wb4.m

原名：数字信号处理基础及MATLAB实现,解压缩密码：[e-mail]

function WB4
% 生成布莱克曼窗，k=4,及其频率特性
n=[0:39];
WB4=[0.35875-0.48829*cos(2*pi*n/39)+0.14128*cos(4*pi*n/39)-0.01198*cos(6*pi*n/39)];     %生成布莱克曼窗
[h,w]=freqz(WB4,1);
subplot(2,2,1);stem(WB4);title('WB4')
AXIS([0 39 0 1]) 
subplot(2,2,2);plot(w/pi,20*log(abs(h)/abs(h(1))));title('H(W)')
grid