diario SWL I-56578 Antonio

The transmission has been spotted by ANgazu on 4102.0 KHz/USB by using a remote Kiwi SDR in Sweden. The signals consists of 4500 msec burs...

the so-called CIS-20, in its standard format, is an OFDM 20-tone waveform characterised by π/4-DQPSK modulation at 75 symbols per sec...

The main features of the waveform, as reported in radioscanner.ru , are: k = 3/5, 20 channels + 1 pilot, channel modulation pi/4 DQPSK,...