test_am2.m

通信系统的matlab仿真程序

function [ret,x0,str,ts,xts]=test_am2(t,x,u,flag);
%TEST_AM2	is the M-file description of the SIMULINK system named TEST_AM2.
%	The block-diagram can be displayed by typing: TEST_AM2.
%
%	SYS=TEST_AM2(T,X,U,FLAG) returns depending on FLAG certain
%	system values given time point, T, current state vector, X,
%	and input vector, U.
%	FLAG is used to indicate the type of output to be returned in SYS.
%
%	Setting FLAG=1 causes TEST_AM2 to return state derivatives, FLAG=2
%	discrete states, FLAG=3 system outputs and FLAG=4 next sample
%	time. For more information and other options see SFUNC.
%
%	Calling TEST_AM2 with a FLAG of zero:
%	[SIZES]=TEST_AM2([],[],[],0),  returns a vector, SIZES, which
%	contains the sizes of the state vector and other parameters.
%		SIZES(1) number of states
%		SIZES(2) number of discrete states
%		SIZES(3) number of outputs
%		SIZES(4) number of inputs
%		SIZES(5) number of roots (currently unsupported)
%		SIZES(6) direct feedthrough flag
%		SIZES(7) number of sample times
%
%	For the definition of other parameters in SIZES, see SFUNC.
%	See also, TRIM, LINMOD, LINSIM, EULER, RK23, RK45, ADAMS, GEAR.

% Note: This M-file is only used for saving graphical information;
%       after the model is loaded into memory an internal model
%       representation is used.

% the system will take on the name of this mfile:
sys = mfilename;
new_system(sys)
simver(1.3)
if (0 == (nargin + nargout))
     set_param(sys,'Location',[492,385,992,548])
     open_system(sys)
end;
set_param(sys,'algorithm',     'RK-45')
set_param(sys,'Start time',    '0.0')
set_param(sys,'Stop time',     '999')
set_param(sys,'Min step size', '0.0001')
set_param(sys,'Max step size', '10')
set_param(sys,'Relative error','1e-3')
set_param(sys,'Return vars',   '')
set_param(sys,'Load callback','ts=.01;[num,den]=butter(2,100/pi/2*ts);');

add_block('built-in/Mux',[sys,'/','Mux'])
set_param([sys,'/','Mux'],...
		'hide name',0,...
		'inputs','3',...
		'position',[390,28,425,82])


%     Subsystem  'Graph'.

new_system([sys,'/','Graph'])
set_param([sys,'/','Graph'],'Location',[0,59,274,252])

add_block('built-in/Inport',[sys,'/','Graph/x'])
set_param([sys,'/','Graph/x'],...
		'position',[65,55,85,75])

add_block('built-in/S-Function',[sys,'/',['Graph/S-function',13,'M-file which plots',13,'lines',13,'']])
set_param([sys,'/',['Graph/S-function',13,'M-file which plots',13,'lines',13,'']],...
		'function name','sfuny',...
		'parameters','ax, color,dt',...
		'position',[130,55,180,75])
add_line([sys,'/','Graph'],[90,65;125,65])
set_param([sys,'/','Graph'],...
		'Mask Display','plot(0,0,100,100,[90,10,10,10,90,90,10],[65,65,90,40,40,90,90],[90,78,69,54,40,31,25,10],[77,60,48,46,56,75,81,84])',...
		'Mask Type','Graph scope.')
set_param([sys,'/','Graph'],...
		'Mask Dialogue','Graph scope using MATLAB graph window.\nEnter plotting ranges and line type.|Time range:|y-min:|y-max:|Line type (rgbw-:*). Seperate each plot by ''/'':|Sample time:')
set_param([sys,'/','Graph'],...
		'Mask Translate','color = @4; ax = [0, @1, @2, @3]; dt = @5;')
set_param([sys,'/','Graph'],...
		'Mask Help','This block plots to the MATLAB graph window and can be used as an improved version of the Scope block. Look at the m-file sfuny.m to see how it works. This block can take scalar or vector input signal.')
set_param([sys,'/','Graph'],...
		'Mask Entries','4\/-1.5\/1.5\/''y-/g--/r-/m:/w-/r:/b+''\/ts\/')


%     Finished composite block 'Graph'.

set_param([sys,'/','Graph'],...
		'hide name',0,...
		'position',[445,36,475,74])


%     Subsystem  ['DSB-SC AM',13,'passband'].

new_system([sys,'/',['DSB-SC AM',13,'passband']])
set_param([sys,'/',['DSB-SC AM',13,'passband']],'Location',[103,459,555,641])

add_block('built-in/Sum',[sys,'/',['DSB-SC AM',13,'passband/Sum2']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Sum2']],...
		'position',[170,90,190,110])

add_block('built-in/Fcn',[sys,'/',['DSB-SC AM',13,'passband/Fcn']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Fcn']],...
		'Expr','cos(u[1])',...
		'position',[205,85,265,115])

add_block('built-in/Constant',[sys,'/',['DSB-SC AM',13,'passband/Constant1']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Constant1']],...
		'Value','Ph',...
		'position',[60,115,100,145])

add_block('built-in/Inport',[sys,'/',['DSB-SC AM',13,'passband/in_1']])
set_param([sys,'/',['DSB-SC AM',13,'passband/in_1']],...
		'position',[205,20,225,40])

add_block('built-in/Outport',[sys,'/',['DSB-SC AM',13,'passband/out_1']])
set_param([sys,'/',['DSB-SC AM',13,'passband/out_1']],...
		'position',[380,50,400,70])

