Abstract：To increase signal number distinguished by traditional MUSIC algorithm, this paper proposes a MUSIC algorithm based on three-dimensional smoothing by a coprime pair of two-dimensional sparse electromagnetic vector arrays. The coprime relationship between two arrays is used in the algorithm to generate a coprime co-array with more degrees of freedom. And the rank of its autocorrelation matrix is restored by three-dimensional (two-dimensional spatial domain and polarization domain) smoothing algorithm in order to apply to the traditional MUSIC algorithm. A major advantage of this method is that the freedom of the original array is also systematically increased by even using second-order statistics. Computer simulation results show that the proposed algorithm can estimate the number of signals more than the number of physical array elements and have high resolution.
2012, Vol. 34 
