CTIA Field Test Finds 6 GHz Interference Concerns
A field test by CTIA and Southern Co. found interference is an issue for unlicensed low-power indoor and very-low-power outdoor use of the 6 GHz band, CTIA said in an FCC filing posted Monday in docket 18-295. The test focused…
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on a 6 GHz link between Fortson and Columbus, Georgia. Because commercial devices aren’t available, “the testing emulated unlicensed devices by using a vector signal generator, with programmable power levels, modulation, channel size, and duty cycle to replicate the expected radio transmissions of an unlicensed 6 GHz device,” CTIA said: The tests found a device can “reduce the microwave link fade margin by a considerable amount, by 3 to 4 dB in indoor tests, and 5 to 11 dB outdoors.” Commissioners could take up a further 6 GHz order in December (see 2011130045).