To research the application and estimate performance in some small-scale vector sensor array by traditional direction
of arrival estimate , we derivate the time delay expression of four small-scale non-uniform vector sensor array, the array
direction vector is given, and the MUSIC algorithm is applied successfully to non-uniform vector array for direction of
arrival(DOA) estimate, select the better performance of each array element setting method, and compare of beam
forming, the probability of success and the mean square error, this shows that the performance of line array is best,
followed by L-array and circular array, the performance of cross-array is worst.