com_mocd.m

数字通信第四版原书的例程

function [ret,x0,str,ts,xts]=com_mocd(t,x,u,flag);
%COM_MOCD	is the M-file description of the SIMULINK system named COM_MOCD.
%	The block-diagram can be displayed by typing: COM_MOCD.
%
%	SYS=COM_MOCD(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 COM_MOCD 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 COM_MOCD with a FLAG of zero:
%	[SIZES]=COM_MOCD([],[],[],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',[104,42,769,713])
     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',   '')

add_block('built-in/Note',[sys,'/','Passband Digital Modulation//Demodulation Map//Demap Library'])
set_param([sys,'/','Passband Digital Modulation//Demodulation Map//Demap Library'],...
		'ForeGround',2,...
		'Font Weight','bold',...
		'Font Size',12,...
		'position',[325,0,330,5])


%     Subsystem  ['QASK',13,'arbitrary-map'].

new_system([sys,'/',['QASK',13,'arbitrary-map']])
set_param([sys,'/',['QASK',13,'arbitrary-map']],'Location',[58,103,403,268])

add_block('built-in/Outport',[sys,'/',['QASK',13,'arbitrary-map/Imag']])
set_param([sys,'/',['QASK',13,'arbitrary-map/Imag']],...
		'Port','2',...
		'position',[275,100,295,120])

add_block('built-in/Outport',[sys,'/',['QASK',13,'arbitrary-map/Real']])
set_param([sys,'/',['QASK',13,'arbitrary-map/Real']],...
		'position',[275,20,295,40])

add_block('built-in/Look Up Table',[sys,'/',['QASK',13,'arbitrary-map/imag part1']])
set_param([sys,'/',['QASK',13,'arbitrary-map/imag part1']],...
		'Input_Values','x',...
		'Output_Values','y2',...
		'position',[175,97,210,123])

add_block('built-in/Look Up Table',[sys,'/',['QASK',13,'arbitrary-map/real part']])
set_param([sys,'/',['QASK',13,'arbitrary-map/real part']],...
		'Input_Values','x',...
		'Output_Values','y1',...
		'position',[180,17,215,43])

add_block('built-in/Inport',[sys,'/',['QASK',13,'arbitrary-map/in_1']])
set_param([sys,'/',['QASK',13,'arbitrary-map/in_1']],...
		'position',[25,20,45,40])

add_block('built-in/Zero-Order Hold',[sys,'/',['QASK',13,'arbitrary-map/Zero-Order',13,'Hold1']])
set_param([sys,'/',['QASK',13,'arbitrary-map/Zero-Order',13,'Hold1']],...
		'Sample time','td',...
		'position',[80,14,115,46])
add_line([sys,'/',['QASK',13,'arbitrary-map']],[215,110;270,110])
add_line([sys,'/',['QASK',13,'arbitrary-map']],[220,30;270,30])
add_line([sys,'/',['QASK',13,'arbitrary-map']],[120,30;175,30])
add_line([sys,'/',['QASK',13,'arbitrary-map']],[145,30;145,110;170,110])
add_line([sys,'/',['QASK',13,'arbitrary-map']],[50,30;75,30])
set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'Mask Display','QASK\nA-map',...
		'Mask Type','QASK A-map')
set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'Mask Dialogue','QASK mapping for arbitrary defined\nmap. Assume input digit is K. 1st\noutport outputs in-phase(K+1). 2nd\noutport outputs quadrature(K+1).|Constellation for in-phase component:|Constellation for quadrature component:|Symbol interval and offset (sec):')
set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'Mask Translate','y1=@1;y2=@2;td=@3;ly=length(y1);x=[-10 1:ly-1;1:ly-1 10*ly]-.5;x=x(:);y1=y1(:)'';y1=[y1;y1];y1=y1(:);y2=y2(:)'';y2=[y2;y2];y2=y2(:);')
set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'Mask Help','This block maps a digital signal onto in-phase and quadratic components, which are outputs in the first and second output port respectively. The in-phase and quadrature constellation vectors must have the same length, which equals to M, the M-ary number of the QASK. The input signal is in the range of [0, M-1]. The symbol interval can be a two elements vector with the first element being offset. The default offset is zero.')
set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'Mask Entries','real(exp(j*[0:M-1]/M*pi*2))\/imag(exp(j*[0:M-1]/M*pi*2))\/td\/')


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

set_param([sys,'/',['QASK',13,'arbitrary-map']],...
		'position',[40,273,120,317])


%     Subsystem  ['QASK',13,'arbitrary-demap'].

new_system([sys,'/',['QASK',13,'arbitrary-demap']])
set_param([sys,'/',['QASK',13,'arbitrary-demap']],'Location',[45,449,594,684])

add_block('built-in/Constant',[sys,'/',['QASK',13,'arbitrary-demap/imag_pt']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/imag_pt']],...
		'BackGround',5,...
		'Value','y2',...
		'position',[165,169,190,191])

add_block('built-in/Constant',[sys,'/',['QASK',13,'arbitrary-demap/real_pt']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/real_pt']],...
		'BackGround',3,...
		'Value','y1',...
		'position',[170,84,195,106])

add_block('built-in/Outport',[sys,'/',['QASK',13,'arbitrary-demap/out_1']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/out_1']],...
		'position',[495,85,515,105])

add_block('built-in/S-Function',[sys,'/',['QASK',13,'arbitrary-demap/Minimum1']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Minimum1']],...
		'function name','arymimai',...
		'parameters','''min''',...
		'position',[415,85,475,105])

add_block('built-in/Sum',[sys,'/',['QASK',13,'arbitrary-demap/Sum2']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Sum2']],...
		'position',[370,78,390,107])

