tutmodcs.m

数字通信第四版原书的例程

function [ret,x0,str,ts,xts]=tutmodcs(t,x,u,flag);
%TUTMODCS	is the M-file description of the SIMULINK system named TUTMODCS.
%	The block-diagram can be displayed by typing: TUTMODCS.
%
%	SYS=TUTMODCS(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 TUTMODCS 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 TUTMODCS with a FLAG of zero:
%	[SIZES]=TUTMODCS([],[],[],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',[37,99,514,586])
     open_system(sys)
end;
set_param(sys,'algorithm',     'RK-45')
set_param(sys,'Start time',    '0.0')
set_param(sys,'Stop time',     '999999')
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/Signal Generator',[sys,'/',['Signal',13,'generator1']])
set_param([sys,'/',['Signal',13,'generator1']],...
		'Peak','1.000000',...
		'Peak Range','5.000000',...
		'Freq','6.000000',...
		'Freq Range','6.000000',...
		'Wave','Sin',...
		'Units','Rads',...
		'position',[15,383,60,417])

add_block('built-in/Outport',[sys,'/','Outport8'])
set_param([sys,'/','Outport8'],...
		'Port','9',...
		'position',[130,435,150,455])

add_block('built-in/Outport',[sys,'/','Outport7'])
set_param([sys,'/','Outport7'],...
		'Port','8',...
		'position',[370,390,390,410])

add_block('built-in/Outport',[sys,'/','Outport6'])
set_param([sys,'/','Outport6'],...
		'Port','7',...
		'position',[415,370,435,390])


%     Subsystem  ['QADM',13,'passband'].

new_system([sys,'/',['QADM',13,'passband']])
set_param([sys,'/',['QADM',13,'passband']],'Location',[194,478,738,741])

add_block('built-in/Clock',[sys,'/',['QADM',13,'passband/Clock']])
set_param([sys,'/',['QADM',13,'passband/Clock']],...
		'position',[60,110,80,130])

add_block('built-in/Gain',[sys,'/',['QADM',13,'passband/Gain']])
set_param([sys,'/',['QADM',13,'passband/Gain']],...
		'Gain','Fc',...
		'position',[110,101,160,139])

add_block('built-in/Filter',[sys,'/',['QADM',13,'passband/Filter1']])
set_param([sys,'/',['QADM',13,'passband/Filter1']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[390,166,445,204])

add_block('built-in/Filter',[sys,'/',['QADM',13,'passband/Filter']])
set_param([sys,'/',['QADM',13,'passband/Filter']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[390,61,445,99])

add_block('built-in/Gain',[sys,'/',['QADM',13,'passband/Gain1']])
set_param([sys,'/',['QADM',13,'passband/Gain1']],...
		'Gain','2',...
		'position',[270,118,295,142])

add_block('built-in/Inport',[sys,'/',['QADM',13,'passband/in_1']])
set_param([sys,'/',['QADM',13,'passband/in_1']],...
		'position',[230,120,250,140])

add_block('built-in/Note',[sys,'/',['QADM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp72']])
set_param([sys,'/',['QADM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp72']],...
		'position',[285,280,290,285])

add_block('built-in/Fcn',[sys,'/',['QADM',13,'passband/Fcn']])
set_param([sys,'/',['QADM',13,'passband/Fcn']],...
		'Expr','cos(u[1]+Ph)',...
		'position',[205,55,300,85])

add_block('built-in/Fcn',[sys,'/',['QADM',13,'passband/Fcn1']])
set_param([sys,'/',['QADM',13,'passband/Fcn1']],...
		'Expr','sin(u[1]+Ph)',...
		'position',[200,175,300,205])

add_block('built-in/Product',[sys,'/',['QADM',13,'passband/Product']])
set_param([sys,'/',['QADM',13,'passband/Product']],...
		'position',[330,62,355,93])

add_block('built-in/Product',[sys,'/',['QADM',13,'passband/Product1']])
set_param([sys,'/',['QADM',13,'passband/Product1']],...
		'position',[330,167,355,198])

add_block('built-in/Outport',[sys,'/',['QADM',13,'passband/out_2']])
set_param([sys,'/',['QADM',13,'passband/out_2']],...
		'Port','2',...
		'position',[480,175,500,195])

add_block('built-in/Outport',[sys,'/',['QADM',13,'passband/out_1']])
set_param([sys,'/',['QADM',13,'passband/out_1']],...
		'position',[480,70,500,90])
add_line([sys,'/',['QADM',13,'passband']],[300,130;305,130;305,175;325,175])
add_line([sys,'/',['QADM',13,'passband']],[300,130;305,130;305,85;325,85])
add_line([sys,'/',['QADM',13,'passband']],[255,130;265,130])
add_line([sys,'/',['QADM',13,'passband']],[165,120;185,120;185,70;200,70])
add_line([sys,'/',['QADM',13,'passband']],[185,120;195,190])
add_line([sys,'/',['QADM',13,'passband']],[305,70;325,70])
add_line([sys,'/',['QADM',13,'passband']],[305,190;325,190])
add_line([sys,'/',['QADM',13,'passband']],[360,80;385,80])
add_line([sys,'/',['QADM',13,'passband']],[450,80;475,80])
add_line([sys,'/',['QADM',13,'passband']],[360,185;385,185])
add_line([sys,'/',['QADM',13,'passband']],[450,185;475,185])
add_line([sys,'/',['QADM',13,'passband']],[85,120;105,120])
set_param([sys,'/',['QADM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);QADM',...
		'Mask Type','Passband DSB-SC QADM')
set_param([sys,'/',['QADM',13,'passband']],...
		'Mask Dialogue','Demodulate a DSB-SC QAM modulated\nsignal into in-phase and quadrature\ncomponents.|Carrier frequency (Hz):|Lowpass filter numerator:|Lowpass filter denominator:|Initial phase (rad):|Sample time (sec):')
set_param([sys,'/',['QADM',13,'passband']],...
		'Mask Translate','Fc=@1*2*pi;num=@2;den=@3;Ph=@4;ts=@5;[x,y]=moduicon(2);')
set_param([sys,'/',['QADM',13,'passband']],...
		'Mask Help','This block demodulates the QM-DSB-SC-AM modulated signal. The first output port outputs the in-phase component and the second port outputs the quadrature component. The demodulation uses a discrete-time lowpass filter that passes the signal message and eliminates the carrier signal. ')
set_param([sys,'/',['QADM',13,'passband']],...
		'Mask Entries','100/2/pi\/num\/den\/0\/ts\/')


