METHOD OF DETECTING OBJECTS OF WIRELESS INFORMATION TRANSMISSION NETWORKS Russian patent published in 2019 - IPC G01S13/02 

FIELD: radar ranging.

SUBSTANCE: invention relates to methods and means for short-range radar ranging of nonlinear scattering radioelectronic objects, namely, to methods of detecting objects of wireless information transmission networks (WITN) hidden in near-surface layers of natural and artificial media and in passive mode. In order to improve characteristics of detecting objects of WITN against background of interference signals from inertia-free nonlinear scattering objects in a nonlinear radar, two radiation modes are used: in the first one – simultaneous emission of a pair of harmonic signals with frequencies f₁ and f₂ (fi < f₂) on time interval [0; T], and in the second one – simultaneous emission of the second pair of harmonic signals with frequencies f₁* and f₂* on time interval [T; 2T], wherein in both modes emitted frequencies are located symmetrically relative to central frequency f₀ of the input loop of the object of WITN, and their average values (f₁ + f₂)/2 and (f₁* + f₂*)/2 are selected to coincide with f₀: (f₁ + f₂)/2 = (f₁* + f₂*)/2 = f₀. Processing of reflected signal in nonlinear radar consists in separation of partial harmonic component at frequency 2f₀, determining amplitudes A and A* of said component with two radiation modes, respectively, and making a decision on detecting an object of the radio-frequency gain detector by comparing the difference of amplitudes A–A* with the threshold.

EFFECT: technical result is high efficiency of detecting objects of WITN.

1 cl, 3 dwg