Computationally Efficient Compressed Sensing-Based Method via FG Nyström in Bistatic MIMO Radar with Array Gain-Phase Error Effect

Algorithm 1

Fast greedy Nyström SOMP with gain-phase error estimation algorithm.

(1)	Data entry: target number K, dictionary matrix receiver signal H, and step function
(2)	System initialization: iteration i = 0, assuming, number of iterations L.
(3)	While do
(4)	Disintegrate H into submatrices using equation (6)
(5)	Compute the value for Q antennas for the submatrices in equation (9).
(6)	Compute estimates of and using equations (10) and (11).
(7)	Obtain approximated signal using equation (12) and transform into sparse domain using equation (17).
(8)	Compute estimated sparse matrix using Algorithm 2.
(9)
(10)	Compute and using equations (23) and (24)
(11)	,
(12)	Update the elements of , with the exception of the maximum
(13)	End while
(14)	Output: target angles
(15)	End