Reduced-Complexity Direction of Arrival Estimation Using Real-Valued Computation with Arbitrary Array Configurations

Table 1

Mathematical notations.

	Noise power
	Transpose
	Conjugation
	Hermitian transpose
	Round down to integer
	Frobenius norm
	Mathematical expectation
	Real part of the embraced element
	Imaginary part of the embraced element
	Zero matrix (vector)
	identity matrix
	Dirac delta function
	Rank of the embraced matrix
	Column space of the embraced matrix
	Diagonal matrix composed of the embraced elements