Efficiency of generalized class orthogonal harmonic signals application in G.fast transmission systems

In this paper the results of research of interference noise in G.fast transmission systems (TS) using orthogonal harmonic signals (OHS) with a traditional envelope shape of a group linear signal and a generalized class (GC) with an optimal envelope shape, when working on a TPP-0.4 type telephone cable are given. Effective value of the interference noise to signal ratio distribution on information channels of the G.fast system, depending from the integration beginning sample number value at the guard time interval duration and line length variation is determined. The optimal integration beginning sample value depending on the signal parameters and the channel characteristics and corresponding values of the arithmetic average effective value of the interference noise to signal ratio for all information channels are determined. Achievable transmission rate of the G.fast systems at the guard interval duration optimizing is estimated.