FIELD: physics.
SUBSTANCE: method for adaptive spatial compensation of noise during monopulse amplitude total-differential direction finding, involving reception of signals from the current viewing direction using an antenna system with integral (with number j=1), azimuth differential (with number j=2), elevation angle differential (with number j=3) channels and antennae q=1,2,…,Q of compensation channels, coordinated processing of signals of each channel using Q+3 identical receiving channels, analogue-to-digital conversion of signals of each receiving channel and processing digitised signals of each channel in the device for generating resultant signals and calculating bearings by calculating vectors of weight coefficients of the integral, azimuth differential and elevation angle differential channels and weighted summation of signals of the integral and compensation, azimuth differential and compensation and elevation angle differential and compensation channels, characterised by that to calculate the vector of weighted coefficients, a constraint matrix is formed first on the form of the resultant beam pattern of the integral, azimuth differential and elevation angle differential channels for all possible viewing directions in form of readings of values of the beam pattern of the integral, azimuth differential, elevation angle differential and compensation channels at r=1,2,…,R points of limitation. For an odd number of points of limitation, one of them lies in the given viewing direction and the rest lie symmetrically about it and direction finding planes; for an even number of points of limitation, their positions lie symmetrically about the viewing direction and direction finding planes; deviation of points of limitation from the viewing direction are selected based on the minimum root-mean-square value of offset of the estimate of angular coordinates of the signal whose direction is to be found for expected distributions of values of angular coordinates of the arrival directions and power of the signal whose direction is to be found and noise; the constraint matrices are stored in memory for constraint matrices, and when processing digitised signals of each channel, covariance matrices of the integral, azimuth differential, elevation angle differential and compensation channels are formed; values of constraint matrices of the integral, azimuth differential and elevation angle differential channels for the current viewing direction are read from the memory for constraint matrices, and vectors of the weight coefficients of the integral, azimuth differential and elevation angle differential channels are formed based on the constraint matrices in accordance with a certain expression.
EFFECT: high accuracy of direction finding.
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