Statistical Modeling of Brazilian In-Home PLC Channel Features

Abstract

This paper deals with the statistical modeling of key features of power line communication (PLC) channels that are necessary for designing data communication systems that operate over theses channels. The key features are average channel attenuation, root mean squared delay spread, coherence bandwidth and coherence time. All these features were estimated from in-home PLC channels measured in seven distinct Brazilian residences. Assuming that each feature is a random variable, four criteria (i.e., maximum likelihood estimate and three different information criteria) are used to select the statistical distribution that fits best to the data. The symmetry and asymmetry of the histogram associated with each feature is pointed out. The reported results focus on three frequency bands, namely: 1.7-30 MHz, 1.7-50 MHz and 1.7-100 MHz, which are in accordance with the standards used in Europe, North America and Brazil. The values obtained to Brazilian PLC channel features are different from those related to US and Europe channels reported in literature. Thus, the presented statistical models constitute an important tool to better design practical PLC systems that are suitable for Brazilian and in-home electric power grids.

An Analog Filter Bank-based Circuit for Performing the Adaptive Impedance Matching in PLC Systems

“…The curves of the scattering parameters, which are measured between the adaptive PLC coupling circuits, were performed in a 127 V rms 60 Hz electric power circuit with a power line of 15 meters in length and constituted by two parallel wires with 2.5 mm in diameter. The distance of 15 meters agrees with the distances observed in the average area of Brazilian apartments [46].…”

Characterisation of Signal Amplitude-Frequency for Indoor Power Line Communication Channel in the 1 — 30 MHz Broadband Frequencies

“…The table also compares the ACA values with those that exist in literature from other countries [13], [37]. From table 2, it can be observed that all the three statistical parameters -maximum, minimum and mean values of the ACA for Nigerian PLC channel are higher than what is obtained in Brazil and Spain.…”

“…Also, analysis of the ACG, RMS-DS and CB for the upper frequency edge of 300 MHz was carried out in Spain in [11]. In [12] and [13], extensive measurement campaign and numerical analysis of the ACG, RMS-DS and CB parameters for the Brazilian in-home power line channel were presented. In this research work, the results of preliminary measurements on the Nigerian indoor PLC channel are presented.…”