Mobility Investigate

Line Topology Estimation of Indoor Power Lines Using Multipoint Single Ended Loop Testing

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Executive Summary

Quality of broadband connectivity over a residential power line is dependent on its topology which is very different from twisted pair copper used in telephony. In this paper methods to estimate the topology of a power line are investigated. A two step procedure comprising of a set of Correlation Time Domain Reflectometry (CTDR) measurements based on Single Ended Loop Testing (SELT) and an initial topology estimate as a first step, followed by a comparison with Frequency Domain Reflectometry (FDR) measurement as a second step to finally ascertain the power line topology. A set of codes with complementary autocorrelation property is used for probing the line.

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