A method and system for adaptive nulling DOA estimation in a polar impulse noise environment

Abstract

The application discloses a kind of polar pulse noise environment under adaptive null DOA estimation method and system, the method includes: obtaining the signal received by null array, the null array is uniform linear array, wherein the first array sensor is reference element, other array sensors are auxiliary elements;In the lth snapshot, input the signal received by auxiliary element in null array and the signal received by reference element, initialize relevant parameters;Operation iteration is carried out to obtain null array auxiliary element weight vector, in each round of iteration, according to null array error signal update parameter, and according to variable step size update auxiliary element weight vector;The reciprocal of array directivity pattern is defined as spatial spectrum to obtain azimuth spectrum, according to azimuth spectrum, the orientation of target is estimated.The application has higher DOA estimation accuracy and lower computational complexity in polar pulse noise environment, without knowing the number of signal sources, conducive to engineering implementation and application.

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