Multiplying sine wave with step function
显示 更早的评论
Hi again!
I'm trying to produce a sampled data vector of a sine wave with the following parameters:
- Amplitude 0.187
- Signal Freq. 187Hz
- Sampling rate 1600s^-1
I am running into an error and cannot figure out what the issue is with element wise multiplication of the step function and the sine wave. Code is as follows:
nn = -3:14; % index vector
uu = double(nn >= 0);% unit step
Ts = 1.6e-3;% sample time
Fs = 1600; % sample rate
t = linspace(-3, 14, Fs); % time
w = 2*pi*187; % omega
xx = 0.187*sin(w*t);% x(t) = 0.187sin(w*t)
xxuu = xx .* uu; % multiplying step function with sine wave
stem(t, xxuu)% stem plot
I am not entirely sure if this is the best way to go about this problem either. My code includes some hints I got from this site.
采纳的回答
Ameer Hamza
2020-11-5
编辑：Ameer Hamza
2020-11-5
I am not sure how you defined 'uu' vector. But the following code works fine
Ts = 1.6e-3;% sample time
Fs = 1600; % sample rate
t = linspace(-3, 14, Fs); % time
uu = 1*(t>=0);
w = 2*pi*187; % omega
xx = 0.187*sin(w*t);% x(t) = 0.187sin(w*t)
xxuu = xx .* uu; % multiplying step function with sine wave
stem(t, xxuu)% stem plot
更多回答（3 个）
madhan ravi
2020-11-5
uu = @(nn) +(nn >= 0);
xxuu = xx .* uu(t)
Paul
2020-11-5
Change one line to:
xxuu = xx .* (t >= tstep); % set tstep as the time when the unit step is applied
类别
在 帮助中心 和 File Exchange 中查找有关 Audio Processing Algorithm Design 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