%     Finished composite block ['QADM',13,'passband'].

set_param([sys,'/',['QADM',13,'passband']],...
		'hide name',0,...
		'position',[250,368,330,412])


%     Subsystem  ['QAM',13,'passband'].

new_system([sys,'/',['QAM',13,'passband']])
set_param([sys,'/',['QAM',13,'passband']],'Location',[302,478,834,743])

add_block('built-in/Fcn',[sys,'/',['QAM',13,'passband/Fcn']])
set_param([sys,'/',['QAM',13,'passband/Fcn']],...
		'Expr','cos(u[1]+Ph)',...
		'position',[230,55,325,85])

add_block('built-in/Fcn',[sys,'/',['QAM',13,'passband/Fcn1']])
set_param([sys,'/',['QAM',13,'passband/Fcn1']],...
		'Expr','sin(u[1]+Ph)',...
		'position',[230,105,325,135])

add_block('built-in/Note',[sys,'/',['QAM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp72']])
set_param([sys,'/',['QAM',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp72']],...
		'position',[250,305,255,310])

add_block('built-in/Product',[sys,'/',['QAM',13,'passband/Product']])
set_param([sys,'/',['QAM',13,'passband/Product']],...
		'position',[355,47,380,78])

add_block('built-in/Product',[sys,'/',['QAM',13,'passband/Product1']])
set_param([sys,'/',['QAM',13,'passband/Product1']],...
		'position',[355,112,380,143])

add_block('built-in/Sum',[sys,'/',['QAM',13,'passband/Sum2']])
set_param([sys,'/',['QAM',13,'passband/Sum2']],...
		'position',[430,90,450,110])

add_block('built-in/Outport',[sys,'/',['QAM',13,'passband/out_1']])
set_param([sys,'/',['QAM',13,'passband/out_1']],...
		'position',[490,90,510,110])

add_block('built-in/Inport',[sys,'/',['QAM',13,'passband/in_1']])
set_param([sys,'/',['QAM',13,'passband/in_1']],...
		'position',[160,30,180,50])

add_block('built-in/Inport',[sys,'/',['QAM',13,'passband/in_2']])
set_param([sys,'/',['QAM',13,'passband/in_2']],...
		'Port','2',...
		'position',[160,145,180,165])

add_block('built-in/Gain',[sys,'/',['QAM',13,'passband/Gain']])
set_param([sys,'/',['QAM',13,'passband/Gain']],...
		'Gain','Fc',...
		'position',[130,76,180,114])

add_block('built-in/Clock',[sys,'/',['QAM',13,'passband/Clock']])
set_param([sys,'/',['QAM',13,'passband/Clock']],...
		'position',[80,85,100,105])
add_line([sys,'/',['QAM',13,'passband']],[455,100;485,100])
add_line([sys,'/',['QAM',13,'passband']],[330,70;350,70])
add_line([sys,'/',['QAM',13,'passband']],[185,40;335,40;335,55;350,55])
add_line([sys,'/',['QAM',13,'passband']],[330,120;350,120])
add_line([sys,'/',['QAM',13,'passband']],[185,155;330,155;330,135;350,135])
add_line([sys,'/',['QAM',13,'passband']],[385,65;400,65;400,95;425,95])
add_line([sys,'/',['QAM',13,'passband']],[385,130;400,130;400,105;425,105])
add_line([sys,'/',['QAM',13,'passband']],[105,95;125,95])
add_line([sys,'/',['QAM',13,'passband']],[185,95;200,95;200,70;225,70])
add_line([sys,'/',['QAM',13,'passband']],[200,95;200,120;225,120])
set_param([sys,'/',['QAM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);QAM',...
		'Mask Type','Passband DSB-SC QAM')
set_param([sys,'/',['QAM',13,'passband']],...
		'Mask Dialogue','Modulate the in-phase signal from first input port and quadrature signal from\nthe second port using QAM.|Carrier frequency (Hz):|Initial phase (rad):|Sample time (sec):')
set_param([sys,'/',['QAM',13,'passband']],...
		'Mask Translate','Fc=@1*2*pi;Ph=@2;ts=@3;[x,y]=moduicon(1);')
set_param([sys,'/',['QAM',13,'passband']],...
		'Mask Help','This block modulates the in-phase component inputted from the first port and the quadrature component inputted from the second port by using two orthogonal sinusoidal carriers.')
set_param([sys,'/',['QAM',13,'passband']],...
		'Mask Entries','100/2/pi\/0\/ts\/')


%     Finished composite block ['QAM',13,'passband'].

set_param([sys,'/',['QAM',13,'passband']],...
		'hide name',0,...
		'position',[135,368,215,412])