tstfdma.m

数字通信第四版原书的例程

function [ret,x0,str,ts,xts]=tstfdma(t,x,u,flag);
%TSTFDMA	is the M-file description of the SIMULINK system named TSTFDMA.
%	The block-diagram can be displayed by typing: TSTFDMA.
%
%	SYS=TSTFDMA(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 TSTFDMA 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 TSTFDMA with a FLAG of zero:
%	[SIZES]=TSTFDMA([],[],[],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',[11,61,896,319])
     open_system(sys)
end;
set_param(sys,'algorithm',     'RK-45')
set_param(sys,'Start time',    '0.0')
set_param(sys,'Stop time',     '4')
set_param(sys,'Min step size', '0.0001')
set_param(sys,'Max step size', '.1')
set_param(sys,'Relative error','1e-3')
set_param(sys,'Return vars',   '')
set_param(sys,'Load callback','F0=50;F2=80;F4=110;ts=.002;[num0,den0]=butter(2,F0/2*ts);[num4,den4]=butter(2,F4/2*ts);[num2,den2]=butter(2,F2/2*ts);');

add_block('built-in/Signal Generator',[sys,'/',['Signal',13,'generator']])
set_param([sys,'/',['Signal',13,'generator']],...
		'ForeGround',5,...
		'hide name',0,...
		'Peak','1.000000',...
		'Peak Range','5.000000',...
		'Freq','4.000000',...
		'Freq Range','5.000000',...
		'Wave','Sqr',...
		'Units','Rads')
set_param([sys,'/',['Signal',13,'generator']],...
		'position',[35,48,80,82])

add_block('built-in/Discrete State-Space',[sys,'/',['Butterworth',13,'IIR BP Filter2']])
set_param([sys,'/',['Butterworth',13,'IIR BP Filter2']],...
		'hide name',0,...
		'A','a',...
		'B','b',...
		'C','c',...
		'D','d',...
		'Sample time','ts',...
		'Mask Display','plot(1:64,abs(h))',...
		'Mask Type','butter(BP)')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter2']],...
		'Mask Dialogue','Butterworth band pass filter.\n(Requires Signal Processing Toolbox)|Center frequency (0 to 1):|Bandwidth (0 to 1):|Order:|Sample time:')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter2']],...
		'Mask Translate','bw = @2/2; [a,b,c,d]=butter(@3,[@1-bw,@1+bw] ); ts=@4; [num,den]=ss2tf(a,b,c,d,1); if (@3 <= 8), [a,b,c,d]=tf2ss(num,den); end; h=freqz(num,den,64); ')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter2']],...
		'Mask Help','IIR Butterworth band pass filter using MATLAB''s butter command.',...
		'Mask Entries','F2*ts*2\/0.05\/7\/ts\/',...
		'position',[250,113,320,147])

add_block('built-in/Sum',[sys,'/','Sum'])
set_param([sys,'/','Sum'],...
		'inputs','+++',...
		'position',[355,112,375,148])

add_block('built-in/Discrete State-Space',[sys,'/',['Butterworth',13,'IIR BP Filter3']])
set_param([sys,'/',['Butterworth',13,'IIR BP Filter3']],...
		'hide name',0,...
		'A','a',...
		'B','b',...
		'C','c',...
		'D','d',...
		'Sample time','ts',...
		'Mask Display','plot(1:64,abs(h))',...
		'Mask Type','butter(BP)')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter3']],...
		'Mask Dialogue','Butterworth band pass filter.\n(Requires Signal Processing Toolbox)|Center frequency (0 to 1):|Bandwidth (0 to 1):|Order:|Sample time:')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter3']],...
		'Mask Translate','bw = @2/2; [a,b,c,d]=butter(@3,[@1-bw,@1+bw] ); ts=@4; [num,den]=ss2tf(a,b,c,d,1); if (@3 <= 8), [a,b,c,d]=tf2ss(num,den); end; h=freqz(num,den,64); ')
set_param([sys,'/',['Butterworth',13,'IIR BP Filter3']],...
		'Mask Help','IIR Butterworth band pass filter using MATLAB''s butter command.',...
		'Mask Entries','F4*ts*2\/0.05\/7\/ts\/',...
		'position',[250,183,320,217])

add_block('built-in/Signal Generator',[sys,'/',['Signal',13,'generator1']])
set_param([sys,'/',['Signal',13,'generator1']],...
		'ForeGround',3,...
		'hide name',0,...
		'Peak','1.000000',...
		'Peak Range','5.000000',...
		'Freq','3.000000',...
		'Freq Range','5.000000',...
		'Wave','Saw',...
		'Units','Rads')
set_param([sys,'/',['Signal',13,'generator1']],...
		'position',[35,113,80,147])

add_block('built-in/Signal Generator',[sys,'/',['Signal',13,'generator2']])
set_param([sys,'/',['Signal',13,'generator2']],...
		'ForeGround',2,...
		'hide name',0,...
		'Peak','1.000000',...
		'Peak Range','5.000000',...
		'Freq','2.000000',...
		'Freq Range','5.000000',...
		'Wave','Sin',...
		'Units','Rads')
set_param([sys,'/',['Signal',13,'generator2']],...
		'position',[35,183,80,217])


