matlab_通信系统方面调制解调的基本仿真代码

function [sys,x0,str,ts]=angle_a(t,x,u,flag) switch flag, case 0, [sys,x0,str,ts]=mdlInitializeSizes; case 3, sys=mdlOutputs(t,x,u); case{1,2,4,9} sys=[]; otherwise error(['Unhandled flag =',num2str(flag)]); end function [sys,x0,str,ts]=mdlInitializeSizes sizes=simsizes; sizes.NumContStates=0; sizes.NumDiscStates=0; sizes.NumOutputs=8; sizes.NumInputs=16; sizes.DirFeedthrough=1; sizes.NumSampleTimes=1; sys=simsizes(sizes); x0=[]; str=[]; ts=[0,0]; function sys=mdlOutputs(t,x,u) sys=[(pi/4).*(u(1)>0&u(2)>0)+(3*pi/4).*(u(1)<0&u(2)>0)+(5*pi/4).*(u(1)<0&u(2)<0)+(7*pi/4).*(u(1)>0&u(2)<0), (pi/2).*((u(3)+u(4))>0&(u(4)-u(3))>0)+pi.*((u(3)+u(4))<0&(u(4)-u(3))>0)+(3*pi/2).*((u(3)+u(4))<0&(u(4)-u(3))<0)+0.*((u(3)+u(4))>0&(u(4)-u(3))<0), (pi/2).*((u(5)+u(6))>0&(u(6)-u(5))>0)+pi.*((u(5)+u(6))<0&(u(6)-u(5))>0)+(3*pi/2).*((u(5)+u(6))<0&(u(6)-u(5))<0)+0.*((u(5)+u(6))>0&(u(6)-u(5))<0), (pi/4).*(u(7)>0&u(8)>0)+(3*pi/4).*(u(7)<0&u(8)>0)+(5*pi/4).*(u(7)<0&u(8)<0)+(7*pi/4).*(u(7)>0&u(8)<0), (pi/4).*(u(9)>0&u(10)>0)+(3*pi/4).*(u(9)<0&u(10)>0)+(5*pi/4).*(u(9)<0&u(10)<0)+(7*pi/4).*(u(9)>0&u(10)<0), (pi/2).*((u(11)+u(12))>0&(u(12)-u(11))>0)+pi.*((u(11)+u(12))<0&(u(12)-u(11))>0)+(3*pi/2).*((u(11)+u(12))<0&(u(12)-u(11))<0)+0.*((u(11)+u(12))>0&(u(12)-u(11))<0), (pi/2).*((u(13)+u(14))>0&(u(14)-u(13))>0)+pi.*((u(13)+u(14))<0&(u(14)-u(13))>0)+(3*pi/2).*((u(14)+u(13))<0&(u(14)-u(13))<0)+0.*((u(13)+u(14))>0&(u(14)-u(13))<0), (pi/4).*(u(15)>0&u(16)>0)+(3*pi/4).*(u(15)<0&u(16)>0)+(5*pi/4).*(u(15)<0&u(16)<0)+(7*pi/4).*(u(15)>0&u(16)<0)]; end