Measurement of Notch Depths for G3-PLC

Nowadays, Power Line Communication gains wide usage across several European countries. One of the used Power Line Communication standards is the G3-PLC standard. To enable coexistence with several radio services, the G3-PLC standard provides the option to notch certain frequencies. Since the method to measure the depth of these notches described by the standard is not suitable, this work is going to introduce a new method.This method estimates the power spectrum under usage of the Bartlett-Hann window. From this spectrum, only those bins are selected that lie on active or notched subcarriers. The spectrum is measured in sections, and each section is assigned to one of several differently modulated frame parts. For each part, the notch depth is calculated and the lowest notch depth among all frame parts is selected as the overall notch depth achieved by the G3-PLC device. The method also offers the possibility to detect violations where this notch depth is not reached.