COMMUNICATION SYSTEM FOR THEFT-PROTECTED CAR Russian patent published in 1997 - IPC

FIELD: car and industrial objects protection. SUBSTANCE: transmitting part of device has clock oscillator, generator of message duration , generator of pause duration , counter of code messages (pauses), OR gates, setter of priorities of detectors, register, random number generator, time interval setter, initial setting unit, alarm signal generator to radio channel and alarm signal generator for car. EFFECT: increased volume of information to be transmitted, increased probability to receive correct alarm signal in noise condition, in particular, simultaneous operations of several similar devices which operate on same or close frequencies, self-test mode, decreased probability of false alarm due to adaptation of communication channel to receiving conditions using criterion of minimal probability of false alarm. 2 dwg