Sandbox:STANAG 4285
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Input SIGIDWIKI
Vorlage:Signal STANAG 4285 is specified by the NATO (North Atlantic Treaty Organization) Military Agency for Standardization in "Characteristics of 1200 / 2400 / 3600 Bits per Second Single Tone Modulators / Demodulators for HF Radio Links". This data modem is very similar to MIL-STD-188-110 Serial.
Characteristics
STANAG 4285 has a variety of speeds and interleaving. Speeds range from 75 bps up to 3600 bps. Two interleaving modes exist: Short and Long. Short interleaving allows for faster transmission at the cost of less robustness against effects of fading. Long interleaving extends the interleaving period so that messages take longer to send, but are more robust against fading from propagation effects.
BPSK, QPSK, and 8PSK are used with STANAG 4285 for specific speeds.
| Symbol Rate (baud) |
User Data Rate (bps) |
Bits per Symbol (Modulation) |
FEC Encoding Rate |
Supported Interleaving |
|---|---|---|---|---|
| 2400 Bd | 2400 bps | 3 (8-PSK) | 2/3 | Short or Long |
| 2400 Bd | 1200 bps | 2 (QPSK) | 1/2 | Short or Long |
| 2400 Bd | 600 bps | 1 (BPSK) | 1/2 | Short or Long |
| 2400 Bd | 300 bps | 1 (BPSK) | 1/4 | Short or Long |
| 2400 Bd | 150 bps | 1 (BPSK) | 1/8 | Short or Long |
| 2400 Bd | 75 bps | 1 (BPSK) | 1/16 | Short or Long |
| 2400 Bd | 3600 bps | 3 (8-PSK) | None | None |
| 2400 Bd | 2400 bps | 2 (QPSK) | None | None |
| 2400 Bd | 1200 bps | 1 (BPSK) | None | None |
There are also variants of 4285, including one used in Thales Système 3000 HF Modems (e.g TRC-1752). The unique identifier of these is the existence of a special preamble at the beginning of the transmission.
Samples
| IDLE | TFC | 8-PSK |
|---|---|---|
| <html5media>File:STANAG4285_IDLE.mp3</html5media> | <html5media>File:STANAG4285_TFC.mp3</html5media> | <html5media>File:STANAG_4285_8PSK_January_29_2016_5758.6kHz.mp3</html5media> |
| Thales Système 3000 Variant |
Thales Système 3000 FEC Variant |
|---|---|
| <html5media>File:4285STNG.mp3</html5media> | <html5media>File:SYS3000-FEC_STANAG_4285_FEC-VARIANT.mp3</html5media> |
Frequencies
Found on many HF frequencies between 1.89 MHz to 22.7 MHz. Full observed frequency list can be found at Global Tuners
Decoding Software
- Hobby Level Software
- Professional Equipment/Software
Video Examples
- SWDMA Step-by-step analysis and decoding of a STANAG 4285 signal transmitted in shortwave.
- Stanag 4285 Decoding with RTL-SDR (RTL2832), Sorcerer and SDR Sharp
- Strong Fading on Military STANAG 4285 Signal
- STANAG 4285 - some Examples
- Modulation Example, digital, STANAG 4285, 6383 kHz, USB, August 16, 2011, 1119 UTC
- STANAG-4285: See-and-Hear Radio v2.0 HD
- Decoding STANAG4285 with Multipsk
Additional Links
- Radioscanner.RU Thales TRC-1752 STANAG 4285 Variant
- I-56578 STANAG 4285
- shoc Database: STANAG 4285
- WAVECOM Database: STANAG 4285
- Some Notes on STANAG 4285 (PDF) via the UDXF website
Additional Images
Input HF-UNDERGROUND-WIKI
STANAG 4285 is the NATO standard for HF communication. It consists of several sub modes (75-2400 bps) and two different interleaving options (short and long). The waveform consists of a 1800 Hz carrier with PSK modulation.
These STANAGs are similar in principle to MIL-STD-188-110B, but differ in some details. Most notably they lack the “auto-baud” feature and are also incompatible with the 110A waveforms.
External links
- NATO STANAG*4285: unclassified specification (PDF)
- STANAG 4285 - some Examples on Youtube
Eigener Artikel
Wird noch geschrieben! --TiNG (Diskussion) 12:14, 2. Aug. 2018 (CEST)