tutmodcs.m

数字通信第四版原书的例程

add_block('built-in/Gain',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity']],...
		'Gain','Kc',...
		'position',[105,15,155,45])

add_block('built-in/Clock',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Clock']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Clock']],...
		'position',[180,80,200,100])

add_block('built-in/Gain',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity2']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity2']],...
		'Gain','Fc',...
		'position',[255,75,300,105])

add_block('built-in/Sum',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sum']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sum']],...
		'inputs','+++',...
		'position',[465,27,485,63])

add_block('built-in/Constant',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Phase']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Phase']],...
		'Value','Ph',...
		'position',[400,100,420,120])

add_block('built-in/Fcn',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/sin']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/sin']],...
		'Expr','cos(u[1])',...
		'position',[510,32,585,58])

add_block('built-in/Gain',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity3']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/Sensitivity3']],...
		'Gain','Ac',...
		'position',[605,30,655,60])

add_block('built-in/Outport',[sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/out_1']])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO/out_1']],...
		'position',[690,35,710,55])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[60,30;100,30])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[160,30;225,30])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[255,35;295,35])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[490,45;505,45])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[205,90;250,90])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[305,90;425,90;425,45;460,45])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[355,35;460,35])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[370,35;370,70;205,70;205,40;225,40])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[425,110;435,110;435,55;460,55])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[590,45;600,45])
add_line([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],[660,45;685,45])
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'Mask Display','Discrete\nVCO',...
		'Mask Type','VCO')
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'Mask Dialogue','Voltage-Controlled Oscilator:|Amplitude constant:|Carier frequency (Hz):|Sensitivity constant:|Initial phase (rad):|Sample time:')
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'Mask Translate','Ac=@1;Fc=@2;Kc=@3;Ph=@4;pi2=2*pi;ts=@5;Kc=Kc*pi2*ts(1);Fc=Fc*pi2;')
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'Mask Help','The VCO block cause the frequency of the sinusoidal carrier to depend on the input signal voltage, resulting in frequency of the output change depending on the amplitude of the input signal.')
set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'Mask Entries','1\/Fc\/1\/Ph\/ts\/')


%     Finished composite block ['FDM',13,'passband/Discrete-time',13,'VCO'].

set_param([sys,'/',['FDM',13,'passband/Discrete-time',13,'VCO']],...
		'orientation',2,...
		'position',[240,95,300,135])

add_block('built-in/Filter',[sys,'/',['FDM',13,'passband/Filter']])
set_param([sys,'/',['FDM',13,'passband/Filter']],...
		'Numerator','num',...
		'Denominator','den',...
		'Sample time','ts',...
		'position',[275,26,330,64])

add_block('built-in/Product',[sys,'/',['FDM',13,'passband/Multiplier',13,'phase detector']])
set_param([sys,'/',['FDM',13,'passband/Multiplier',13,'phase detector']],...
		'position',[190,35,215,55])

add_block('built-in/Gain',[sys,'/',['FDM',13,'passband/Sensitivity']])
set_param([sys,'/',['FDM',13,'passband/Sensitivity']],...
		'Gain','2',...
		'position',[75,25,115,55])
add_line([sys,'/',['FDM',13,'passband']],[120,40;185,40])
add_line([sys,'/',['FDM',13,'passband']],[50,40;70,40])
add_line([sys,'/',['FDM',13,'passband']],[335,45;415,45])
add_line([sys,'/',['FDM',13,'passband']],[385,45;385,115;305,115])
add_line([sys,'/',['FDM',13,'passband']],[220,45;270,45])
add_line([sys,'/',['FDM',13,'passband']],[235,115;135,115;135,50;185,50])
set_param([sys,'/',['FDM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);FDM',...
		'Mask Type','Passabnd FDM')
set_param([sys,'/',['FDM',13,'passband']],...
		'Mask Dialogue','Demodulate an FM modulated signal\nusing phase-locked loop.|VCO frequency (Hz):|VCO initial phase (rad):|Lowpass filter numerator:|Lowpass filter denominator:|Sample time (sec):')
set_param([sys,'/',['FDM',13,'passband']],...
		'Mask Translate','Fc=@1;Ph=@2+pi/2;num=@3;den=@4;ts=@5;[x,y]=moduicon(4);')
set_param([sys,'/',['FDM',13,'passband']],...
		'Mask Help','This block recovers a FM modulated signal using a phase-locked loop method. The phase detector used in this block is a multiplier.',...
		'Mask Entries','100/2/pi\/0\/num\/den\/ts\/')


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

set_param([sys,'/',['FDM',13,'passband']],...
		'hide name',0,...
		'position',[250,188,330,232])


