Phaseless Spherical Near-Field to Far-Field Transformation Algorithm via Sparsity of Spherical Mode Coefficients

Algorithm 2

The process of solving the suboptimization problem.

(1)	Input: initial estimation , maximum iterations , ,
(2)	while do
(3)
(4)	ifthen
(5)	stop iteration, output
(6)	else
(7)	calculate the step size according to (22)
(8)	update the composite vector
(8)
(9)	end if
(10)	end while