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N=8; n=[-(N-1)/2 : (N-1)/2]'; us=0; u1=0.4,u2=-0.6; Vs=exp(-j*pi*us*n); V1=exp(-j*pi*u1*n); V2=exp(-j*pi*u2*n); p=20,q1=10,q2=20; SNR=10^(p/10); INR1=10^(q1/10); INR2=10^(q2/10); Rx=SNR*Vs*

x = cos((0:63)/64*2*pi); [c,L] = wavedec(x,'haar',6); plot(wrcoef('a',c,L,'haar',2));pause; plot(wrcoef('d',c,L,'haar',2));

function q = IntQBXF2(func,n) format long; pi = 3.1415926535; q = 0; A = zeros(n,1); x = zeros(n,1); for i=1:n A(i) = sin((i*pi)/(n+1))*sin((i*pi)/(n+1))*pi/(n+1); x(i) = cos(pi*i/(n+1

function q = IntQBXF1(func,n) format long; pi = 3.1415926535; q = 0; A = zeros(n,1); x = zeros(n,1); for i=1:n A(i) = pi/n; x(i) = cos(pi*(2*i-1)/2/n); y(i) = subs(sym(func), find

%例程4－5 基于巴特沃斯模拟滤波器设计数字带阻滤波器 Wp=[0.4*pi,0.7*pi]; Ws=[0.2*pi,0.8*pi]; Ap=1; As=30; [N,wn]=buttord(Wp/pi,Ws/pi,Ap,As); %计算巴特沃斯滤波器阶次和截止频率 [b,a]=butter(N,wn,'stop'); %频率变换法设计巴特沃斯带通滤波器 [db,

%例程4－4 基于巴特沃斯模拟滤波器设计数字带通滤波器 Wp=[0.3*pi,0.4*pi]; Ws=[0.2*pi,0.5*pi]; Ap=3; As=18; [N,wn]=buttord(Wp/pi,Ws/pi,Ap,As); %计算巴特沃斯滤波器阶次和截止频率 [b,a]=butter(N,wn,'bandpass'); %频率变换法设计巴特沃斯带通滤波器

clear; Fs=1000; N=256; M=64; t=0:1/Fs:(N-1)/Fs; %信号的幅度 A1=sqrt(10^(30/10)); A2=A1; A3=sqrt(10^(27/10)); %产生均值为0，方差为1的复高斯白噪声序列 phi=2*pi*rand; Noise=randn(1,N)*exp(j*phi); %三个复正弦信号 S=A1*exp

function phase=princarg(phase_in) phase=mod(phase_in+pi,-2*pi)+pi;

% %function p = pulse(t,tau) % function p = gaussian_pulse(A,t,alpha) p = A*exp(-2*pi*(t/alpha).^2); return

%例程3-4 产生锯齿波形 Fs=1000; t=0:1/Fs:3; x=sawtooth(2*pi*t); y=sawtooth(2*pi*t,0.5); z=sawtooth(2*pi*t,1); subplot(3,1,1); plot(t,x); subplot(3,1,2); plot(t,y); subplot(3,1,3); plo