EFFICIENCY OF PARAMETERS VARIATION IN THE TRANSMISSION SYSTEMS BY ORTHOGONAL HARMONIC SIGNALS

Abstract

In the article the research results of efficiency of group signal parameters variation of the transmission systems (TS) using systems of orthogonal harmonic signals (OHS) by estimating the achievable transmission rate in the presence of interference noises are given. Modeling of the operation of transmission systems by orthogonal harmonic signals with the traditional envelope shape and signals of the generalized class with the optimal envelope shape of the group linear signal with different guard interval values for example ADSL2+ system is carried out. An estimation of the achievable transmission rate by orthogonal harmonic signals transmission systems over ТПП type telephone cables with considering the power of interference and additive noises with guard interval duration variation is given. The guard interval duration increasing is more effective in the OHS TS with the traditional envelope shape, while the generalized class orthogonal harmonic signals provide the transmission rate increasing over channels with frequency distortions, in comparison with the traditional ones is proved.