北航信号与系统第一次实验报告超级详细版.doc

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1、信号与系统实验一连续时间系统卷积的数值计算实验目的1加深对卷积概念及原理的理解；2掌握借助计算机计算任意信号卷积的方法。实验原理卷积实验流程图源程序#includefloatu(floatt){while(t>=0)return(1);while(t<0)return(0);}floatf1(floatt){return(u(t+2)-u(t-2));}floatf2(floatt){return(t*(u(t)-u(t-2))+(4-t)*(u(t-2)-u(t-4)));}main(){floatt,i,j,re

2、sult=0;for(i=-2;i<=6;i=i+0.1){result=0;for(j=0;j<=4;j=j+0.1)result+=f2(j)*f1(i-j)*0.1;printf("%.1ft%.2ft",i,result);}printf("");}实验数据-2.00.00-1.90.01-1.80.03-1.70.06-1.60.10-1.50.15-1.40.21-1.30.28-1.20.36-1.10.45-1.00.55-0.90.66-0.80.78-0.70.91-0.61.05-0.51.20-0.41

3、.36-0.31.53-0.21.71-0.11.900.02.100.12.290.22.470.32.640.42.800.52.950.63.090.73.220.83.340.93.451.03.551.13.641.23.721.33.791.43.851.53.901.63.941.73.971.83.991.94.002.04.002.13.992.23.972.33.942.43.902.53.852.63.852.73.792.83.722.93.643.03.553.13.453.23.343.33.223.43.

4、093.52.953.62.803.72.643.82.473.92.294.02.104.11.904.21.714.31.534.41.364.51.204.61.054.70.914.80.784.90.665.00.555.10.455.20.365.30.285.40.215.50.155.60.105.70.065.80.035.90.016.00.00绘制曲线总结实验二连续时间系统的频率响应实验目的1加深对连续时间系统频率响应理解；2掌握借助计算机计算任意连续时间系统频率响应的方法实验源程序#include

5、h>#includeintm,n,u=0;floata[100][2],b[100][2];voidlaf(){inti,o;printf("thenumberofzeropoint:");scanf("%d",&m);printf("Lafthezeropoint.(x,y)");for(i=1;i<=m;i++){printf("%d:",i);scanf("%f,%f",&a[i][0],&a[i][1]);}printf("thenumberofpolepoint:");scanf("%d:",&n

6、);printf("inputthepolepoints.(x,y)");for(o=1;o<=n;o++){printf("%d:",o);scanf("%f,%f",&b[o][0],&b[o][1]);}}程序框图floatr(floatx,floaty,floatz){returnsqrt(x*x+(y-z)*(y-z));}floatp(floatx,floaty,floatz){constfloatpi=3.1415927;floatt;if(x==0){t=pi/2;}elset=atan((y-z)/x);if(x

7、>0)t=pi+t;returnt;}voidmain(){floatf,Ts=0.1,h,w,mo,ao;inte;laf();for(f=0;f<=5;f=f+Ts){h=1;w=0;mo=1;ao=0;for(e=1;e<=m;e++){h=h*r(a[e][0],a[e][1],f);w+=p(a[e][0],a[e][1],f);}for(e=1;e<=n;e++){mo=mo*r(b[e][0],b[e][1],f);ao+=p(b[e][0],b[e][1],f);}h=h/mo;w=w-ao;printf("%.1f%

8、5.3f%5.3f;",f,h,w);u++;if(u%3==0)printf("");}printf("");}实验数据thenumberofzeropoint:1Lafthezeropoint.(x,y)1: