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www.eeworm.com/read/353524/10441540
m ex041300.m
% 第四章: 例4.13:
% z-平面函数:
% b)
b = [1,0,-1]; a = [1,0,-0.81];
[R,p,C] = residuez(b,a);
% d)
w = [0:500]*pi/500;
[H]=freqz(b,a,w);
magH = abs(H);phaH = angle(H);
subplot(2,1,1),plot(w/pi,magH)
www.eeworm.com/read/353523/10441559
m ex030400.m
%第三章: 例3.4:
% 用矩阵-向量乘法求有限长序列的DTFT
%
n = -1:3; x = 1:5; % x(n)序列
k = 0:500; w = (pi/500)*k; % [0, pi] 轴分为501点.
X = x * (exp(-j*pi/500)) .^ (n'*k); % 用矩阵-向量乘法求DTFT
magX
www.eeworm.com/read/353523/10441585
m ex030600.m
% 第三章: 例 3.6:
%
subplot(1,1,1)
n = -5:5; x = (-0.9).^n;
k = -200:200; w = (pi/100)*k;
X = x * (exp(-j*pi/100)) .^ (n'*k);
magX = abs(X); angX =angle(X);
subplot(2,1,1); plot(w/pi,magX);grid
ax
www.eeworm.com/read/353523/10441588
m ex031200.m
% 第三章: 例 3.12:
%
n = -5:10; x = sin(pi*n/2);
k = -100:100; w = (pi/100)*k; % -pi和+pi之间的频率
X = x * (exp(-j*pi/100)).^(n'*k); % x的DTFT
% 信号分解
[xe,xo,m] = evenodd(x,n); % 偶部和奇部
www.eeworm.com/read/353523/10441595
m ex030900.m
% 第三章: 例 3.9:
%
n = 0:100; x = cos(pi*n/2);
k = -100:100; w = (pi/100)*k; % 把 -pi 到 +pi 分为201点
X = x * (exp(-j*pi/100)).^(n'*k); % x 的 DTFT
%
y = exp(j*pi*n/4).*x; % 把信
www.eeworm.com/read/353523/10441597
m ex030300.m
% 第三章: 例 3.3:
%
w = [0:1:500]*pi/500; % 把[0, pi] 轴分为501点.
X = exp(j*w) ./ (exp(j*w) - 0.5*ones(1,501));
magX = abs(X); angX = angle(X);
realX = real(X); imagX = imag(X);
subplot(2,2,1); plot(w/
www.eeworm.com/read/353523/10441609
m ex039900.m
% 第三章: 例 3.99:
%
w = [-100:100]*pi/100; % -pi and +pi之间的频率
N = 5;
X1 = sin((w+eps)*N/2)./sin((w+eps)/2);
N = 15;
X2 = sin((w+eps)*N/2)./sin((w+eps)/2);
N = 25;
X3 = sin((w+eps)*N/2)./sin((w+ep
www.eeworm.com/read/353523/10441622
m ex030500.m
% 第三章: 例 3.5:
%
subplot(1,1,1)
n = 0:10; x = (0.9*exp(j*pi/3)).^n;
k = -200:200; w = (pi/100)*k;
X = x * (exp(-j*pi/100)) .^ (n'*k);
magX = abs(X); angX =angle(X);
subplot(2,1,1); plot(w/pi,mag
www.eeworm.com/read/353523/10441637
m ex031300.m
% 第三章: 例 3.13:
%
w = [0:1:500]*pi/500; % 把[0, pi]轴分为501个点
X = exp(j*w) ./ (exp(j*w) - 0.9*ones(1,501));
magX = abs(X); angX = angle(X);
subplot(2,1,1); plot(w/pi,magX); grid; axis([0,1,0,10])
x
www.eeworm.com/read/424481/10443342
c main.c
/*-------------------------------------------文件main.c----------------------------------------------*/
#include "key.c"
#include "miner.c"
int main(){
int gameRes; /*记录游戏结束的结果状态：0表示退出游戏；-1游戏失败；