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W61CL or W-CODE-CL
 
Classifier and Code Check (CCC)

The WAVECOM classifier is an important analysis tool for classifying unknown signals. The purpose is to determine the modulation type, baud rate, frequency shift and bandwidth of one or more signals.
This option is only available for government bodies!
Currently, the classifier can detect:
  • Carriers
  • FSK signals from 2-FSK up to 34-FSK
  • FSK, F7B variant
  • PSK signals, DBPSK, DQPSK, D8PSK and D16PSK A and B variants
  • CW signals
  • OFDM
The classifier option is available for the W61PC, W61LAN, W51PC, W51LAN. In the current implementation signals in a 4 kHz or 8 kHz frequency range are classified. "Classification and Code Check" (CCC) of multiple signals in the same frequency range are supported.
 
Highlights
  • Automatic classification of radio data signals.
  • Automatic classification and code check (CCC) of radio data signals.
  • Extension to the WAVECOM decoders.
  • Fully integrated into the WAVECOM user inter­face.
The classifier is a software option for the professional versions of the WAVECOM decoders. The ability to rapidly identify unknown signals has increasingly become an essential requirement in signal analysis. The automation of the signal classification process relieves the operator from manual evaluation, which otherwise requires considerable skills and experience. The combination of a classifier and a decoder thus satisfies the requirement for an automatic system that is able to rapidly and reliably determine the characteristics of radio data transmissions within the signal spectrum being monitored. The user interface of the WAVECOM classifier is fully integrated as a software module in the existing hardware and professional software.
 
Classifier Operation

The HF classifier user interface consists of two windows:
  • A FFT window
  • A classification result window.
Two classification modes are provided:
  • Manual mode
  • Continuous mode.
In the manual mode, the classifier can be manually restarted by pressing a Start button. 
In the continuous mode, the signals are classified depending on the Restart Cycle selected in the settings. Automatic restart cycles ranging from 4 s to 3600 s are valid.
If Refresh List is checked, the list will be cleared after every classification attempt. Continuous mode can be stopped by pressing the Start/Stop Classifier button. The classifier allows only one classification attempt at a time. After a few seconds (depending on the complexity of the signal) the result of the classification attempt is displayed in the result window. Each signal is numbered and corresponds to the signal marker in the FFT window. The last classifier state is visible in the status bar, even if signals were not classified. After each restart, the result window will be cleared
 
Classifier Code Check (CCC)

The HF Classifier Code Check is a comprehensive analysis tool for classifying unknown signals combined with an advanced code check to determine the transmission mode under observation (code). The Classifier Code Check has the ability to check several signals at the same time.
The user interface consists of five sections:
  • sonagram / Code check options window selectable by tabs
  • FFT window
  • signal list output from classifier
  • classified signal code check tree view
  • text status output
HF Classifier Code Check runs in automatic or manual mode. If required it can manually be stopped or restarted. After a successful classification has been achieved, code checking starts. If a valid mode is found, the software starts with automatic decoding.

Different settings are possible to adapt the system according to the customer's requests:
  • Single Button Operation: Classify, system selects the signal with the highest confidence and runs a code check on this signal. If a valid code is found, decoding is started.
  • Single Button Operation: Classify, system selects the signal with the highest signal level and runs a code check on this signal. If a valid code is found, decoding is started.
  • Classify and check all available signals from the signal list. If all code checks are finished, the user must choose the desired mode, which immediately starts with decoding.
  • Classify all signals. The user selects one signal for code checking. If a valid code is found, decoding is started.
  • Classify all signals. The user selects one signal for code checking. If code check is finished, the system waits for commands.
Sample
  • Typical situation with multiple signals

  • Start Classifier Code Check (CCC)

  • The three signals are classified.
    Results:
    • FSK-8 with 93% confidence
    • PSK-2A with 86%
    • F1B (FSK) with 77%
  • Code checking on the FSK-8 signal is started (best confidence)!

  • Piccolo-8 text output

During this steps not a single user intervention was necessary!