ABSTRACT
This chapter provides an approach for determining the link quality in a low-voltage grid under the influence of the time-variant features of the transmission channel. Beyond noise scenario and channel transfer function (TF), there will be a focus on the access impedance of the low-voltage grid as a crucial factor. Noise plays a significant role in the channel impairment. On the one hand, the transmit signal is largely attenuated; thus, the communication quality is mostly determined by the different noise scenarios seen at the receiver. The coloured background noise is a collection of low-level noise from all possible sources. Its average power level is dependent on the number and type of connected and active electrical devices. Having performed the analysis of the TF, the received signal level is known at each frequency. The next step is to obtain an estimate of the noise level.
