METHOD FOR DIRECTION FINDING OF RADIO EMISSION SOURCES Russian patent published in 2023 - IPC G01S3/14 G01S3/74 G01S13/46 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering, in particular to radio direction finding of radio emission sources, and can be used in navigation, direction finding and location radio equipment to determine the location of a priori unknown radio emission sources. In the claimed method, before receiving signals from radio sources, an array of size M×N is formed corresponding to complex directional patterns of channels of the receiving digital antenna array, where N is the number of observation points when constructing directional patterns of the receiving digital antenna array, M is the number of channels of the receiving digital antenna array. They receive signals from radio sources in the space of M channels, form a correlation matrix of input signals and find the inverse correlation matrix of input signals. 2<L<<M vectors of complex weighting coefficients are formed for phasing the receiving digital antenna array in L different phasing directions, while the phasing directions are chosen taking into account that they are located outside the direction finding area of radio sources, and at angular distances not multiples of the width of the side lobes of the receiving digital antenna array, and diffraction lobes were absent in the direction finding area of radio sources. L vectors of complex weighting coefficients of the signal environment are calculated by multiplying the vectors of complex weighting coefficients in L different phasing directions by the inverse correlation matrix of the input signals. L amplitude directional patterns of the receiving digital antenna array are calculated by power, phased in L different directions, by multiplying the corresponding vector of complex weighting coefficients of the signal situation by an array of complex directional patterns of the channels of the receiving digital antenna array. Each of the constructed L amplitude radiation pattern is normalized in power to its value in the direction of phasing and sum up L normalized amplitude radiation patterns in power and form a direction-finding relief in the form of N values inversely proportional to the sum of L normalized amplitude radiation patterns in power.

EFFECT: reduction in the number of operations when constructing a direction-finding relief and narrowing the peaks of the spatial spectrum.

1 cl, 4 dwg, 2 tbl