17 September 2015

logs

14259.0 --- Russian Mil, RUS 0710 USB OFDM 60-tone modem 30Bd 44.4Hz π/4 DQPSK (17Sep15)
14633.1 --- Russian Mil, RUS 0818 cf MFSK-68 (34+34) (16Sep15)
14547.0 --- Russian Mil, RUS 0815 USB OFDM 60-tone modem 35.5Bd 44.4Hz π/8 DPSK-8 (16Sep15)
08016.0 NPRDPZ Nat. Protection and Rescue Directorate, HRV 1359 USB MIL 188-141 ALE TWS (15Sep15)
16103.0 --- Russian Mil, RUS 1320 USB OFDM 45-tone HDR modem 33.33Bd 62.5Hz DBPSK (15Sep15)
09098.6 FUG French Navy La Regine, F 1336 USB STANAG-4285 1200/S encrypted (14Sep15)
09270.8 --- French MIL Favières via Vernon, F 1308 USB ARQ-E 184.6Bd/850 no traffic (14Sep15)



during the last days, starting atbout 0700z, around 14200 KHz and 14500 KHz on USB was possible to hear OFDM 60-tone modems (aka CIS-60) running at the same time and in different frequencies, i.e. 14233.0, 14259.0 and 14285.0 KHz, and some other interesting signals as the MFSK-68 reported above in the log. The CIS-60 signals belong to the two known waveforms: 35.5 Bd π/8 DPSK-8 and 30Bd π/4 DQPSK (same channel separation,  44.44 Hz). You can also hear op. chats and sometimes quite long CIS-60 sessions consisting of not-modulated carriers followed by modulated carriers but w/out input data (idling). About the "parallel" emissions, I do not know if we face different transmission sites or different beamings/power, anyway, given that fading is not in all the CIS-60 frequencies, it's my guess that these should not be harmonics but just separate transmissions.

MFSK-68 (34+34) - constellation of the embedded PSK bursts
CIS-60 modem 30Bd π/4 DQPSK
op.chat and CIS-60 start

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