METHOD OF DETECTING ELECTRONIC DEVICES Russian patent published in 2013 - IPC G01S13/88 

FIELD: radio engineering, communication.

SUBSTANCE: long-duration code-phase-shift keyed (CPSK) radio pulse is generated by joining M>1 partial radio pulses at carrier frequency of a probing signal f₀ of the same amplitude u₀, same duration τ₀ for a limited number P>1 of different possible values of the initial oscillation phase φ_i, where $$i=\overline{\mathrm{0,}P-1},$$ emitted into the probed region in space, the echo signal from a target is processed in a matched filter with a pulse characteristic which is a mirror to the intra-pulse phase-shift keying law of the radio pulse; the value of the initial phase φ_i of each of the M partial radio pulses of the generated probing CPSK radio pulse is reduced D times, where D is the number which is a multiple of the number of all received frequency harmonics of the echo signal, and the phase of the matched filters of N receiving channels is varied according to the law nφ_i/D, where $$n=\overline{\mathrm{1,}N}$$ is the number of the receiving channel.

EFFECT: enabling simultaneous matched filtration of echo signals of objects with nonlinear electrical properties on all N harmonics of the probing signal.

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