METHOD OF PROVISION OF RADIOCOMMUNICATION BETWEEN GUIDED OBJECTS AND CENTER OF GUIDANCE Russian patent published in 2007 - IPC G08B25/10 B60R25/10 H04B1/713 

FIELD: guide systems.

SUBSTANCE: method can be used for protection of real estate objects and transportation vehicles. Messages from any guided object (GO) are transmitted in general radio channel in form of hopping-signals which hopping-signals have to be packages of modulated signals with frequency and time positions changing by jumps. Messages from GO are received in guide center (GC); spectrum of signal of general radio channel is transferred by means of demodulation into lower frequency range, and truth or false in packages of demodulated signals are determined. At any GO the positions of signals in time and frequency are set by first random number of leading generator of random numbers independently on other GOs. At GC the spectrum of signal of general radio channel is subject to analysis by group receiver at k analysis intervals, which intervals are equal to duration T of symbol of signal packages and shifted in phase for equal sub-intervals being multiple to T/k. The k sequences of any signal packages are determined and one, demodulated sequence, is selected from them according to maximum of likelihood. Random numbers led generator is synchronized by first package with leading one and errors in position of any received package are revealed relatively position of package, defined by first random number of led generator. As information for subsequent processing, the packages are given with errors in positions being lower than admissible. False packages with errors of positions exceeding admissible ones are blocked and accompanied by detection signal of signal false package. At GC the packages from GO are received in narrow frequency band, which band corresponds to speed of signals. Position of band in general channel is set by frequency synthesizer being controlled by second random number of leading generator. Package of signals from GC is transmitted to GO with correction set by second random number of led generator which correction corrects frequency and time errors of position.

EFFECT: improved range and reliability of two-sided radio communication of GO and GC; detection of false messages.

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