RU94003861A - Method of amplitude multiplexing of signals - Google Patents

Abstract

FIELD: multichannel communication systems. SUBSTANCE: the general principle of multiplexing of several (n) input signals at data transmission is as follows. Input signals are subjected to a certain conversion and replaced by a single resultant signal. This signal is transmitted over one communication channel. At the output the arrived signal is subjected to inversion, as a result, n input signals are obtained with a preset accuracy. According to this principle, in case of frequency multiplexing the spectra of input signals are transferred upwards in frequency and get summed up so that a single resultant signal is obtained. At the output separate converted signals are discriminated by means of filtration, and source input signals are discriminated by means of their detection. The following is meant under amplitude multiplexing of signals: (1) replacement according to a definite rule of amplitudes of several input signals at one and the same time moment with one amplitude of the resultant signal at the same time moment; (2) possibility to restore at the respective time moment the amplitude of source signals with a certain accuracy by means of a certain inversion. The offered method differs from the known one by utilization of direct diophant conversion of amplitudes of several (n) multiplexed signals at each time moment as direct conversion of signals, and diophant inversion of amplitudes at each time moment - as inversion of signals. Practically direct diophant conversion can be accomplished by different methods. For example, the amplitude of one of the signals is increased in succession with step I by value nT, where T is one of the incommensurable periods of utilized diophant conversions, n is the natural number. Realization of diophant inversion - production of signals at the outputs of periodic converters with incommensurable periods is accomplished by conversion of the resultant signal by one of the periodic converters with incommensurable periods. EFFECT: effective use for multiplexing of data in the form of pulsing signals; in computer medium.

Claims (1)

The general scheme of multiplexing several n input signals during the transmission of information is as follows. Input signals undergo some transformation and are replaced by a single resulting signal. This signal is transmitted over a single communication channel. At the output, the incoming signal undergoes inverse transformation, as a result of which n input signals are obtained with a given accuracy. According to this scheme, in the case of frequency multiplexing, the spectra of the input signals are transferred upward in frequency and summed, so that one resulting signal is obtained. At the output, with the help of filtering, individual converted signals are extracted and, with the help of their detection, the initial input signals are extracted. By amplitude compression of signals we mean the following: 1) replacing, according to a certain rule, the amplitudes of several input signals at the same moment in time with one amplitude of the resulting signal at the same time; 2) the ability to use some inverse transformation to restore at the appropriate time the amplitudes of the source signals with a given accuracy. The proposed method differs from the known one by using as a direct signal conversion a direct Diophantine transformation of amplitudes of several n compressed signals at each moment of time, and as an inverse signal transformation, an inverse Diophantine transformation of amplitudes at each time point. Almost direct diophantine conversion can be performed in various ways. For example, to increase the amplitude of one of the signals sequentially with step T by the value of nT, where T is one of the incommensurate periods of the diophantine transformations used, n is a natural number. The inverse Diophantine transformation is realized - the signals at the outputs of periodic converters with incommensurate periods are obtained by converting the resulting signal by one of the periodic n transformations with incommensurate periods. The proposed method of amplitude compression can be effectively used to compress information in the form of pulsed signals in the environment of electronic computers.