Radar Working State Recognition Based on Improved HPSO-BP

Algorithm 1

Pseudocode of improved HPSO-BP algorithm.

(1)	Begin
(2)	For () // is the particle population size
(3)	Initialise velocity and position for particle ;
(4)	Calculate the fitness value of particle and set ; // is the individual extreme value
(5) End for
(6)	;// is the group extreme value
(7)	For () // is the maximum number of iterations
(8)	Improve , , and according to equations (6) and (7);
(9)	For ()
(10)	Update and according to equations (1) and (2);
(11)	Apply the crossover and mutation operator to particle according to equations (3)–(5);
(12)	Calculate the fitness value of particle ;
(13)	If ()
(14)	;
(15)	End if
(16)	If ()
(17)	;
(18)	End if
(19)	End for
(20)	End for
(21)	Determine the optimal weight and threshold of the BP neural network according to ;
(22)	While (the training target error is not reached)
(23)	Train the BP neural network;
(24)	End while
(25)	Predict the results on the test set;
(26)	End