RECONSTRUCTION OF MULTIPLE SIGNALS FROM ELECTROMAGNETIC COIL MEASUREMENT

Gabriel Války

   This paper deals with electromagnetic coil measurement where a transmission on synchronous bus is captured, amplified and ana-lysed for reconstruction of multiple digital bus signals. This process is performed on handheld oscilloscope for designing a small and portable eavesdropping device that is able to monitor a communication between computer and keyboard by placing this device on keyboard cable. For reconstruction of highly degraded signal, methods of adaptive filtering are applied.

Keywords: coil measurement, measurement automation, adaptive filtering

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