System for transmitting information in the prescribed frequency-band

Claim 1

A transmission system for the transmission of information in a predetermined frequency band, comprising a transmitter and a receiver, said transmitter comprising a source of main information signals, a source of auxiliary information signals in the form of a periodic pulse pattern that is not correlated with said main signals, a source of transposing oscillations, means for modulating said main information on said transposing oscillations, means for varying the frequency of said transposing oscillations with said auxiliary signals, and means for linearly adding and transmitting said auxiliary signals and the output of said modulating means without frequency separation and without time separation; said receiver comprising means for receiving said linearly added signals, a source of local information signals in the form of the periodic pulse pattern generator by said source of said auxiliary signals, first modulator means, means applying said receiver signals and said local information signals to said first modulator means for producing a control signal for automatic phase connection of said local information signals, an output circuit, and frequency transposing means for applying said receiver signals to said output circuit, said frequency transposing means comprising second modulator means, a source of local oscillations connected to said second modulator means, and means for carrying the frequency of said local oscillations with said local information signals.