extrdisp.m

数字通信第四版原书的例程

add_block('built-in/Inport',[sys,'/',['Power Spectral',13,'Sensity/input signal']])
set_param([sys,'/',['Power Spectral',13,'Sensity/input signal']],...
		'position',[50,55,70,75])

add_block('built-in/S-Function',[sys,'/',['Power Spectral',13,'Sensity/S-function block ',13,'which calls M-file']])
set_param([sys,'/',['Power Spectral',13,'Sensity/S-function block ',13,'which calls M-file']],...
		'function name','sfunpsd',...
		'parameters','fftpts,npts,HowOften,offset,ts,0',...
		'position',[160,46,210,84])
add_line([sys,'/',['Power Spectral',13,'Sensity']],[75,65;155,65])
set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Mask Display','plot(0,0,100,100,[14,91,91,14,14],[86,86,40,40,86],[85,82,80,79,75,67,63,60,57,53,41,36,33,27,24],[49,50,53,50,49,51,54,66,54,50,50,52,81,51,49])')
set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Mask Type','Spectrum analyzer.',...
		'Mask Dialogue','Spectrum analyser using graph window.|Length of buffer:|Number of points for fft:|Plot after how many points:|Sample time:')
set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Mask Translate','npts=@1; fftpts=@2; HowOften=@3; ts=@4(1); if length(@4) > 1, offset = @4(2), else, offset = 0; end')
set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Mask Help','This block when hooked to the output of a system displays the frequency content of the buffer in the graph window. For more see the M-file specanal.')
set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Mask Entries','128\/512\/64\/0.1\/')


%     Finished composite block ['Power Spectral',13,'Sensity'].

set_param([sys,'/',['Power Spectral',13,'Sensity']],...
		'Drop Shadow',4,...
		'position',[55,65,85,105])


%     Subsystem  'Cross Correlator'.

new_system([sys,'/','Cross Correlator'])
set_param([sys,'/','Cross Correlator'],'Location',[0,0,385,199])

add_block('built-in/Inport',[sys,'/','Cross Correlator/signal 1'])
set_param([sys,'/','Cross Correlator/signal 1'],...
		'position',[50,55,70,75])

add_block('built-in/Inport',[sys,'/','Cross Correlator/signal 2'])
set_param([sys,'/','Cross Correlator/signal 2'],...
		'Port','2',...
		'position',[50,105,70,125])

add_block('built-in/Mux',[sys,'/','Cross Correlator/Mux'])
set_param([sys,'/','Cross Correlator/Mux'],...
		'inputs','2',...
		'position',[150,81,180,114])

add_block('built-in/S-Function',[sys,'/',['Cross Correlator/S-function block',13,'which calls M-file']])
set_param([sys,'/',['Cross Correlator/S-function block',13,'which calls M-file']],...
		'function name','sfuncorr',...
		'parameters','npts,HowOften,offset,ts,1,''unbiased''',...
		'position',[225,83,290,117])
add_line([sys,'/','Cross Correlator'],[75,65;100,65;100,90;145,90])
add_line([sys,'/','Cross Correlator'],[75,115;100,115;100,105;145,105])
add_line([sys,'/','Cross Correlator'],[185,100;220,100])
set_param([sys,'/','Cross Correlator'],...
		'Mask Display','plot(0,0,100,100,[10,92,92,10,10],[90,90,40,40,90],[80,59,40,20],[70,79,70,79],[79,70,59,51,40,30,21],[60,51,60,50,60,50,60])',...
		'Mask Type','Crosscorrelator.')
set_param([sys,'/','Cross Correlator'],...
		'Mask Dialogue','Cross correlator using graph window.\nRequires signal processing toolbox.|Length of buffer:|Plot after how many points:|Sample time:')
set_param([sys,'/','Cross Correlator'],...
		'Mask Translate','npts=@1; HowOften=@2; ts=@3(1); if length(@3) > 1, offset = @3(2), else, offset = 0; end')
set_param([sys,'/','Cross Correlator'],...
		'Mask Help','This block when hooked to the outputs of a system displays the cross correlation of the buffer in the graph window. For more see the M-file crosscor.',...
		'Mask Entries','100\/50\/0.1\/')


%     Finished composite block 'Cross Correlator'.

set_param([sys,'/','Cross Correlator'],...
		'Drop Shadow',4,...
		'position',[55,254,85,296])


%     Subsystem  'Auto Correlator'.

