Modified wide-band signal DOA finding method based on the 4~(th)-order cumulant slice modified propagator matrix
Li Gang · Systems engineering and electronics · 2007
Using the 4th-order cumulant's blindness to Gaussian noise,the performance of DOA estimation is improved.The matrix which is called the 4th-order cumulant slice is derived from the 4th-order cumulant.Based on the 4th-order cumulant slice,which retains the peculiarity of Gaussian noise blindness,the modified propagator matrix method(MPM) is used to reduce the computational complexity and gain a better estimation result in DOA.First all the subspaces' signals are focused,and then the 4th-order cumulant slice and MPM are applied to the output of focus.The basic principles of the method proposed is discussed,and then the performance of the method is illuminated by simulations.