FIELD: radar ranging.;SUBSTANCE: invention relates to radar ranging and can be used in radar stations for viewing and controlling air traffic, as well as in other coherent radar stations operating in passive interference conditions caused by reflections from local objects, meteorological formations, underlying surface. Said result is achieved by adaptive signal processing in the coherent-pulse radar scans, comprising the vector formation for each digital range reading, the components of which are counts of the reflected signal from the same range element in previous repetition periods, wherein input data vector is divided into m blocks with length of n elements, wherein each data unit is filtered by a system of orthogonal filters, dispersion of noise at the output of the filters is calculated and stored in n interference maps for each range element and azimuth, the outputs of the filters are normalized with data of the corresponding interference maps at the previous viewing moment, to account for Doppler frequency increment of moving target, filter outputs are corrected taking into account characteristics of filters and shape of antenna pattern, results of processing input data vector blocks are combined and coherently accumulated using a fast Fourier transform algorithm, then calculating a square of the spectrum module which is compared to the detection threshold in each Doppler channel. If the Doppler frequency of the target is not to be measured, the square of the module output of each block is calculated, normalized with a square polynomial from the interference map data at the previous viewpoint, the results of processing all the blocks are summed up and compared with the detection threshold.;EFFECT: high efficiency of target detection.;2 cl, 8 dwg
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