FIELD: physics.
SUBSTANCE: signals are generated at the transmitting side at first and second subcarrier frequencies fH1 and fH2, which differ from the carrier frequency by the frequency modulation depth value (deviation) Δf: fH1=fH+Δf and fH2=fH-Δf, and two different models are used to represent the binary code of the group signal with logic levels defined as "low" and "high" potential. The first model is the original model and comprises binary logic pulses with symbol duration τc, and the second is a derivative obtained from the first by addition with a square wave which represents clock pulses with duration According to the law of variation of the first series of binary logic levels, each of the subcarrier frequencies is phase modulated with conversion of the sine curve to a cosine curve and vice versa. The second binary logic is used to perform time compression of two subcarriers, owing to which only one information transmission channel is used.
EFFECT: more secure and reliable unlocking of any secure technical objects having an actuating locking mechanism in their composition.
3 cl, 4 dwg
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Authors
Dates
2013-02-20—Published
2011-07-29—Filed