SIGNAL QUALITY DETERMINATION IN CABLE NETWORKS Russian patent published in 2012 - IPC H04B3/46 

FIELD: information technology.

SUBSTANCE: method comprises steps for providing a network model comprising interconnections and one component model, providing an input signal, determining an output signal using the input signal and the network model, and determining a signal quality measure using the input signal and the output signal, where the network model is a model of a cable television network, the input signal comprises multiple frequency domain representations of constituent signal components, the output signal comprises a frequency domain representation of a cable network output signal, and where the step for determining the output signal involves: using the network model to simulate the behaviour of the cable network in response to the input signal, determining frequency domain intermodulations by effecting convolutions of spectra of the constituent signal components, and using the frequency domain intermodulations, in addition to the output signal, to produce the signal quality measure.

EFFECT: high accuracy of determining signal quality.

17 cl, 4 dwg