Unknown 446

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Unknown 446
Unknown446 Waterfall.jpg
Frequencies 446 MHz
Frequency Range 446 MHz - 446 MHz
Mode USB
Modulation
ACF
Bandwidth 0 Hz
Location Worldwide
Short Description I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTY?). I'm attaching an image and a 2 seconds IQ sample.
I/Q Raw Recording
Audio Sample

Description[edit]

I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTYRadio TeleTYpe?). I'm attaching an image and a 2 seconds IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample.

Link to original IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. https://mega.co.nz/#!WphxFT6I!Mx9rv6tTnGARfFOebK2463phVY73ILOS5NfUB3vNSQk

Audio Sample[edit]

Sample recorded on USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) mode.

Hypothesis[edit]

Looks like it could be RTTYRadio TeleTYpe via NFMNarrowband Frequency Modulation (instead of the normal SSBSingle-sideband modulation mode). Note the carrier and multiple sidebands that are duplicates of each other.