if anyone can answer for the Questions B1,A2 & A3 ? the questions are posted below in the code

1 次查看（过去 30 天）

Mohammod Rahat Ferdous 2022-5-23

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1724965-if-anyone-can-answer-for-the-questions-b1-a2-a3-the-questions-are-posted-below-in-the-code

评论： Matt J 2022-5-23

% B. Effect of a signal cut on the size of a leak 
clear; clc;
fs=30; fx=3;                                                        
N0=100;                         %  without leakage
t0=0:1/fs:(N0-1)/fs;
y0=sin(2*pi*t0*fx);
f0=fs*(0:length(y0)-1)/length(y0);
Y0=fft(y0);
N=91.99;                           %  with leakage
t=0:1/fs:(N-1)/fs;
y=sin(2*pi*t*fx);
f=fs*(0:length(y)-1)/length(y);
Y=fft(y);
subplot(2,1,1); stem(f0,(2/N0)*abs(fft(y0)),'.');grid; legend('N_0=100','Location','north');
xlabel('f[Hz]');ylabel('Y0');
subplot(2,1,2); stem(f,(2/N)*abs(fft(y)),'.');grid;legend('N=?','Location','north');
xlabel('f[Hz]');ylabel('Y')
% B1. Find the value of N at which the maximum leakage occurs. N between [91.99]
% A2. Determine the frequency of the bin in the spectrum Y0, i.e. for N0 = 100.
% A3. Determine the frequency of the two largest fringes in the spectrum Y.
%     for the case of a spectrum with maximum leakage.
%_____________________________________________________________________ 