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

new_system([sys,'/',['FM',13,'passband']])
set_param([sys,'/',['FM',13,'passband']],'Location',[451,587,939,737])

add_block('built-in/Sum',[sys,'/',['FM',13,'passband/Sum']])
set_param([sys,'/',['FM',13,'passband/Sum']],...
		'position',[130,42,150,78])

add_block('built-in/S-Function',[sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']])
set_param([sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']],...
		'function name','schdint',...
		'parameters','td, ts, limit',...
		'Mask Display','Schdld\nreset-int',...
		'Mask Type','Scheduled reset integration.')
set_param([sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']],...
		'Mask Dialogue','Reset the state to be zero(s) at the scheduled reset point.|Scheduled reset time inteval and offset:|Sample time and offset:|Modulo bound:')
set_param([sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']],...
		'Mask Translate','td=@1;ts=@2;limit=@3;')
set_param([sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']],...
		'Mask Help','This block resets the state(s) to be zero(s) at the begining of reset time inteval. The reset inteval can be a two elements vector with the second element being offset.')
set_param([sys,'/',['FM',13,'passband/Scheduled',13,'reset-int']],...
		'Mask Entries','td\/ts\/Inf\/',...
		'position',[200,39,260,81])

add_block('built-in/Constant',[sys,'/',['FM',13,'passband/Constant']])
set_param([sys,'/',['FM',13,'passband/Constant']],...
		'Value','Fc',...
		'position',[40,85,60,105])

add_block('built-in/Fcn',[sys,'/',['FM',13,'passband/sin']])
set_param([sys,'/',['FM',13,'passband/sin']],...
		'Expr','cos(u[1]*pi2+Ph)',...
		'position',[290,45,430,75])

add_block('built-in/Outport',[sys,'/',['FM',13,'passband/out_1']])
set_param([sys,'/',['FM',13,'passband/out_1']],...
		'position',[465,50,485,70])

add_block('built-in/Inport',[sys,'/',['FM',13,'passband/in_1']])
set_param([sys,'/',['FM',13,'passband/in_1']],...
		'position',[60,40,80,60])
add_line([sys,'/',['FM',13,'passband']],[85,50;125,50])
add_line([sys,'/',['FM',13,'passband']],[65,95;90,95;90,70;125,70])
add_line([sys,'/',['FM',13,'passband']],[155,60;195,60])
add_line([sys,'/',['FM',13,'passband']],[265,60;285,60])
add_line([sys,'/',['FM',13,'passband']],[435,60;460,60])
set_param([sys,'/',['FM',13,'passband']],...
		'Mask Display','plot(0,0,100,100,x,y);FM',...
		'Mask Type','Passband FM')
set_param([sys,'/',['FM',13,'passband']],...
		'Mask Dialogue','Modulate the input signal using FM method.|Carrier frequency (Hz):|Initial phase (rad):|Sample time (sec):|Symbol interval (sec; Use Inf for analog mod);')
set_param([sys,'/',['FM',13,'passband']],...
		'Mask Translate','Fc=@1;Ph=@2;pi2=2*pi;ts=@3;td=@4;if isinf(td),td=inf;end;[x,y]=moduicon(3);')
set_param([sys,'/',['FM',13,'passband']],...
		'Mask Help','This block modulates the input signal using frequency modulation method. The frequency of the output of the carrier signal depends on the amplitude of the input signal.')
set_param([sys,'/',['FM',13,'passband']],...
		'Mask Entries','100/2/pi\/0\/ts\/Inf/2\/')


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

set_param([sys,'/',['FM',13,'passband']],...
		'hide name',0,...
		'position',[125,188,205,232])

add_block('built-in/Outport',[sys,'/','Outport3'])
set_param([sys,'/','Outport3'],...
		'Port','4',...
		'position',[380,200,400,220])

add_block('built-in/Outport',[sys,'/','Outport2'])
set_param([sys,'/','Outport2'],...
		'Port','3',...
		'position',[380,140,400,160])


%     Subsystem  ['AM with carrier',13,'passband'].

new_system([sys,'/',['AM with carrier',13,'passband']])
set_param([sys,'/',['AM with carrier',13,'passband']],'Location',[68,468,570,611])

add_block('built-in/Note',[sys,'/',['AM with carrier',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp76']])
set_param([sys,'/',['AM with carrier',13,'passband/Ref: Hambley: An Intro to Comm. Systems. pp76']],...
		'position',[180,155,185,160])

add_block('built-in/Outport',[sys,'/',['AM with carrier',13,'passband/out_1']])
set_param([sys,'/',['AM with carrier',13,'passband/out_1']],...
		'position',[395,35,415,55])

add_block('built-in/Sum',[sys,'/',['AM with carrier',13,'passband/Sum']])
set_param([sys,'/',['AM with carrier',13,'passband/Sum']],...
		'position',[160,35,180,55])

add_block('built-in/Inport',[sys,'/',['AM with carrier',13,'passband/in_1']])
set_param([sys,'/',['AM with carrier',13,'passband/in_1']],...
		'position',[50,30,70,50])

add_block('built-in/Constant',[sys,'/',['AM with carrier',13,'passband/Constant']])
set_param([sys,'/',['AM with carrier',13,'passband/Constant']],...
		'Value','Offset',...
		'position',[60,75,110,95])


%     Subsystem  ['AM with carrier',13,'passband/DSB-SC AM',13,'discr-flt'].

new_system([sys,'/',['AM with carrier',13,'passband/DSB-SC AM',13,'discr-flt']])
set_param([sys,'/',['AM with carrier',13,'passband/DSB-SC AM',13,'discr-flt']],'Location',[51,135,503,309])

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

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

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

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

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

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

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

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

add_block('built-in/Filter',[sys,'/',['AM with carrier',13,'passband/DSB-SC AM',13,'discr-flt/zero-hold',13,'for timing-control']])
set_param([sys,'/',['AM with carrier',13,'passband/DSB-SC AM',13,'discr-flt/zero-hold',13,'for timing-control']],...
		'Numerator','1',...