COMMUNICATION SYSTEM Russian patent published in 2001 - IPC

FIELD: transmission and reception of discrete information by wideband communication systems with successive multifrequency signals. SUBSTANCE: one P-channel multiplexer is introduced to each known unit: information sensor, successive multichannel signal generator, switch, output unit, input unit, returnable filter unit, resolver unit, clock-pulse generator, pseudorandom rearrangement unit and to frequency synthesizer on the transmitting and receiving sides of the system. Modulation by the character imparting the pseudorandom sequence determining the frequency sequence of the successive multifrequency signal elements is accomplished in the claimed system non-determinantly but stochaistically: for each element of the successive multifrequency signal a column of pseudorandom numbers is generated, being a rearrangement, from which a definite number (position) is compared to each probable value of the information character, whose totality during the length of the successive multifrequency signal makes up a set of lines, and modulation consists in selection of the pseudorandom line melting the information character being transmitter at the given moment. EFFECT: protection against simulation of the character being transmitted, for example, by a shift of the elements of the successive multifrequency signal corresponding to it by one and the same frequency value. 4 dwg