13 November 2020

OFDM 17-tone PSK4 62.5 Bd, "struna" HF (струна)

Heard on 10994.0/USB (10995.5 CF) starting from 1020Z on Twente WebSDR. That "Struna" HF waveform consists of OFDM 17-tone modulation using PSK4 at 62.5 Bd, tones are 62.5 Hz spaced. Struna transmissions take place on a pool of frequencies at .10, .20 and. 30 minutes every hour. Thanks to cryptomaster for the tip and radiotehnikaT101 for warning about the on-air signal presence.



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