FIELD: telecommunication systems and broadcasting networks. SUBSTANCE: during transmission system operates in other-than-main frequency band of source so that transmitting channel of 1 Ambit/s circuit capacity can transmit N Ambit/s over channel, where N is number of parallel bits integrated to be transmitted over channel of 1 Ambit/s circuit capacity. Process includes concurrent encoding of first group of parallel bits to form digitized voltage-amplitude signal in preset bit interval, modulation of carrier frequency by digital voltage-amplitude signal, transmission of modulated carrier over transmission path with limited frequency band and inherent noise, demodulation of mentioned modulated carrier signal, and reception of mentioned digitized voltage-amplitude signal; mentioned demodulation process actually provides for suppressing inherent noise and for enhancing mentioned output-signal-to-noise ratio; proposed process also includes decoding of digitized voltage-amplitude signal received within preset bit interval to form second group of parallel bits corresponding to first group of parallel bits. EFFECT: enhanced circuit capacity of channel.. 26 cl, 16 dwg
