An Analytical Method for Network Loading Estimation based on Channel Training

International Symposium on Power Lines Communications - ISPLC 2003, Kyoto, Japan, March 2003.

Abstract: Estimation of network loading conditions can assist the prediction of the channel behavior between any two communicating devices in a power line network, thus making the use of adaptable transmission techniques more feasible. This paper presents a method for impedance estimation at the termination points of a power line network by exploiting the data sequences transmitted during channel training. The network is considered as multiple point-to-point links, whose characteristics are affected by the impedances of the loads connected at all termination points, and their transfer functions can be used to determine the reflection and transmission coefficients at all points of discontinuity inside the network and finally to estimate the connected impedances. The limitations of the proposed method are analysed and an example that demonstrates the method's effectiveness is presented.

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