This thesis deals with an envelope detector in a test case of ePassport readers. For the transmission between passports and readers RFID (Radio Frequency Identification) is being used. The standard of test methods for ePassport is published in "ISO/IEC 10373-6:2001, Amendment 7 - Test methods for ePassport" and contains a source code which applies an envelope detector based on Hilbert transform to a measured input signal. The envelope has to fulfil a standardized shape.
This detector will be derived followed by an analysis of an implementation postulated in ISO/IEC 10373-6:2001, Amendment 7. This will lead to a list of properties and possible improvements. Based on this description a test case will be discussed using a simulation developed in Matlab. This testbed will contain a model of the signal source whose output signal is the input signal of a measurement path.