FIELD: electric communications including multichannel communication; multichannel analog transmission systems. SUBSTANCE: on sending end, channel signals are multiplied by harmonic carriers of waves, signals obtained are summed up and transmitted through common channel; on receiving end, in order to discriminate channel signals, common signal is multiplied by carriers of waves of same frequencies and filtered off; novelty is that on sending end, each of N = 2n channel signals is simultaneously multiplied by n+K (n=1, 2.. . , K - 0, 1, 2...) harmonic carriers which have one of their frequencies higher than maximum frequency of channel signals, frequency of each next one being twice as high as that of preceding one, frequency of last carrier is twice or more higher than that of preceding one, and phase of each carrier is of one of two possible values differing by value other than a multiple of 180 deg; for different channel signals of phase, at least K+1 carriers are different; on receiving end, in order to discriminate definite channel signal, common signal is simultaneously multiplied by n+K carriers of same frequencies; while on transmission end, phases of carriers of particular channel signal are of one of two mentioned possible values, on receiving end, phases of carriers differ by 90 deg from other possible value. EFFECT: provision for similar conditions in transmitting all channel signals in common channel; improved frequency characteristics of channels without noticeable extension of spectrum inherent to digital transmission systems, simplified hardware implementing this technique. 2 dwg
