Reweighted Covariance Fitting Based on Nonconvex Schatten-p Minimization for Gridless Direction of Arrival Estimation

Table 1

Gridless DoA estimation methods and their comparisons.

Gridless sparse methodology	Methods
Specifications	Atomic norm				Covariance fitting
	AST	[12]	RAM	MRAM	SPA/GLS	CMRA	ICMRA	AML	COMET	CSR	NNM-MUSIC
Need for error bound	√		√			√	√			√	√
Need for model order	√	√							√
Angle separation condition	√	√	√	√	√		√			√	√
Sparsity promoting	√	√	√	√		√	√			√	√
Noise estimation	√				√			√	√
Feasibility to low number of snapshots	√	√	√	√	√
Immunity to sources correlation	√	√	√	√	√
High detection probability in low SNR						√		√	√		√