Propagator method for direction of arrival estimation based on an array extension of the fourth-order cumulant
Lili Yang · Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University · 2010
An unacceptably large quantity of redundant data enters the cumulant matrix when estimating direction of arrival(DOA)of an impulse with multiple signal classification(MUSIC)-like methods.To solve this problem,a new propagator method for DOA estimation was proposed that combined a fourth order cumulant and a minimum redundancy linear array.Analysis was done on the principle of increasing the virtual array elements based on the fourth order cumulant.The massively redundant data of the fourth-order cumulant matrix in uniform linear arrays can be eliminated by the application of a minimum redundancy linear array.This results in an improved capacity for array expansion.The propagation method,which used a linear operator in place of eigen-decomposition,was used to reduce computational complexity and computing time.Improvements in its ability to extend arrays,in DOA estimation performance and computational speed were illuminated by computer simulations.