tstenv.m

数字通信第四版原书的例程

function [ret,x0,str,ts,xts]=tstenv(t,x,u,flag);
%TSTENV is the M-file description of the SIMULINK system named TSTENV.
% The block-diagram can be displayed by typing: TSTENV.
%
% SYS=TSTENV(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 TSTENV 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 TSTENV with a FLAG of zero:
%    [SIZES]=TSTENV([],[],[],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',[212,428,775,683])
     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', '.010')
set_param(sys,'Relative error','1e-3')
set_param(sys,'Return vars',   '')


%     Subsystem  ['Envelop',13,'Detector2'].

new_system([sys,'/',['Envelop',13,'Detector2']])
set_param([sys,'/',['Envelop',13,'Detector2']],'Location',[86,374,774,617])

add_block('built-in/Gain',[sys,'/',['Envelop',13,'Detector2/Gain1']])
set_param([sys,'/',['Envelop',13,'Detector2/Gain1']],...
           'Gain','g',...
          'position',[585,100,605,120])

add_block('built-in/Outport',[sys,'/',['Envelop',13,'Detector2/out_1']])
set_param([sys,'/',['Envelop',13,'Detector2/out_1']],...
           'position',[625,100,645,120])

add_block('built-in/Gain',[sys,'/',['Envelop',13,'Detector2/Gain']])
set_param([sys,'/',['Envelop',13,'Detector2/Gain']],...
                'Gain','g',...
          'position',[65,100,85,120])

add_block('built-in/Inport',[sys,'/',['Envelop',13,'Detector2/in_1']])
set_param([sys,'/',['Envelop',13,'Detector2/in_1']],...
                'position',[15,100,35,120])

add_block('built-in/Switch',[sys,'/',['Envelop',13,'Detector2/Switch']])
set_param([sys,'/',['Envelop',13,'Detector2/Switch']],...
            'Threshold','eps',...
           'position',[505,94,530,126])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector2/Memory']])
set_param([sys,'/',['Envelop',13,'Detector2/Memory']],...
           'position',[140,35,180,65])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector2/Memory2']])
set_param([sys,'/',['Envelop',13,'Detector2/Memory2']],...
          'orientation',2,...
             'position',[495,155,535,185])

add_block('built-in/Relational Operator',[sys,'/',['Envelop',13,'Detector2/Relational',13,'Operator1']])
set_param([sys,'/',['Envelop',13,'Detector2/Relational',13,'Operator1']],...
               'Operator','>',...
              'position',[385,98,415,122])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector2/Memory1']])
set_param([sys,'/',['Envelop',13,'Detector2/Memory1']],...
         'position',[300,125,340,155])

add_block('built-in/Relational Operator',[sys,'/',['Envelop',13,'Detector2/Relational',13,'Operator']])
set_param([sys,'/',['Envelop',13,'Detector2/Relational',13,'Operator']],...
         'position',[225,93,255,117])
add_line([sys,'/',['Envelop',13,'Detector2']],[610,110;620,110])
add_line([sys,'/',['Envelop',13,'Detector2']],[535,110;560,110;560,170;540,170])
add_line([sys,'/',['Envelop',13,'Detector2']],[560,110;580,110])
add_line([sys,'/',['Envelop',13,'Detector2']],[90,110;105,110;105,50;135,50])
add_line([sys,'/',['Envelop',13,'Detector2']],[105,110;220,110])
add_line([sys,'/',['Envelop',13,'Detector2']],[40,110;60,110])
add_line([sys,'/',['Envelop',13,'Detector2']],[490,170;480,170;480,120;500,120])
add_line([sys,'/',['Envelop',13,'Detector2']],[420,110;500,110])
add_line([sys,'/',['Envelop',13,'Detector2']],[260,105;270,105;270,140;295,140])
add_line([sys,'/',['Envelop',13,'Detector2']],[270,105;380,105])
add_line([sys,'/',['Envelop',13,'Detector2']],[345,140;355,140;355,115;380,115])
add_line([sys,'/',['Envelop',13,'Detector2']],[185,50;195,50;195,100;220,100])
add_line([sys,'/',['Envelop',13,'Detector2']],[195,50;490,50;500,100])
set_param([sys,'/',['Envelop',13,'Detector2']],...
           'Mask Display','Envelop\nDetector',...
          'Mask Type','Envelop Detector',...
              'Mask Dialogue','Envelop Detector:|Boundary Side (''upper'' or ''lower''):')
set_param([sys,'/',['Envelop',13,'Detector2']],...
          'Mask Translate','x=@1;if length(x)<2, error(''Error in Envelop Detector''); end; x=x(1:2); g=1; if x==''lo'', g=-1; end;',...
          'Mask Help','Envelop Detector detects the envelop of a signal.')
set_param([sys,'/',['Envelop',13,'Detector2']],...
              'Mask Entries','''upper''\/')


%     Finished composite block ['Envelop',13,'Detector2'].

set_param([sys,'/',['Envelop',13,'Detector2']],...
               'ForeGround',3,...
              'position',[235,44,295,96])


