Power Line Communications Based on Ofdm

Power lines and their associated networksare not designed for communications use. They are ahostile environment that makes the accurate propagationof communication signals difficult. Noise levels areoften excessive, and cable attenuation at the frequenciesof interest is often very large. Important channelparameters such as impedance and attenuation are timevarying in unpredictable ways. This article covered PLCtechniques. Technical issues such as the challenges facedby PLC communications, an exploration of moderncommunications strategies suited to improving theperformance of PLC systems, and considerations uniqueto PLC systems have been addressed.Exact analytical expression for the spectral correlationfunction of OFDM signal with cyclic prefix is derivedapplying the proposed method and some computed andgraphed results are presented. Abstract: U radu je ukazano na probleme prenosadigitalnih signala distributivnim energetskim vodovimaniskog napona u okviru stambenih zgrada. Predlozen jemetod i izveden je tacan analiticki izraz za funkcijuspektralne korelacije OFDM signale, na osnovu koje bise odredjivala spektralna karakteristika, kao osnova zaadaptivni prenos podataka vecim brzinama. U radu je ukazano na probleme prenosadigitalnih signala distributivnim energetskim vodovimaniskog napona u okviru stambenih zgrada. Predlozen jemetod i izveden je tacan analiticki izraz za funkcijuspektralne korelacije OFDM signale, na osnovu koje bise odredjivala spektralna karakteristika, kao osnova zaadaptivni prenos podataka vecim brzinama. KOMUNIKACIJA ENERGETSKIMVODOVIMA NA BAZI OFDEM