EPRI Explains Challenges to 6 GHz Frequency Coordination Trials
The Electric Power Research Institute briefed the FCC about the analysis it used that led to file challenges to various public trials of 6 GHz automated frequency coordination (AFC) systems (see 2312220043). EPRI submitted test vectors consisting of locations along…
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fixed-service system centerlines "with line of sight to an FS receive station,” said a filing posted Friday in docket 21-352. “The AFC operator response for each test vector was compared to a free space path loss (FSPL) calculation,” EPRI said: “Locations where it was found that the AFC operator assigned co-channel maximum power spectral density (PSD) was more than 3 dB in excess of the maximum PSD based on the FSPL calculation were included in the challenge letter.” EPRI understands the metrics it used were different from those the FCC specified, the filing said.