RESEARCH OF INTERFERENCE IN THE ORTHOGONAL HARMONIC SIGNALS TRANSMISSION SYSTEMS WHEN SIGNAL PARAMETERS AND CHANNEL CHARACTERISTICS VARIATION

Abstract

The article presents the results of research of the interference noise in the orthogonal harmonic signals transmission systems with the traditional envelope shape of the group linear signal and the generic class with the optimum envelope shape, on the example of the ADSL2+ system, which operates on the ТПП-0.5 type telephone cable. Effective value of the interference noise to signal ratio distribution on the downstream information channels of the ADSL2+ 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.