Analysis of performance of DOA estimation based on partial noise subspace
Yan Jian-hong · Modern Electronics Technique · 2013
The principle of MUSIC algorithm based on the subspace DOA estimation is to use the noise subspace orthogo nal to signal component to estimate the direction of the signal wave,throught eigen decomposition of the covariance matrix with array output data.However,before the spectrum estimation,the number of the signal source should be estimated to determine the dimensions of the signal subspace and noise subspace,Which would increase the complexity of DOA estimation.The paper illustrates the method of using the partial noise subspace to estimate the DOA.As the estimation of the signal number is unneces sary,the complexity of the spectrum estimation is reduced.The simulation and performance analysis demonstrate the validity and feasibility of the partial noise algorithm.