies in the relevant physics and engineering" putting fixed services (FS) at risk, said the Fixed Wireless Communications Coalition in an FCC International Bureau filing Tuesday. FWCC said HG's promise to comply with out-of-band emissions limits -- in response to concerns raised about adjacent channel interference -- is "troubling" since those are different problems. The coalition said HG assertions that low signal strength and small likelihood of proximity to an FS station means low risk of adjacent channel interference have no analysis to back them up. It said HG shows deficient technical understanding when it tries to argue there won't be interference from unwanted reflections in the environment. The filing responded to an HG ex parte filing earlier this month on meetings between CEO Rob Reis and International, Wireless, Public Safety and Homeland Security bureau and Office of Engineering & Technology representatives about FCC authorization of its earth stations and the subsequent opposition (see 1702100055). The firm argued the earth station transmit power levels will be a hundredth of point-to-point microwave stations' and that its software will let an earth station transmit only if its emissions are at least 6 dB below thermal noise at an FS receiver in line of sight. The Tri-State Generation and Transmission Association in filings Monday (see here, here and here) said it opposed HG's use of 5925-6425 MHz band, which it said could interfere with 6 GHz microwave paths. HG outside counsel Adam Krinsky of Wilkinson Barker -- echoing language in HG's consolidated opposition to the applications for review filed by FWCC, Enterprise Wireless Alliance, Utilities Technology Council and APCO -- emailed us Tuesday that the FCC, after more than 18 months of dialogue with the company and numerous demonstrations, concluded its interference protection regime "provides necessary safeguards against harmful interference and granted Higher Ground’s application. The applications for review are based on ‘what if’ speculation, they don’t provide any technical analysis or support, and they disregard the Order’s finding.” FWCC in a reply Tuesday said the only proof HG's system will prevent interference comes from the firm's statements. With no one ever before having done unilateral coordination of mobile transmitters among fixed receivers, "the stakes here warrant the Commission asking for more in the way of assurance than a further repetition of HG's own claims," FWCC said.