Central DOA Estimation Method for Exponential-Type Coherent Distributed Source Based on Fourth-Order Cumulant

Table 1

Key notations and explanations.

Notations	Explanation
	Conjugate of matrix
	Transpose of matrix
	Conjugate transpose of the matrix
	Statistical expectation operator
	Diagonalization operation
	-th entry of a matrix
	Matrix trace
	Kornecker product
	Set of the locations of physical elements
	Set of the locations of virtual elements
	Phase acquired operation
	Matrix column vectorization