AT&T Seeks Waiver To Use Power Spectral Density Model in Two States
AT&T sought an FCC waiver to use a power spectral density (PSD) model instead of per-channel methods to measure effective radiated power for base stations "to more quickly and efficiently deploy high-speed wireless broadband services over Cellular spectrum" in areas…
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of Kentucky and Tennessee. An NPRM has proposed just that, the carrier noted in a petition posted Wednesday. Using PSD will let AT&T deploy LTE with more spectral efficiency, the company said. It seeks to operate at PSD levels of 250 watts per megahertz in nonrural areas and 500 watts in rural areas. Alternative limits using PSD "would update Cellular rules that currently favor narrowband emission systems and penalize wideband emission systems," the 2014 NPRM said. Current limits are for 500 watts a channel in nonrural and 1,000 in rural areas, a company spokesman said. In 2012, AT&T petitioned for a rule change for PSD, and since the rulemaking remains open the company now seeks license-specific waivers, it said.