RESEARCH OF DEPENDANCE OF HARMFUL INTERFERENCE IN SYSTEMS OF BROADBAND ACCESS OVER ELECTRICAL WIRING NETWORK ON GUARD INTERVAL DURATION

Abstract

This article is dedicated to research of harmful interference that appears in BPL TS (transmission system) when working on domestic electrical wiring networks. Dependences of harmful interference at the input of the BPL TS receiver on the channel number and the number of the sample of the group signal from which its processing in the receiver is beginning are calculated for different guard interval durations on the basis of existing method (300 m). The calculations are performed for the case of BPL TS working on homogeneous line with fixed length, created by widely used in our country for electric wiring networks construction two-core PPV type wire with cross-sectional area of conductors is 2,5 mm2. The dependences of harmful interference in BPL TS on the beginning of the group signal processing in the receiver moment and on the duration of the guard interval are discovered.