How to create a square wave signal

21 次查看（过去 30 天）
Benedetta Bonini
Benedetta Bonini 2021-5-9
评论： Benedetta Bonini 2021-5-11
I have to create a square wave of amplitude 0.19 and period 495 samples and I don't know how to do. I just have understood that in Matlab there is the command x=square(t) but I really don't know how to represent my period and my amplitude. Could someone help me please?
  5 个评论
显示 3更早的评论
Jonas
Jonas 2021-5-10
yes and no. samples per period refers to sampling frequency. normally you want a frequency e.g. of 2 Hz, which means 2 per second. during that second the signal is sampled several times which refers to the sampling frequency
Adam Danz
Adam Danz 2021-5-10
This answer demonstrates a parameterized step function but you need to know the period and what you're describing is the number of samples within a period.
https://www.mathworks.com/matlabcentral/answers/796282-how-do-i-make-this-square-wave-graph#answer_670442

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Scott MacKenzie
Scott MacKenzie 2021-5-10
编辑：Scott MacKenzie 2021-5-11
Here's a brute-force solution. It's a bit odd, but it does create a square wave according to your specs (with one extra sample to round out the math):
amplitude = 0.19;
samples = 496;
y = [ones(1,samples/2)*amplitude/2, ones(1,samples/2)*amplitude/2*-1];
plot(y);
Just having a bit of fun with this. The code below adds a variable cycles to output >1 cycle, if desired.
amplitude = 0.19;
samples = 496; % per cycle
cycles = 5;
y = [ones(1,samples/2)*amplitude/2, ones(1,samples/2)*amplitude/2*-1];
y = repmat(y, 1, cycles);
plot(y);
Here's a more compact and concise approach... (same output as above)
amplitude = 0.19;
samples = 496;
cycles = 5;
y = repmat([amplitude/2 -amplitude/2], samples/2, cycles);
y = y(:);
plot(y);

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Spectral Measurements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by