function X = dft(x) % --- % function X = dft(x) % input x - N*1 % output X - N*1 N = length(x); n = 0:N-1; k = 0:N-1; X = exp(-j*2*pi/N).^(n'*k) * x; 脚本测试 & 结果 fs = 1/0.0001; t = -0.1:1/fs:0.1; x1 = 1*sin(2*pi*1000*t); x2...
function [ak, bk, wk] = CFS(t,y,period) % 1.输入接口:取周期主值 py = y; idx = union(find(t<0),find(t>=period)); py(idx)=[]; % 2.计算傅里叶双边谱 n = length(py); Fk1 = fft(py,n)/n; % 3.将双边谱转换为单边谱 Fk1 = fftshift(Fk1); Fk2 = conj(Fk1); % 4...
下面是一个使用dft.m函数的示例: N =8;% DFT lengthx = [12344321];% Input sequence% Compute DFT using dft.mX = dft(x, N);% Compute DFT using built-in fft functionX_fft = fft(x, N);% Compare resultsdisp(norm(X - X_fft)); 上述代码中,我们首先定义了一个函数dft,用于计算输入序列x...
The Galois field over which this function works must have 256 or fewer elements. In other words, alph must be a primitive nth root of unity in the Galois field GF(2m), where m is an integer between 1 and 8. Algorithms The element dm(a,b) equals alph^((a-1)*(b-1)). ...
function y = cirshftf(x,m,N) % Circular shift m samples in sequence x over[0:N-1](frequency domain) % ___ % y = cirshftf(x,m,N) % y = output sequence containing circular shift % x = input sequence of length <= N % m = ...
MATLAB Answers I'm getting this error as shown below 1 답변 Problem using multiplication inside function 1 답변 how to create a dft function without using other functions of matlab 1 답변 전체 웹사이트 DimFunc File Exchange ...
Explore DFT frequency accuracy, got stuck. Learn more about dft, discrete fourier transform, matlab, digital signal processing MATLAB
function y = cirshftt(x,m,N) % Circular shift of m samples in sequence x over 0:N-1(time domain) % ___ % y = cirshftt(x,m,N) % y = output sequence containing the circular shift % x = input sequence of length <= N ...
【摘要】 上篇博文:【 MATLAB 】DFT的性质讨论(二)序列的循环移位及其 MATLAB 实现(时域方法) 提到了对序列x(n)做循环移位后的DFT形式为: 上篇博文已经讨论过了第一种实现循环移位的方法,通过在时域中对序列移位,之后取模运算,得到循环移位。并给出了精辟地验证。可以很放心的使用。 这篇博文呢?我们就通过序列...
用MAtlaB进行DFT及FFT频谱分析和运算结果的比较的实验 DSP MATLAB上机实验一班级:学号:姓名:函数代码:function xn()format long q=0.9+0.3*i; wn=exp(-2*pi*i/32); xn=q.^[0:31] xk1=(1-q^32)./(1-q*wn.^[0:31])%利用公式计算XK的理论值 xk2=fft(xn,32)%运用基二基2时间抽选的FFT算法...