DEVICE FOR GUARD ALARM WITH REMOTE RADIO COMMUNICATION Russian patent published in 2003 - IPC

FIELD: radio engineering, applicable for protection against thefts of automobile transport, individual garden plots, as well as for protection of compartments against a break-up and fire alarm. SUBSTANCE: the device has a transmitting station and a receiving station. The transmitting station has a unit of transmitters, reference generator, source of discrete messages, phase manipulator, source of analog messages, amplitude modulator, transmitter and a transmitting antenna. The receiving station has a receiving antenna, receiver, spectrum analyzers, phase doubler, comparison unit, key, amplitude limiter, synchronous detector, AF signal amplifier, acoustic radiator, delay line, phase detector and a recording unit. EFFECT: enhanced true information for the guard alarm with a remote radio information for the guard alarm with a remote radio communication by using complex signals with a combination amplitude modulation and phase manipulation (AM-PhM). 11 dwg