add_block('built-in/Product',[sys,'/',['DSB-SC AM',13,'passband/Product']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Product']],...
		'position',[340,42,365,73])

add_block('built-in/Clock',[sys,'/',['DSB-SC AM',13,'passband/Clock']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Clock']],...
		'position',[20,65,40,85])

add_block('built-in/Gain',[sys,'/',['DSB-SC AM',13,'passband/Gain']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Gain']],...
		'Gain','Fc',...
		'position',[70,56,120,94])

add_block('built-in/Zero-Order Hold',[sys,'/',['DSB-SC AM',13,'passband/Zero-Order',13,'Hold',13,'timing control']])
set_param([sys,'/',['DSB-SC AM',13,'passband/Zero-Order',13,'Hold',13,'timing control']],...
		'Sample time','ts',...
		'position',[50,219,85,251])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[195,100;200,100])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[105,130;130,130;130,105;165,105])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[125,75;150,75;150,95;165,95])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[45,75;65,75])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[230,30;270,30;270,50;335,50])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[370,60;375,60])
add_line([sys,'/',['DSB-SC AM',13,'passband']],[270,100;270,65;335,65])
set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);DSB AM',...
		'Mask Type','Passband DSB-SC AM')
set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'Mask Dialogue','Modulate the input signal using\nDSB-SC AM method.|Carrier frequency (Hz):|Initial Phase (rad):|Sample time (sec):')
set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'Mask Translate','Fc=@1;Fc=Fc*2*pi;Ph=@2;ts=@3;[x,y]=moduicon(1);')
set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'Mask Help','This block modulates the input signal using the double-sideband suppressed-carrier amplitude modulation. In general, the carrier frequency should be much higher than the message signal frequency.')
set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'Mask Entries','100/2/pi\/pi/2\/ts\/')


%     Finished composite block ['DSB-SC AM',13,'passband'].

set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'ForeGround',3,...
		'hide name',0,...
		'position',[120,33,200,77])


%     Subsystem  ['DSB-SC-ADM',13,'passband'].

new_system([sys,'/',['DSB-SC-ADM',13,'passband']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband']],'Location',[588,690,716,690])

add_block('built-in/Outport',[sys,'/',['DSB-SC-ADM',13,'passband/In-phase',13,'output']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/In-phase',13,'output']],...
		'position',[695,50,715,70])

add_block('built-in/Filter',[sys,'/',['DSB-SC-ADM',13,'passband/Filter1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Filter1']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[425,206,480,244])

add_block('built-in/Filter',[sys,'/',['DSB-SC-ADM',13,'passband/Filter']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Filter']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[340,41,395,79])

add_block('built-in/Fcn',[sys,'/',['DSB-SC-ADM',13,'passband/sin']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/sin']],...
		'orientation',2,...
		'Expr','2*cos(u[1])',...
		'position',[125,118,210,142])

add_block('built-in/Note',[sys,'/',['DSB-SC-ADM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp69']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp69']],...
		'position',[260,350,265,355])

add_block('built-in/Inport',[sys,'/',['DSB-SC-ADM',13,'passband/in_1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/in_1']],...
		'position',[45,45,65,65])

add_block('built-in/Product',[sys,'/',['DSB-SC-ADM',13,'passband/Product']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Product']],...
		'position',[125,50,150,70])

add_block('built-in/Fcn',[sys,'/',['DSB-SC-ADM',13,'passband/sin1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/sin1']],...
		'orientation',2,...
		'Expr','-2*sin(u[1])',...
		'position',[115,167,220,193])

add_block('built-in/Product',[sys,'/',['DSB-SC-ADM',13,'passband/Product2']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Product2']],...
		'position',[125,215,150,235])

add_block('built-in/Sum',[sys,'/',['DSB-SC-ADM',13,'passband/Sum1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Sum1']],...
		'orientation',2,...
		'position',[265,120,285,140])

add_block('built-in/Constant',[sys,'/',['DSB-SC-ADM',13,'passband/Carrier',13,'frequency1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Carrier',13,'frequency1']],...
		'orientation',2,...
		'Value','Ph',...
		'position',[320,175,340,195])

add_block('built-in/Gain',[sys,'/',['DSB-SC-ADM',13,'passband/Gain1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Gain1']],...
		'orientation',2,...
		'Gain','pi2',...
		'position',[310,110,340,140])

add_block('built-in/Sum',[sys,'/',['DSB-SC-ADM',13,'passband/Sum']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Sum']],...
		'orientation',2,...
		'position',[440,115,460,135])

add_block('built-in/Filter',[sys,'/',['DSB-SC-ADM',13,'passband/Filter2']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Filter2']],...
		'orientation',2,...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[535,100,595,140])

add_block('built-in/Product',[sys,'/',['DSB-SC-ADM',13,'passband/Product1']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Product1']],...
		'orientation',2,...
		'position',[610,110,640,130])

add_block('built-in/Constant',[sys,'/',['DSB-SC-ADM',13,'passband/Carrier',13,'frequency']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Carrier',13,'frequency']],...
		'orientation',2,...
		'Value','Fc',...
		'position',[510,165,530,185])


%     Subsystem  ['DSB-SC-ADM',13,'passband/Dis module',13,'integrator'].

new_system([sys,'/',['DSB-SC-ADM',13,'passband/Dis module',13,'integrator']])
set_param([sys,'/',['DSB-SC-ADM',13,'passband/Dis module',13,'integrator']],'Location',[40,403,515,507])