DIFFERENCE-RANGE-FINDING METHOD FOR DETERMINING COORDINATES OF A RADIO-FREQUENCY SOURCE (VERSIONS) AND A DEVICE FOR REALIZING SAID Russian patent published in 2021 - IPC G01S5/06 G01S3/46 G01S3/72 

FIELD: radio equipment.

SUBSTANCE: group of inventions relates to radio engineering and can be used in multi-position radio systems for determining coordinates of preset sources of radio emission (RES) with code and time division of channels. Technical result in the first difference-range-finding method (DRM) is achieved due to the fact that at the preparatory stage the controlled region (CR) is divided into equal initial elementary volumes (EV) with sides a, b and c, coordinates of centers of initial EVs (X_i, Y_j, Z_k) are determined, on the basis of which a three-dimensional matrix of coordinates P is formed. For each element (X_i, Y_j, Z_k) of matrix P and all N measurement bases, reference values of time difference arrival of signal to central reception and processing point (CRPP) and n-th peripheral receiving point (PRP_n) τ_i,j,k,n. On their basis form N reference matrices M_n, n=1, 2, …, N, and during operation, calculating a cross correlation function (CCF) of signals R_n[τ], received on n-th PRP and CRPP and their average values for each source EV on time interval where s is the time at which the radio wave passes a distance equal to the diagonal of the original EV. N correlation matrices Φ_n are formed by replacing τ_i,j,k,n to their respective measured values values of the last are summed over all N measurement bases determining the preliminary location of RES with coordinates (X_i, Y_j, Z_k) corresponding to the maximum value of the element of the measurement matrix Specifying the specified CR with sides a, b and c and center (X_i, Y_j, Z_k), dividing the specified CR by EV with sides a', b' and c', a' << a, b' << b, c' << c, coordinates of their centers are determined, forming a specified matrix of coordinates P' and N refined reference matrices average values CCF are measured for each specified EV, N specified correlation matrices and specified measurement matrix are formed and determining most probable coordinates of preset RES, value of which corresponds to maximum value of element of specified matrix of measurements Positive result in the second DRM, which improves characteristics of the first DRM, is achieved by determining the required number of CR detailing steps, calculating all reference parameters of time intervals s, s' n s" for them. Technical result in device is achieved due to introduction of new elements in central processing station: second computer, unit for generating matrix of coordinates P, unit for generating reference matrices M_n, adder, unit for generating correlation matrices Φ_n, decision making unit and comparator with corresponding relationships.

EFFECT: reduced time expenditures for determining the location of a given RES while maintaining accuracy characteristics in multipathing conditions and operation of multiple RES with time or code division of channels at one frequency.

5 cl, 22 dwg, 1 tbl