Unitary Transformation DOA Estimation Algorithm Based on High - order Cumulant
Bingxia Cao · Jisuanji fangzhen · 2010
At present,pre-processing should be done by using the pattern space algorithm when the unitary transformation is applied for the odd array element of uniform circular array.However,too many elements are needed in the pattern space algorithm.And only 1-dimensional search can be operated according to special elevation angle under the combination with unitary transformation.Aiming at the problem,the high-order cumulant algorithm is pro-posed to do preprocessing based on the array receiving data.And then the high-order cumulant matrix is realvalued using the unitary transformation algorithm.Compared with the pattern space algorithm,this method can decrease the demand to element number and can do 2-dimensional spectrum peak search.Compared with the classical MUSIC algorithm,the resolution is improved without increasing computation cost of eigenvalue-decomposition and spectrum peak search.The algorithm principle is given and the conclusion is verified using simulation experiments.