METHOD FOR DIGITAL SIGNAL PROCESSING IN SURVEILLANCE MONOPULSE AMPLITUDE INTEGRAL-DIFFERENTIAL DIRECTION FINDING USING ANTENNA ARRAY (VERSIONS) AND SURVEILLANCE MONOPULSE AMPLITUDE INTEGRAL-DIFFERENTIAL DIRECTION FINDER USING ANTENNA ARRAY AND DIGITAL SIGNAL PROCESSING Russian patent published in 2016 - IPC G01S3/14 H01Q25/02 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in systems of monopulse radar and radio direction-finding using antenna array and digital signal processing. To achieve technical result according to the first version, before receiving signals simulation of their reception and processing is performed, where Hamming weight function is used providing appropriate level of side lobes and further determined value of displacement angle, width of working finding zone with at least double beam width of partial channel at the level of half-power, during simulation specific type of functions is determined based on weight function and parameters of antenna array, these functions parametrically depend on displacement angle, one decomposes odd function describing direction-finding characteristic at uneven degrees of current angle in Maclaurin expansion, determine preliminary value of displacement angle, calculate final value of displacement angle, weight function used during simulation and displacement angle value defined after simulation are used when forming array patterns, value of mismatch signal is obtained and value of signal arrival angle of radio-frequency is calculated appropriately. To achieve technical result according to the second version, final value of displacement angle is determined as a result of task solving, ensuring compliance of direction-finding characteristic of cubic function with deviation only in the seventh and higher orders of decomposition, then weight function used in simulating and displacement angle value defined as a result of simulation are used when forming array pattern, receiving and processing signal, to obtain mismatch signal value, followed by calculating value of signal arrival angle of radio-frequency source in a certain manner. Example of implementing methods according to the first and second versions is surveillance monopulse amplitude integral-differential direction finder using antenna array and digital signal processing in a certain manner.

EFFECT: technical effect consists in improvement of accuracy and speed up to determine angle of signal arrival at its single implementation.

3 cl, 6 dwg