tstbterr.m

数字通信第四版原书的例程

function [ret,x0,str,ts,xts]=tstbterr(t,x,u,flag);
%TSTBTERR	is the M-file description of the SIMULINK system named TSTBTERR.
%	The block-diagram can be displayed by typing: TSTBTERR.
%
%	SYS=TSTBTERR(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 TSTBTERR 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 TSTBTERR with a FLAG of zero:
%	[SIZES]=TSTBTERR([],[],[],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',[79,112,698,276])
     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','M=16;td=.1;ts=.01;Fc=100/pi/2;[num,den]=butter(5,Fc*2*ts);');

add_block('built-in/Mux',[sys,'/','Mux'])
set_param([sys,'/','Mux'],...
		'hide name',0,...
		'inputs','2',...
		'position',[445,81,480,114])


%     Subsystem  ['S-map QASK',13,'demod baseband1'].

new_system([sys,'/',['S-map QASK',13,'demod baseband1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1']],'Location',[33,553,383,660])

add_block('built-in/Note',[sys,'/',['S-map QASK',13,'demod baseband1/tab=qaskdeco(']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/tab=qaskdeco(']],...
		'position',[205,180,210,185])

add_block('built-in/Outport',[sys,'/',['S-map QASK',13,'demod baseband1/out_1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/out_1']],...
		'position',[320,40,340,60])

add_block('built-in/Inport',[sys,'/',['S-map QASK',13,'demod baseband1/in_1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/in_1']],...
		'position',[40,40,60,60])


%     Subsystem  ['S-map QASK',13,'demod baseband1/QADM',13,'baseband'].

new_system([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],'Location',[283,122,827,462])

add_block('built-in/Inport',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/in_1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/in_1']],...
		'position',[55,115,75,135])

add_block('built-in/Constant',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Constant1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Constant1']],...
		'Value','x2',...
		'position',[160,245,180,265])

add_block('built-in/Sum',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Sum1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Sum1']],...
		'position',[340,220,360,240])

add_block('built-in/Outport',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/out_2']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/out_2']],...
		'Port','2',...
		'position',[485,220,505,240])

add_block('built-in/Filter',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Filter1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Filter1']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[395,211,450,249])

add_block('built-in/Product',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product1']],...
		'position',[260,123,290,147])

add_block('built-in/Demux',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Demux']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Demux']],...
		'outputs','2',...
		'position',[120,105,160,140])

add_block('built-in/Constant',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Constant']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Constant']],...
		'Value','x1',...
		'position',[155,40,175,60])

add_block('built-in/Product',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product2']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product2']],...
		'position',[270,238,300,262])

add_block('built-in/Product',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product3']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product3']],...
		'position',[270,193,300,217])

add_block('built-in/Sum',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Sum']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Sum']],...
		'inputs','+-',...
		'position',[335,70,355,90])

add_block('built-in/Product',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Product']],...
		'position',[260,43,290,67])

add_block('built-in/Filter',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Filter']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Filter']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[390,61,445,99])

add_block('built-in/Note',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Ref: Hambley: An Intro to Comm. Systems. pp72']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/Ref: Hambley: An Intro to Comm. Systems. pp72']],...
		'position',[285,280,290,285])

add_block('built-in/Outport',[sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/out_1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband/out_1']],...
		'position',[480,70,500,90])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[165,115;230,115;230,60;255,60])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[230,115;230,245;265,245])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[185,255;200,255;200,140;255,140])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[200,255;265,255])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[165,130;255,130])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[180,130;180,210;265,210])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[180,50;255,50])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[215,50;215,200;265,200])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[295,55;305,55;305,75;330,75])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[295,135;305,135;305,85;330,85])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[305,205;315,205;315,225;335,225])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[305,250;315,250;315,235;335,235])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[80,125;115,125])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[360,80;385,80])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[450,80;475,80])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[365,230;390,230])
add_line([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],[455,230;480,230])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'Mask Display','plot(0,0,100,100,x,y,u,v);QADM',...
		'Mask Type','QM DSB-SC ADM CE')
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'Mask Dialogue','Demodulate the complex envelope of a\nQAM modulated signal into in-phase and\nquadrature components into 1st and 2nd\nout ports.|Lowpass filter numerator:|Lowpass filter denominator:|Initial phase (rad):|Sample time (sec):')
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'Mask Translate','num=@1;den=@2;Ph=@3;ts=@4;x1=cos(-Ph);x2=sin(-Ph);[x,y]=moduicon(2);[u,v]=cmplxicn(0,50,get_param(gcb,''orientation''));')
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'Mask Help','This block demodulates the quadratic multiplexed double-sideband suppressed-carrier amplitude modulation modulated signal using the QAM method. The filter to be specified is a lowpass filter that passes the signal message and eliminates the carrier signal.')
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'Mask Entries','num\/den\/Ph\/ts\/')


%     Finished composite block ['S-map QASK',13,'demod baseband1/QADM',13,'baseband'].

set_param([sys,'/',['S-map QASK',13,'demod baseband1/QADM',13,'baseband']],...
		'ForeGround',4,...
		'hide name',0,...
		'position',[90,28,170,72])


%     Subsystem  ['S-map QASK',13,'demod baseband1/QASK',13,'square-demap'].

new_system([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap']],'Location',[57,374,831,674])

add_block('built-in/Zero-Order Hold',[sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Zero-Order',13,'Hold']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Zero-Order',13,'Hold']],...
		'Sample time','td',...
		'position',[135,24,170,56])

add_block('built-in/Inport',[sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/in_1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/in_1']],...
		'position',[60,30,80,50])

add_block('built-in/Zero-Order Hold',[sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Zero-Order',13,'Hold1']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Zero-Order',13,'Hold1']],...
		'Sample time','td',...
		'position',[135,149,170,181])

add_block('built-in/Inport',[sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/in_2']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/in_2']],...
		'Port','2',...
		'position',[60,155,80,175])

add_block('built-in/Sum',[sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Sum5']])
set_param([sys,'/',['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/Sum5']],...
		'ForeGround',2,...
		'position',[470,153,490,182])


%     Subsystem  ['S-map QASK',13,'demod baseband1/QASK',13,'square-demap/2-D Table'].