tddmqask.m

数字通信第四版原书的例程

add_line([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],[85,165;130,165])
add_line([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],[175,165;285,165])
add_line([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],[175,40;275,40])
set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'Mask Display','QASK\nS-demap',...
		'Mask Type','QASK S-demap')
set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'Mask Dialogue','Reverse the QASK map. Input in-phase\nand quadrature components from the\ntwo inputs. Output demapped signal.|QASK M-ary number (outputs are in range [0, M-1]):|Output symbol interval and offset (sec):')
set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'Mask Translate','N=@1;td=@2;Ac=1;sftx=[1 -1 3 -3 5 -5 7 -7 9 -9 11 -11 13 -13 15 -15];sftx=sftx(1:2*ceil(sqrt(N)/2));sfty=sftx;if N==8,sfty=sfty(1:2);end;sftx=sftx/max(sftx)*Ac;sfty=sfty/max(sfty)*Ac;tab=qaskdeco(length(sftx),length(sfty),''fetch'')+1;x=[1:length(sftx)];y=[1:length(sfty)];')
set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'Mask Help','This block demaps a QASK mapped signal using square constellation. You can place this block after a QAM demodulation block. This block assumes the maximum amplitude of the input signals is 1. The output symbols are integers in the range [0, M-1].')
set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'Mask Entries','M\/td\/')


%     Finished composite block ['Square-map',13,'QASK demod/QASK',13,'square-demap'].

set_param([sys,'/',['Square-map',13,'QASK demod/QASK',13,'square-demap']],...
		'hide name',0,...
		'position',[205,28,285,72])


%     Subsystem  ['Square-map',13,'QASK demod/QADM',13,'passband'].

new_system([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']])
set_param([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],'Location',[194,478,738,741])

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

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

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

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

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

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

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

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

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

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

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

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

add_block('built-in/Outport',[sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband/out_1']])
set_param([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband/out_1']],...
		'position',[480,70,500,90])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[300,130;305,130;305,175;325,175])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[300,130;305,130;305,85;325,85])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[255,130;265,130])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[165,120;185,120;185,70;200,70])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[185,120;195,190])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[305,70;325,70])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[305,190;325,190])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[360,80;385,80])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[450,80;475,80])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[360,185;385,185])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[450,185;475,185])
add_line([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],[85,120;105,120])
set_param([sys,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);QADM',...
		'Mask Type','Passband DSB-SC QADM')
set_param([sys,'/',['Square-map',13,'QASK demod/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,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],...
		'Mask Translate','Fc=@1*2*pi;num=@2;den=@3;Ph=@4;ts=@5;[x,y]=moduicon(2);')
set_param([sys,'/',['Square-map',13,'QASK demod/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,'/',['Square-map',13,'QASK demod/QADM',13,'passband']],...
		'Mask Entries','Fc\/num\/den\/Ph\/ts\/')


%     Finished composite block ['Square-map',13,'QASK demod/QADM',13,'passband'].

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

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

add_block('built-in/Outport',[sys,'/',['Square-map',13,'QASK demod/out_1']])
set_param([sys,'/',['Square-map',13,'QASK demod/out_1']],...
		'position',[320,40,340,60])
add_line([sys,'/',['Square-map',13,'QASK demod']],[175,40;200,40])
add_line([sys,'/',['Square-map',13,'QASK demod']],[175,60;200,60])
add_line([sys,'/',['Square-map',13,'QASK demod']],[290,50;315,50])
add_line([sys,'/',['Square-map',13,'QASK demod']],[65,50;85,50])
set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'Mask Display','plot(0,0,100,100,x,y);S-QASK',...
		'Mask Type','Passband S-QASK demodulation')
set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'Mask Dialogue','Demodulate a QASK modulated signal\nusing square constellation.|M-ary number (output integer in range [0 M-1]):|Symbol interval (sec):|Carrier Frequency (Hz):|Initial phase (rad):|Sample time (sec):')
set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'Mask Translate','M=@1;td=@2;Fc=@3;Ph=@4;ts=@5;[num,den]=butter(5,Fc*2*ts);[x,y]=moduicon(6);')
set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'Mask Help','This block demodulates a MQASK modulated signal. The output signals are digits in the range [0, M-1]. When the symbol interval is a two-element vector, the second element is the offset (default 0). A default lowpass filter is used in the demodulation, which is [num, den]=butter(5, Fc*2*ts). Ungroup this block to specify the numerator and denominator of the lowpass filter.')
set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'Mask Entries','M\/td\/100/2/pi\/0\/ts\/')


%     Finished composite block ['Square-map',13,'QASK demod'].

set_param([sys,'/',['Square-map',13,'QASK demod']],...
		'hide name',0,...
		'position',[400,43,480,87])


%     Subsystem  ['Square-map',13,'QASK mod'].

new_system([sys,'/',['Square-map',13,'QASK mod']])
set_param([sys,'/',['Square-map',13,'QASK mod']],'Location',[623,526,913,666])


%     Subsystem  ['Square-map',13,'QASK mod/QAM',13,'passband'].

new_system([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']])
set_param([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],'Location',[302,478,834,743])

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

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

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

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

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

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

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

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

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

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

add_block('built-in/Clock',[sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband/Clock']])
set_param([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband/Clock']],...
		'position',[80,85,100,105])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[455,100;485,100])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[330,70;350,70])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[185,40;335,40;335,55;350,55])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[330,120;350,120])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[185,155;330,155;330,135;350,135])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[385,65;400,65;400,95;425,95])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[385,130;400,130;400,105;425,105])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[105,95;125,95])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[185,95;200,95;200,70;225,70])
add_line([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],[200,95;200,120;225,120])
set_param([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);QAM',...
		'Mask Type','Passband DSB-SC QAM')
set_param([sys,'/',['Square-map',13,'QASK mod/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,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],...
		'Mask Translate','Fc=@1*2*pi;Ph=@2;ts=@3;[x,y]=moduicon(1);')
set_param([sys,'/',['Square-map',13,'QASK mod/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,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],...
		'Mask Entries','Fc\/Ph\/ts\/')


%     Finished composite block ['Square-map',13,'QASK mod/QAM',13,'passband'].

set_param([sys,'/',['Square-map',13,'QASK mod/QAM',13,'passband']],...
		'ForeGround',4,...
		'position',[165,53,245,97])


%     Subsystem  ['Square-map',13,'QASK mod/QASK',13,'square-map'].

new_system([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map']])
set_param([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map']],'Location',[214,372,642,541])

add_block('built-in/Look Up Table',[sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/c-y axis']])
set_param([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/c-y axis']],...
		'Input_Values','z',...
		'Output_Values','y',...
		'position',[245,90,280,120])

add_block('built-in/Outport',[sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/out_2']])
set_param([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/out_2']],...
		'Port','2',...
		'position',[325,95,345,115])

add_block('built-in/Look Up Table',[sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/s-x axis']])
set_param([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/s-x axis']],...
		'Input_Values','z',...
		'Output_Values','x',...
		'position',[245,25,280,55])

add_block('built-in/Outport',[sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/out_1']])
set_param([sys,'/',['Square-map',13,'QASK mod/QASK',13,'square-map/out_1']],...
		'position',[325,30,345,50])