Protection of coherent pulse radars against combined interferences. 4. Adaptive systems of space-time signal coprocessing against background of combined interference based on two-dimensional ALF
DOI:
https://doi.org/10.3103/S0735272722070019Abstract
This is the fourth paper in a series of articles devoted to modern methods of protection of coherent-pulse radars against the combined interference (i.e., an additive mixture of internal noise, masking noise jamming and clutter). It proposes the structures of an adaptive system of cooperative space-time signal processing (STSP) against the background of masking combined interference based on a two-dimensional adaptive lattice filter with matrix elementary lattice filters. These structures eliminate significant energy losses of adaptive systems of separate STSP caused by the non-classified nature of training samples of noise jamming and clutter in estimating the weight vectors of spatial and inter-period signal processing and the need to store the spatial weight vector during the time of inter-period compensation of clutter. The results of mathematical simulation of the developed parallel-sequential adaptive system of cooperative STSP with reduced number of complex multiplication operations as compared with direct inversion of interference correlation matrix are presented that confirm its high efficiency.
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![Two-dimensional lattice filter (n1 = 4, n2 = 5)](https://radioelektronika.org/public/journals/16/submission_284105_322327_coverImage_en_US.png)