A Two-Step Compressed Sensing Approach for Single-Snapshot DOA Estimation of Closely Spaced Signals

Algorithm 1

The one-step CS-based algorithm.

	Input:
	The observed single-snapshot signal ;
	The measurement matrix ;
	Output:
	The DOA estimator, ;
(1)	Divide the initial search space into parts to construct the overcomplete dictionary matrix .
(2)	Generate the measured signal and the sensing matrix .
(3)	Calculate the DOA estimator using the OMP method in [40].
(4)	return.