go2MONITOR, an advanced concept for HF-VHF-UHF data protocol decoding. A smart solution including SDR control, recording, classification and decoding. Manual processing of relevant, intercepted communication is too expensive, too slow, insecure and incomplete. In this situation an automatic, flexible and expandable approach must be used at reasonable size and cost.
|Delivery||New license file for go2MONITOR|
additional narrowband receiver(s)
go2DECODE for decoder programming
|Use cases||To monitor signals outside the bandwidth of the wideband receiver|
|Training||Part of go2MONITOR training, 4 days|
At a Glance
In the basic version the production channels processes signals inside the wideband stream of the receiver. To monitor signals outside this bandwidth 4 (GO2MON-NRC4) or 8 (GO2MON-NRC8) additional narrowband receivers can be added.
- Frequency independent production in all 4 or 8 production channels
- Narrowband receivers can offer a better sensitivity compared to wideband receivers
- Narrowband receivers consum less ressources, as no DDC is required
- Possibility to add "virtual" receivers, which can connect to third parties DDC's or streams
- Signal processing also during receiver working in scan/step mode
The operator can choose the emission/frequency in the GUI (directly in the spectrogram, from classification results or from the station list) and decide if it should be extracted from the wideband input by using a DDC-channel or by using NB-receivers.
Each extracted narrowband channel is marked in the wideband spectrogram. An interactive interface for processing and fine-tuning the narrowband signal is available in the GUI. This interface can also display a zoomed-in spectrogram of the single channel with much higher spectrum resolution then in the wideband spectrogram.
The required frequency of the channel can be selected directly in the wideband spectrogram by using the mouse or by entering numerical values directly in the channel fine-tuning interface.
NB-Receivers vs. DDC-Server
Both solutions for NB-signal extraction have advantages and disadvantages. DDC-Server can usually offer more channels and higher flexibility in a more compact form then by using external receivers. The biggest disadvantage of the DDC-server is that it can extract only signals from the currently available frequency range of the wideband receiver. This makes it unusable if the receiver is in sweep or scan mode. In that case, NB-receivers provide the right solution by being completely independent from the current frequency range of the wideband receiver. Of course, it is also possible to use DDC and narrowband receivers side by side.
Additionally in larger systems the NB-receiver can be simulated by an external DDC server or a receiver that is already able to dliver multiple IQ IF streams