WAVECOM W-Classifier-WB for W-CODE, W-PCI, W-PCIe

SFT62

 

 

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Classifier (Option)

The ability to rapidly identify unknown signals has become an essential requirement in signal analysis.

The automation of the signal classification process relieves the operator from manual evaluation, which otherwise requires considerable skill 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 classification algorithm determines the center frequency, speed (symbol rate), shift, bandwidth and modulation.

The detection and classification results are displayed in a list together with all parameters and are fully in-tegrated into the WAVECOM® user interface.

Spectrum/Sonagram display

The monitored frequency spectrum is displayed in a spectrum-sonagram pane. After classification has com-pleted the classified signals are indicated in the spectrum display.

Classification

The results of the classification are shown as a list in a second pane. The following parameters are provided for each classified signal:

Modulation type

Center frequency of the signal

Number of carriers in the case of multi-carrier FSK

Baud rate in the case of FSK or PSK signal

Frequency shift in the case of FSK signal

Bandwidth

Additional information

Additional FSK, MFSK and PSK information on symbol timing and constellation, baud rate and frequency vs. time is graphically displayed in a separate window when a classified signal is selected from the list.

W-Classifier-WB Specifications (For detailed specifications, see datasheet)
Bandwidth HF/VHF/UHF 0.5 kHz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 12 kHz, 24kHz, 48 kHz or 96 kHz
Sampling interval (Ts) 1.6 or 3.2 sec
CW Ts=1.6 sec: 6 to 60 Bd ;Ts=3.2 sec: 3 to 60 Bd
FSK 30…0 kBd, Shift ≤30 kHz
FSK-4/F7B 30 to 300 Bd, Shift ≤3500 Hz
MFSK 4-36 tones
PSK 2/4 Variant A/B 30 Bd to 60 kBd
PSK 8/16 Variant A/B 30 Bd to 60 kBd
CIS-12 120 Bd
OFDM 25-512 carriers
OQPSK 25 to 30 kBd
Voice (AM/FM/USB) Yes
Sub-carrier modulation (AM, FM, SSB) Corresponds to the values for the primary modulation type

The Classifier-Code-Check (CCC) is a versatile analysis tool for the classification of unknown signals and the determination of the protocol (mode) in use. The CCC will attempt to process all signals within the band-width of the narrow-band or wideband WAVECOM® classifier (W-Classifier-NB, W-Classifier-WB).

The CCC processes input signals in up to four successive steps as shown in the state diagram above. The us-er can select how many steps should be involved in the analysis of the signal(s) under investigation.

The CCC signal processing states are listed below,

The classifier attempts to classify the input signals according to their modulation formats

The table check will check the signal against the entries of an XML-formatted mode list

The code check will attempt synchronization against classified modes

Finally the signal may be forwarded to a decoder for output

 

Classifier-Code-Check Editor

An XML table editor is provided which allows extending, modifying or deleting records in the XML table used for mode look up.