add_block('built-in/Product',[sys,'/',['QASK',13,'arbitrary-demap/Product1']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Product1']],...
		'position',[300,130,325,150])

add_block('built-in/Product',[sys,'/',['QASK',13,'arbitrary-demap/Product']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Product']],...
		'position',[300,45,325,65])

add_block('built-in/Sum',[sys,'/',['QASK',13,'arbitrary-demap/Sum6']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Sum6']],...
		'ForeGround',4,...
		'inputs','+-',...
		'position',[230,123,250,152])

add_block('built-in/Sum',[sys,'/',['QASK',13,'arbitrary-demap/Sum1']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Sum1']],...
		'ForeGround',2,...
		'inputs','+-',...
		'position',[230,38,250,67])

add_block('built-in/Zero-Order Hold',[sys,'/',['QASK',13,'arbitrary-demap/Zero-Order',13,'Hold1']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Zero-Order',13,'Hold1']],...
		'ForeGround',4,...
		'Sample time','td',...
		'position',[120,114,155,146])

add_block('built-in/Inport',[sys,'/',['QASK',13,'arbitrary-demap/imag']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/imag']],...
		'Port','2',...
		'position',[45,120,65,140])

add_block('built-in/Inport',[sys,'/',['QASK',13,'arbitrary-demap/real']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/real']],...
		'position',[45,35,65,55])

add_block('built-in/Zero-Order Hold',[sys,'/',['QASK',13,'arbitrary-demap/Zero-Order',13,'Hold']])
set_param([sys,'/',['QASK',13,'arbitrary-demap/Zero-Order',13,'Hold']],...
		'ForeGround',2,...
		'Sample time','td',...
		'position',[120,29,155,61])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[480,95;490,95])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[395,95;410,95])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[330,140;340,140;340,100;365,100])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[330,55;340,55;340,85;365,85])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[255,140;270,140;270,135;295,135])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[270,140;270,145;295,145])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[255,55;270,55;270,50;295,50])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[270,55;270,60;295,60])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[195,180;205,180;205,145;225,145])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[160,130;225,130])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[160,45;225,45])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[200,95;205,95;205,60;225,60])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[70,130;115,130])
add_line([sys,'/',['QASK',13,'arbitrary-demap']],[70,45;115,45])
set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'Mask Display','QASK\nA-demap',...
		'Mask Type','QASK A-demap')
set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'Mask Dialogue','Reverse the QASK map. Input in-phase\nand quadrature components from the\ntwo inputs. Output demapped signal.|Constellation for in-phase component:|Constellation for quadrature component:|Symbol interval and offset (sec):')
set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'Mask Translate','y1=@1;y2=@2;td=@3;')
set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'Mask Help','This block demaps a QASK mapped signal using user defined arbitrary constellation. You can place this block after a QAM demodulation block. The in-phase and quadrature constellation vectors must have the same length, which equals to M, the M-ary number of the QASK. The output symbols are integers in the range [0, M-1]. The symbol interval can be a two elements vector with the first element being offset. The default offset is zero.')
set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'Mask Entries','real(exp(j*[0:M-1]/M*pi*2))\/imag(exp(j*[0:M-1]/M*pi*2))\/td\/')


%     Finished composite block ['QASK',13,'arbitrary-demap'].

set_param([sys,'/',['QASK',13,'arbitrary-demap']],...
		'position',[445,273,525,317])


%     Subsystem  ['QASK Mo//Dem',13,'demo1'].

new_system([sys,'/',['QASK Mo//Dem',13,'demo1']])
set_param([sys,'/',['QASK Mo//Dem',13,'demo1']],'Location',[175,552,335,697])
set_param([sys,'/',['QASK Mo//Dem',13,'demo1']],...
		'Mask Display','QASK\nC-map\ndemo',...
		'Mask Dialogue','eval(''ts=.01;[num,den]=butter(4,100/pi/2*ts);td=.2;M=128;tstps2cd'')')


%     Finished composite block ['QASK Mo//Dem',13,'demo1'].

set_param([sys,'/',['QASK Mo//Dem',13,'demo1']],...
		'BackGround',7,...
		'hide name',0,...
		'position',[565,198,645,242])


%     Subsystem  ['QASK Mo//Dem',13,'demo2'].

new_system([sys,'/',['QASK Mo//Dem',13,'demo2']])
set_param([sys,'/',['QASK Mo//Dem',13,'demo2']],'Location',[175,552,335,697])
set_param([sys,'/',['QASK Mo//Dem',13,'demo2']],...
		'Mask Display','QASK\nA-map\ndemo',...
		'Mask Dialogue','eval(''ts=.01;[num,den]=butter(4,100/pi/2*ts);td=.2;M=32;tstps3cd'')')


%     Finished composite block ['QASK Mo//Dem',13,'demo2'].

set_param([sys,'/',['QASK Mo//Dem',13,'demo2']],...
		'BackGround',7,...
		'hide name',0,...
		'position',[565,273,645,317])


%     Subsystem  ['FSK Mo//Dem',13,'demo'].

new_system([sys,'/',['FSK Mo//Dem',13,'demo']])
set_param([sys,'/',['FSK Mo//Dem',13,'demo']],'Location',[175,552,335,697])
set_param([sys,'/',['FSK Mo//Dem',13,'demo']],...
		'Mask Display','MFSK\nmap\ndemo',...
		'Mask Dialogue','eval(''ts=.01;td=.2;M=8;Fc=100/pi/2;tstfs2cd'')')


%     Finished composite block ['FSK Mo//Dem',13,'demo'].

set_param([sys,'/',['FSK Mo//Dem',13,'demo']],...
		'BackGround',7,...
		'hide name',0,...
		'position',[565,348,645,392])