How to integrate LFM signal into pulse

45 次查看（过去 30 天）
tinkyminky93
tinkyminky93 2022-1-13
评论： Chunru 2022-1-14
I am trying to generate a Linear Frequency Modulated (LFM) Pulse waveform like below.
I generated periodic chirp signals but the problem is i can not put inside these chirps into pulse boundaries. I mean outside of the duty cycle is not zero. How can I solve this problem? By the way, I am not using a toolbox. Thank you for your help.

请先登录，再回答此问题。

采纳的回答

Chunru
Chunru 2022-1-14
编辑：Chunru 2022-1-14
Ran in:
fl = 100; % Hz
fu = 200;
fs = 1000;
pw = 0.1; % sec
pri = 1; % sec
% LFM
t = (0:1/fs:pw)';
x = cos(2*pi*(fl*t + .5*(fu-fl)/pw*t.^2));
% One pulse
x(end+1:round(pri*fs)) = 0;
% Npulses
Npulses = 3;
y = repmat(x, [3 1]);
t = (0:length(y)-1)'/fs;
plot(t, y)
  8 个评论
显示 6更早的评论
tinkyminky93
tinkyminky93 2022-1-14
I mean the Signals positive peak is 1 and the negative peak is -1. I want the signal to oscillate between 0 and 1.
---------------------
My fs is 1000 for this situation, what should I use for only just upchirp?
Chunru
Chunru 2022-1-14
Ran in:
You can try the following (but you need to know why your need to have that kind of amplitude):
fl = 100; % Hz
fu = 200;
fs = 1000;
pw = 0.1; % sec
pri = 1; % sec
% LFM
t = (0:1/fs:pw)';
x = 0.5*(1+cos(2*pi*(fl*t + .5*(fu-fl)/pw*t.^2)));
plot(t, x)

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Waveform Generation 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by