滤波器基于matlab高斯滤波器【含Matlab源码 995期】.zip

t1=-1.5:0.01:1.5; t2=-1.5:0.01:1.5; %b1=ones(1,length(t2)); b1=[zeros(1,100),ones(1,100),zeros(1,101)]; %产生滤波器1 y1=sqrt(pi)/0.25*exp(-((pi*t1).^2)/0.25.^2); z1=0.5*(erfc(pi/0.25*(t1-0.5))-erfc(pi/0.25*(t1+0.5))); %产生滤波器2 y2=sqrt(pi)/0.5*exp(-((pi*t1).^2)/0.5.^2); z2=0.5*(erfc(pi/0.5*(t1-1))-erfc(pi/0.5*(t1+1))); %产生滤波器3 y3=sqrt(pi)*exp(-(pi*t1).^2); z3=0.5*(erfc(pi*(t1-1))-erfc(pi*(t1+1))); %产生滤波器4 y4=sqrt(pi)/2*exp(-((pi*t1).^2)/2.^2); z4=0.5*(erfc(pi/2*(t1-1))-erfc(pi/2*(t1+1))); subplot(3,1,1),plot(t2,b1);axis([-1.5 1.5 0 1.2]);xlabel('t/T');ylabel('b(t)'); title('高斯脉冲成形滤波器的输入（矩形脉冲）'); subplot(3,1,2),plot(t1,y1,'r',t1,y2,'g',t1,y3,'b',t1,y4,'m'); legend('\alpha=0.25','\alpha=0.5','\alpha=1','\alpha=2'); xlabel('t/T');ylabel('h(t)');title('高斯脉冲成形滤波器的冲激响应h(t)'); subplot(3,1,3),plot(t1,z1,'r',t1,z2,'g',t1,z3,'b',t1,z4,'m');xlabel('t/T');ylabel('g(t)'); legend('\alpha=0.25,','\alpha=0.5','\alpha=1','\alpha=2'); axis([-1.5 1.5 0 1.2]); title('高斯脉冲成形滤波器的输出');