General Information
Automatic Link Establishment third generation is based on the standard MIL-STD 188-141B App.C, also known as STANAG 4538. ALE-3G is an improved version of ALE-2G, it is tailored to the needs of modern tactical communications systems. This system is used to detect and assign the HF-channel which is considered most reliable for data-communication at the given time.
Usage:
§ Detection of the HF-channel best suited for data-transfer between two stations or broadcast transmissions.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
PSK |
|
|
Tones |
8 |
|
|
Bandwidth |
3000 |
|
|
Symbol rate (Bd) |
2400 |
|
|
Data rate (bit/s) |
3600 |
|
|
Alphabet |
ITA5 |
|
Demodulator Settings |
Demodulator |
PSK 2,4,8 A/B |
|
|
Symbol rate (Bd) |
2400 |
|
|
ST tolerance (Bd) |
1 |
|
|
Modulation order |
8 |
|
|
Version |
A |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
yes |
|
|
Automatic Polarity Adjustment |
yes |
|
|
Combination with other modems (modem list) |
yes |
|
Tuning |
The tuning frequency is midway between channels 4 and 5 | |
Table 4: ALE-3G
Remarks
§ Supported burst waveforms : BW 0, 1, 4, 5, all without link protection
§ All supported burst waveforms include additional decoded PDU frames output
§ Burst waveforms BW 2, 3, 6 detection only
Figure 7: ALE-3G Spectrogram
Modem Version History
|
Release |
Date |
History |
|
2.2.0 |
2014-03-19 |
Modem added |