EMI-debugging of Complex Systems using Different Time, Modulation, STFFT and Frequency Domain Signal Analysis Techniques
This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/1591
There were 10 downloads as of 28 Jun 2016.
One faces a difficult situation in EMI debugging if multiple sources radiate at the same frequency, especially, if little details on the EUT are provided. In this paper, we apply and compare a set of signal analysis techniques for identifying radiated emission sources. First, theoretical background of Joint Time-Frequency Analysis (JTFA) is given and an algorithm using Short-Term Fast Fourier Transform (STFFT) approach is applied for the data analysis. STFFT analysis provides an exclusive insight into time-dependent emission processes. Also, narrow span and zero span spectrum analysis are discussed. Special emphasis is given on signals sideband characteristics.