Japan Military 8-Channel FSK

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Japan Military 8-Channel FSKFrequency-Shift Keying
Japan 8 2-fsk.jpg
Frequencies 12384.5 KHzKiloHertz (kHz) 10^3 Hz12,384,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
12.385 MHzMegaHertz (MHz) 10^6 Hz
,16553.5 KHzKiloHertz (kHz) 10^3 Hz16,553,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
16.554 MHzMegaHertz (MHz) 10^6 Hz
12,384.5 kHzKiloHertz (kHz) 10^3 Hz
12.385 MHzMegaHertz (MHz) 10^6 Hz
16,553.5 kHzKiloHertz (kHz) 10^3 Hz
16.554 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 12.385 MHzMegaHertz (MHz) 10^6 Hz12,384,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
12,384.5 kHzKiloHertz (kHz) 10^3 Hz
- 16.554 MHzMegaHertz (MHz) 10^6 Hz16,553,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
16,553.5 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation FSKFrequency-Shift Keying
ACFAutoCorrelation Function
Bandwidth 2400Hz2.4 kHzKiloHertz (kHz) 10^3 Hz
0.0024 MHzMegaHertz (MHz) 10^6 Hz
2.4 kHzKiloHertz (kHz) 10^3 Hz
0.0024 MHzMegaHertz (MHz) 10^6 Hz
2.4 kHzKiloHertz (kHz) 10^3 Hz
0.0024 MHzMegaHertz (MHz) 10^6 Hz
Location Japan
Short Description Data signal thought to originate from Japanese Military/Navy
I/Q Raw Recording
Audio Sample

Data signal thought to originate from Japanese Military/Navy. Although 8-Channels are used, it is actually two FSKFrequency-Shift Keying channels duplicated with Orthogonal Frequency-Division Multiplexing (OFDMOrthogonal Frequency-Division Multiplexing) among the other 6 channels for high redundancy.

The signal consists of two independent FSKFrequency-Shift Keying-2 channels which are doubled according to a cross-schema. All four channels use the Manchester code and, with time offset between the two channels, formed using OFDMOrthogonal Frequency-Division Multiplexing.


Samples[edit]

Sample 1:

Sample 2:

Frequencies[edit]

Seen at:

  • 16553.5 KHzKiloHertz (kHz) 10^3 Hz/USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)~1900z
  • 12384.5 KHzKiloHertz (kHz) 10^3 Hz/USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)~1900z

Additional Links[edit]


Additional Images[edit]