Globalstar TLPS Revisions Still Need Clarifying, HIA Says

Globalstar needs to clarify the protocol and operating parameters of its revised terrestrial low power service broadband proposal to make more clear what kind of interference problems it poses for unlicensed users of the 2.4 GHz band, said Hearing Industries Association (HIA) in a filing Wednesday in docket 13-213. Globalstar's original proposal involved IEEE 802.11 protocol technology, but its revision (see 1611100031) isn't clear on what technology would be employed, so it's impossible to say whether the out-of-band emission limits would be effective, HIA said. The group said it would back symmetrical OOBE limits that protect adjacent band operations on either side of Globalstar's spectrum. It said that of the company's OOBE proposals, its 43 dB OOBE requirement could be a problem for hearing aid receivers operating near the edge of Globalstar's range but is still the preferred route. HIA said if the satellite firm uses LTE technology with control signals, that could help assuage interference concerns since the control signals could be moved from adjacent band edges easily. Globalstar didn't comment Thursday.