%     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','F0\/0\/ts\/')


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

set_param([sys,'/',['DSB-SC AM',13,'passband']],...
		'hide name',0,...
		'position',[140,43,220,87])


%     Subsystem  ['DSB-SC AM',13,'passband1'].

new_system([sys,'/',['DSB-SC AM',13,'passband1']])
set_param([sys,'/',['DSB-SC AM',13,'passband1']],'Location',[103,459,555,641])

add_block('built-in/Zero-Order Hold',[sys,'/',['DSB-SC AM',13,'passband1/Zero-Order',13,'Hold',13,'timing control']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Zero-Order',13,'Hold',13,'timing control']],...
		'Sample time','ts',...
		'position',[50,219,85,251])

add_block('built-in/Gain',[sys,'/',['DSB-SC AM',13,'passband1/Gain']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Gain']],...
		'Gain','Fc',...
		'position',[70,56,120,94])

add_block('built-in/Clock',[sys,'/',['DSB-SC AM',13,'passband1/Clock']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Clock']],...
		'position',[20,65,40,85])

add_block('built-in/Product',[sys,'/',['DSB-SC AM',13,'passband1/Product']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Product']],...
		'position',[340,42,365,73])

add_block('built-in/Outport',[sys,'/',['DSB-SC AM',13,'passband1/out_1']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/out_1']],...
		'position',[380,50,400,70])

add_block('built-in/Inport',[sys,'/',['DSB-SC AM',13,'passband1/in_1']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/in_1']],...
		'position',[205,20,225,40])

add_block('built-in/Constant',[sys,'/',['DSB-SC AM',13,'passband1/Constant1']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Constant1']],...
		'Value','Ph',...
		'position',[60,115,100,145])

add_block('built-in/Fcn',[sys,'/',['DSB-SC AM',13,'passband1/Fcn']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Fcn']],...
		'Expr','cos(u[1])',...
		'position',[205,85,265,115])

add_block('built-in/Sum',[sys,'/',['DSB-SC AM',13,'passband1/Sum2']])
set_param([sys,'/',['DSB-SC AM',13,'passband1/Sum2']],...
		'position',[170,90,190,110])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[270,100;270,65;335,65])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[370,60;375,60])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[230,30;270,30;270,50;335,50])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[45,75;65,75])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[125,75;150,75;150,95;165,95])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[105,130;130,130;130,105;165,105])
add_line([sys,'/',['DSB-SC AM',13,'passband1']],[195,100;200,100])
set_param([sys,'/',['DSB-SC AM',13,'passband1']],...
		'Mask Display','plot(0,0,100,100,x,y);DSB AM',...
		'Mask Type','Passband DSB-SC AM')
set_param([sys,'/',['DSB-SC AM',13,'passband1']],...
		'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,'passband1']],...
		'Mask Translate','Fc=@1;Fc=Fc*2*pi;Ph=@2;ts=@3;[x,y]=moduicon(1);')
set_param([sys,'/',['DSB-SC AM',13,'passband1']],...
		'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,'passband1']],...
		'Mask Entries','F2\/0\/ts\/')


%     Finished composite block ['DSB-SC AM',13,'passband1'].

set_param([sys,'/',['DSB-SC AM',13,'passband1']],...
		'hide name',0,...
		'position',[140,108,220,152])


%     Subsystem  ['DSB-SC AM',13,'passband2'].

new_system([sys,'/',['DSB-SC AM',13,'passband2']])
set_param([sys,'/',['DSB-SC AM',13,'passband2']],'Location',[103,459,555,641])

add_block('built-in/Sum',[sys,'/',['DSB-SC AM',13,'passband2/Sum2']])
set_param([sys,'/',['DSB-SC AM',13,'passband2/Sum2']],...
		'position',[170,90,190,110])

add_block('built-in/Fcn',[sys,'/',['DSB-SC AM',13,'passband2/Fcn']])
set_param([sys,'/',['DSB-SC AM',13,'passband2/Fcn']],...
		'Expr','cos(u[1])',...
		'position',[205,85,265,115])

add_block('built-in/Constant',[sys,'/',['DSB-SC AM',13,'passband2/Constant1']])
set_param([sys,'/',['DSB-SC AM',13,'passband2/Constant1']],...
		'Value','Ph',...
		'position',[60,115,100,145])

add_block('built-in/Inport',[sys,'/',['DSB-SC AM',13,'passband2/in_1']])
set_param([sys,'/',['DSB-SC AM',13,'passband2/in_1']],...
		'position',[205,20,225,40])

add_block('built-in/Outport',[sys,'/',['DSB-SC AM',13,'passband2/out_1']])