Research On DOA Estimation Of Polarization Array Signal In The Background Of Alpha Stable Noise

The Direction-of-Arrival(DOA)estimation has always been a hot topic in the field of array signal processing,and it has been widely used in radar,sonar,radio communication,acoustic wave detection and medical research.Recently,a large number of DOA estimation methods based on alpha noise have been proposed one after another.Most of these methods are improved on the basis of MUSIC algorithm.Although it can effectively suppres ? noise,it is also accompanied by the problems of large computation and long calculation time.Hence,it is of great theoretical and practical value to study a DOA estimation method which can improve the speed of parameter estimation and reduce the computational cost of the algorithm.This paper takes the ? noise as the background,takes the electromagnetic vector sensor array multi-parameter estimation as the research goal,in order to improve the speed of the array signal DOA and polarization parameter estimation,and reduce the computational cost of the algorithm,various DOA parameter estimation algorithms are studied for different polarization array structures and signal characteristics.The low-order fractional statistical MUSIC based on sequence quadratic programming and the low-order fractional cyclic correlation MUSIC algorithm based on sequence quadratic programming are proposed for single electromagnetic vector sensor DOA and polarization parameter estimation.Secondly,the low-order fractional statistical MUSIC based on sequence quadratic programming and the low-order fractional cyclic correlation MUSIC based on sequence quadratic programming are proposed for linear polarization array DOA and polarization parameter estimation problems widely used in practical engineering.Finally,the DOA of polarization array and the estimation of polarization parameters of arbitrary structures with more universality are presented.fractional low-order statistical MUSIC of quadratic programming and fractional low-order cyclic correlation MUSIC algorithm based on sequential quadratic programming.The theoretical derivation and simulation verification show that the DOA and polarization parameter estimation method studied in this paper with ?noise as the background can effectively suppress the ? noise,greatly reduce the calculation amount of the algorithm,and improve the calculation speed of the algorithm,which has high theoretical value and practical engineering significance.