Dielectric constant identification for simple layered media using noisy input signals

The authors used the layer-peeling method to determine the scattering parameters of non-magnetic simple materials. Applying sine probing (input) signals to various concatenated lossless transmission line sections produced simulated test data that were used in an algorithm designed to in turn identify the sections. Accurate system identification resulted in cases of using both noisy and non-noisy probing signals, where reflection coefficient errors were often less than one percent. Identification was possible using filtered as well as non-filtered noisy data. Allowances were made in signal processing for the differences in sampling times and the times signals arrived at section boundaries.