Novel Approach to 2D DOA Estimation for Uniform Circular Arrays Using Convolutional Neural Networks

Table 1

Mathematical notations.

Notations	Explanations
(·)^T	Transpose
(·)^H	Conjugate transpose
I	Identity matrix
E{·}	Expectation operator
Re(·)	Real part operator
Im(·)	Imaginary part operator
‖·‖1	L1 norm of a matrix
{A: B: C}	A set from A to C (B step)
Abs(·)	Absolute value operator
Min(·)	Minimum value operator
Toeplitz (·)	Toeplitz matrix operator
Diag(·)	Diagonal matrix operator