%     Subsystem  ['Envelop',13,'Detector1'].

new_system([sys,'/',['Envelop',13,'Detector1']])
set_param([sys,'/',['Envelop',13,'Detector1']],'Location',[86,374,774,617])

add_block('built-in/Relational Operator',[sys,'/',['Envelop',13,'Detector1/Relational',13,'Operator']])
set_param([sys,'/',['Envelop',13,'Detector1/Relational',13,'Operator']],...
            'position',[225,93,255,117])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector1/Memory1']])
set_param([sys,'/',['Envelop',13,'Detector1/Memory1']],...
         'position',[300,125,340,155])

add_block('built-in/Relational Operator',[sys,'/',['Envelop',13,'Detector1/Relational',13,'Operator1']])
set_param([sys,'/',['Envelop',13,'Detector1/Relational',13,'Operator1']],...
               'Operator','>',...
              'position',[385,98,415,122])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector1/Memory2']])
set_param([sys,'/',['Envelop',13,'Detector1/Memory2']],...
         'orientation',2,...
             'position',[495,155,535,185])

add_block('built-in/Memory',[sys,'/',['Envelop',13,'Detector1/Memory']])
set_param([sys,'/',['Envelop',13,'Detector1/Memory']],...
          'position',[140,35,180,65])

add_block('built-in/Switch',[sys,'/',['Envelop',13,'Detector1/Switch']])
set_param([sys,'/',['Envelop',13,'Detector1/Switch']],...
            'Threshold','eps',...
           'position',[505,94,530,126])

add_block('built-in/Inport',[sys,'/',['Envelop',13,'Detector1/in_1']])
set_param([sys,'/',['Envelop',13,'Detector1/in_1']],...
               'position',[15,100,35,120])

add_block('built-in/Gain',[sys,'/',['Envelop',13,'Detector1/Gain']])
set_param([sys,'/',['Envelop',13,'Detector1/Gain']],...
          'Gain','g',...
          'position',[65,100,85,120])

add_block('built-in/Outport',[sys,'/',['Envelop',13,'Detector1/out_1']])
set_param([sys,'/',['Envelop',13,'Detector1/out_1']],...
             'position',[625,100,645,120])

add_block('built-in/Gain',[sys,'/',['Envelop',13,'Detector1/Gain1']])
set_param([sys,'/',['Envelop',13,'Detector1/Gain1']],...
              'Gain','g',...
          'position',[585,100,605,120])
add_line([sys,'/',['Envelop',13,'Detector1']],[185,50;195,50;195,100;220,100])
add_line([sys,'/',['Envelop',13,'Detector1']],[195,50;490,50;500,100])
add_line([sys,'/',['Envelop',13,'Detector1']],[345,140;355,140;355,115;380,115])
add_line([sys,'/',['Envelop',13,'Detector1']],[260,105;270,105;270,140;295,140])
add_line([sys,'/',['Envelop',13,'Detector1']],[270,105;380,105])
add_line([sys,'/',['Envelop',13,'Detector1']],[420,110;500,110])
add_line([sys,'/',['Envelop',13,'Detector1']],[535,110;560,110;560,170;540,170])
add_line([sys,'/',['Envelop',13,'Detector1']],[490,170;480,170;480,120;500,120])
add_line([sys,'/',['Envelop',13,'Detector1']],[40,110;60,110])
add_line([sys,'/',['Envelop',13,'Detector1']],[90,110;105,110;105,50;135,50])
add_line([sys,'/',['Envelop',13,'Detector1']],[105,110;220,110])
add_line([sys,'/',['Envelop',13,'Detector1']],[560,110;580,110])
add_line([sys,'/',['Envelop',13,'Detector1']],[610,110;620,110])
set_param([sys,'/',['Envelop',13,'Detector1']],...
          'Mask Display','Envelop\nDetector',...
          'Mask Type','Envelop Detector',...
              'Mask Dialogue','Envelop Detector:|Boundary Side (''upper'' or ''lower''):')
set_param([sys,'/',['Envelop',13,'Detector1']],...
          'Mask Translate','x=@1;if length(x)<2, error(''Error in Envelop Detector''); end; x=x(1:2); g=1; if x==''lo'', g=-1; end;',...
          'Mask Help','Envelop Detector detects the envelop of a signal.')
set_param([sys,'/',['Envelop',13,'Detector1']],...
              'Mask Entries','''lower''\/')


%     Finished composite block ['Envelop',13,'Detector1'].

set_param([sys,'/',['Envelop',13,'Detector1']],...
               'ForeGround',2,...
              'position',[235,134,295,186])

add_block('built-in/Signal Generator',[sys,'/',['Signal',13,'Generator']])
set_param([sys,'/',['Signal',13,'Generator']],...
                'ForeGround',5,...
              'Peak','0.370000',...
           'Peak Range','5.000000',...
             'Freq','1.000000',...
           'Freq Range','50.000000',...
            'Wave','Sin',...