new_system([sys,'/','Auto Correlator'])
set_param([sys,'/','Auto Correlator'],'Location',[0,0,274,124])

add_block('built-in/Inport',[sys,'/','Auto Correlator/input signal'])
set_param([sys,'/','Auto Correlator/input signal'],...
		'position',[50,55,70,75])

add_block('built-in/S-Function',[sys,'/',['Auto Correlator/S-function block',13,'which calls M-file']])
set_param([sys,'/',['Auto Correlator/S-function block',13,'which calls M-file']],...
		'function name','sfuncorr',...
		'parameters','npts,HowOften,offset,ts,0,''unbiased''',...
		'position',[160,48,225,82])
add_line([sys,'/','Auto Correlator'],[75,65;155,65])
set_param([sys,'/','Auto Correlator'],...
		'Mask Display','plot(0,0,100,100,[11,93,93,11,11],[90,90,40,40,90],[80,60,40,20],[50,79,50,80])',...
		'Mask Type','Autocorrelator.')
set_param([sys,'/','Auto Correlator'],...
		'Mask Dialogue','Auto correlator using graph window.\nRequires signal processing toolbox.|Length of buffer:|Plot after how many points:|Sample time:')
set_param([sys,'/','Auto Correlator'],...
		'Mask Translate','npts=@1; HowOften=@2; ts=@3(1); if length(@3) > 1, offset = @3(2), else, offset = 0; end')
set_param([sys,'/','Auto Correlator'],...
		'Mask Help','This block when hooked to the output of a system displays the auto correlation of the buffer in the graph window. For more see the M-file autocorr.',...
		'Mask Entries','100\/50\/0.1\/')


%     Finished composite block 'Auto Correlator'.

set_param([sys,'/','Auto Correlator'],...
		'Drop Shadow',4,...
		'position',[240,260,270,300])


%     Subsystem  ['Averaging',13,'Spectrum Analyzer'].

new_system([sys,'/',['Averaging',13,'Spectrum Analyzer']])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],'Location',[0,0,345,183])

add_block('built-in/Mux',[sys,'/',['Averaging',13,'Spectrum Analyzer/Mux']])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer/Mux']],...
		'inputs','2',...
		'position',[125,76,155,109])

add_block('built-in/Inport',[sys,'/',['Averaging',13,'Spectrum Analyzer/system output']])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer/system output']],...
		'Port','2',...
		'position',[35,115,55,135])

add_block('built-in/S-Function',[sys,'/',['Averaging',13,'Spectrum Analyzer/S-function block',13,'which calls M-file']])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer/S-function block',13,'which calls M-file']],...
		'function name','sfuntf',...
		'parameters','fftpts,npts,HowOften,offset,ts,1',...
		'position',[230,77,275,113])

add_block('built-in/Inport',[sys,'/',['Averaging',13,'Spectrum Analyzer/system input']])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer/system input']],...
		'position',[35,35,55,55])
add_line([sys,'/',['Averaging',13,'Spectrum Analyzer']],[60,125;90,125;90,100;120,100])
add_line([sys,'/',['Averaging',13,'Spectrum Analyzer']],[60,45;90,45;90,85;120,85])
add_line([sys,'/',['Averaging',13,'Spectrum Analyzer']],[160,95;225,95])
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Mask Display','plot(0,0,100,100,[12,92,92,12,12],[90,90,40,40,90],[80,72,63,54,47,40,32,20],[61,61,62,65,69,73,75,75])',...
		'Mask Type','Spectrum analayser.')
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Mask Dialogue','Spectrum analyser using graph window.\nHook input 1 to system input.\nHook input 2 to system output.|Length of buffer:|Number of points for fft:|Plot after how many points:|Sample time:')
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Mask Translate','npts=@1; fftpts=@2; HowOften=@3; ts=@4(1); if length(@4) > 1, offset = @4(2), else, offset = 0; end')
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Mask Help','Hook the system''s input to the first port of this block and the system''s output to second port. Results are displayed as the frequency response of this system. Use signals with high harmonic content for best results. ')
set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Mask Entries','256\/256\/64\/0.1\/')


%     Finished composite block ['Averaging',13,'Spectrum Analyzer'].

set_param([sys,'/',['Averaging',13,'Spectrum Analyzer']],...
		'Drop Shadow',4,...
		'position',[240,156,270,194])

add_block('built-in/Note',[sys,'/','Double click on DEMO blocks for example systems.'])
set_param([sys,'/','Double click on DEMO blocks for example systems.'],...
		'position',[170,335,175,340])

add_block('built-in/Note',[sys,'/','Analyzers'])
set_param([sys,'/','Analyzers'],...
		'position',[155,15,160,20])

drawnow

% Return any arguments.
if (nargin | nargout)
	% Must use feval here to access system in memory
	if (nargin > 3)
		if (flag == 0)
			eval(['[ret,x0,str,ts,xts]=',sys,'(t,x,u,flag);'])
		else
			eval(['ret =', sys,'(t,x,u,flag);'])
		end
	else
		[ret,x0,str,ts,xts] = feval(sys);
	end
else
	drawnow % Flash up the model and execute load callback
end