Fast Subspace Algorithm for 2-D Direction Finding Based on Arbitrary Antenna Array

In order to locate the radiant sources accurately,a mathematic model was established for arbitrary antenna array to estimate 2-D DOA of multiple sources.The MUSIC algorithm can be used to estimate the DOA of radiant sources precisely based on three-dimensional space antenna array.But it involves estimating the covariance matrix of observed data and its eigendecomposition,it has more computational complexity.Utilizing the forward recursion of the multi-stage wiener filter(MSWF),we can get the signal and noise subspace,avoiding the estimation of the covariance matrix and eigendecomposition,and so the computational complexity is reduced.The method is used to estimate the 2-D DOA based on arbitrary space array,compute simulations and experimental results in practical system are given to demonstrate the efficiency of the proposed method.