SUMMARY
Context. Under simultaneous actions of the active noise and passive interference, the latter de-correlates the active component ofthe combined interference, which significantly limits its compensation. In addition, when the active interference acts on the sidelobes of the antenna pattern when scanning a spaced-apart antenna system, inter-channel delays of interfering signals occur, whichalso leads to the degradation of compensation.Objective. Improving the efficiency of compensation of the active component of the combined interference acting on the sidelobes of the radiation pattern under simultaneous effect of the passive interference.Method. An improved algorithm for processing radar signals with direct calculation of the weight factor of the adaptive spatialfilter and matched filtering of the signals of the main and compensation channels. The effect of passive interference on the process ofadapting the weight factor of the spatial filter is eliminated using notch filters.Results. A block diagram of an improved spatial filter has been developed. A mathematical model has been created. In the processof simulation, it was found that the proposed algorithm for processing radar signals in the side-lobe sector of the antenna pattern[3°–30°] relative to the main beam provided a gain in the compensation of active noise interference of about 6.0 to 6.4 dB as comparedto the known adaptive spatial filter circuit.Conclusions. The scientific novelty of the work is in improving of the algorithm for processing radar signals by parallel calculationof the weight factor of the spatial filter using notch filters and matched filtering of the signals of the main and compensationchannels.The practical novelty consists of creating a structural scheme and a mathematical model of an improved adaptive spatial filter.The simulation results confirmed the relatively high efficiency of the proposed radar signal-processing algorithm. The results obtainedcan be used in the design or modernization of radars for various purposes.