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#include #include const double PI=3.14159; double area(double); void main( ) { double r,s; SCON = 0x50; TMOD |= 0x20; TH

#include #define pi 3.1415 double gaussian(double x) { double resu; resu=-0.5*x*x; resu=exp(resu); resu=resu/sq

void trans(int *p,int n) { int i,j,temp; int *pi,*pj; for(i=0;i

% Chapter 05: Example 05.08 % High density vs HiRes Spectrum % % signal x(n) subplot(1,1,1); n = [0:1:99]; x = cos(0.48*pi*n)+cos(0.52*pi*n); % % Spectrum based on the first 10 samp

% 第五章: 例5.8: 高分辨率频谱 % % 基于信号x(n)的100个样本的高分辨率频谱 subplot(1,1,1) n=[0:1:99]; x=cos(0.48*pi*n)+cos(0.52*pi*n); subplot(2,1,1);stem(n,x);title('信号x(n), 0

% 第五章: 例 5.6: 简单DFT的实例 % x = [1,1,1,1]; subplot(1,1,1); % % a) DTFT w = [0:1:500]*2*pi/500; [H] = freqz(x,1,w); magH = abs(H); phaH = angle(H); phaH(126)=-47.5841*pi/180; subplot(2,1,1); plot

% 第五章: 例 5.7:填补零点的实例 % subplot(1,1,1); x = [1,1,1,1]; % % a) DTFT w = [0:1:500]*2*pi/500; [H] = freqz(x,1,w); magH = abs(H); phaH = angle(H); phaH(126)=-47.5841*pi/180; % % b) 8-point DFT N

% 第六章：例6.7 % 频率采样形式: 给定频率样本 % M = 32; alpha = (M-1)/2; k = 0:M-1; wk = (2*pi/M)*k; magHk = [1,1,1,0.5,zeros(1,25),0.5,1,1]; k1 = 0:15; k2 = 16:M-1; angHk = [-alpha*(2*pi)/M*k1, alpha*(2*pi)/M*(M

% 第七章: 例 7.22 % 误差函数图和极值的数目 figure(1);subplot(1,1,1) h = [1,2,3,4,3,2,1]/15; M = length(h); n = 0:M-1; [Hr,w,a,L] = Hr_Type1(h); subplot(1,2,1);plot(w/pi,Hr);axis([0,1,-0.05,1.1]) xlabel('频率（单位

% 第七章: 例 7.16 % 频率采样技术: 低通, 最优法T1 & T2 % wp = 0.2pi, ws=0.3pi, Rp=0.25dB, As=50dB % T1 = 0.5925, T2=0.1099 M = 60; alpha = (M-1)/2; l = 0:M-1; wl = (2*pi/M)*l; Hrs = [ones(1