SWED-ARQ

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SWED-ARQAutomatic Repeat reQuestAutomatic Repeat Query
SWED-ARQ.jpg
Frequencies 3 MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 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 600 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.6 kHzKiloHertz (kHz) 10^3 Hz
6.0e-4 MHzMegaHertz (MHz) 10^6 Hz
0.6 kHzKiloHertz (kHz) 10^3 Hz
6.0e-4 MHzMegaHertz (MHz) 10^6 Hz
0.6 kHzKiloHertz (kHz) 10^3 Hz
6.0e-4 MHzMegaHertz (MHz) 10^6 Hz
Location Sweden
Short Description SWED-ARQAutomatic Repeat reQuestAutomatic Repeat Query, also known as ARQAutomatic Repeat reQuestAutomatic Repeat Query-SWE, was a Swedish simplex ARQAutomatic Repeat reQuestAutomatic Repeat Query system used by Swedish diplomatic services. This protocol supported three packet lengths and was able to change packet length mid-transmission. No longer used today.
I/Q Raw Recording
Audio Sample
SWED-ARQAutomatic Repeat reQuestAutomatic Repeat Query, also known as ARQAutomatic Repeat reQuestAutomatic Repeat Query-SWE, was a Swedish simplex ARQAutomatic Repeat reQuestAutomatic Repeat Query system used by Swedish diplomatic services. This protocol supported three packet lengths and was able to change packet length mid-transmission. No longer used today.

SWED-ARQAutomatic Repeat reQuestAutomatic Repeat Query had 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Shift and typically ran at 100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. The three packet lengths it used are:

  • 3 character block, 210 msmilliseconds (.001 of a second)
  • 9 character block, 630 msmilliseconds (.001 of a second)
  • 22 character block ,1540 msmilliseconds (.001 of a second)

For all three packet lengths, the time between packets is 240 msmilliseconds (.001 of a second). When SWED-ARQAutomatic Repeat reQuestAutomatic Repeat Query is running at 3 character block packet size, it is identical to SITOR-A.

Samples[edit]

3 Char 9 Char 22 Char
Swedarq short.jpg
Swedarq med.jpg
Swedarq long.jpg

Additional Samples[edit]

22 Character Packets:


22 to 9 to 3 Character Packets:

Decoding Software[edit]

Professional Equipment/Software
  • Hoka Code 300-32
  • Shoc go2decode
  • Shoc go2monitor
  • Wavecom W-Code
  • Wavecom W-Spectra
  • WinRadio Universal FSKFrequency-Shift Keying Decoder

Additional Links[edit]

Additional Images[edit]