How can I delay a chirp signal for signal processing?

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majid 2021-4-24

评论： Mathieu NOE 2021-4-26

I have a question, how can i delay chirp signal? for example 6.5microsecond?

code:

% chirp signal generation 0-75 Hz ,7 chirp

clear all

clc

hchirp = dsp.Chirp('SweepDirection', 'unidirectional', 'TargetFrequency', 75, 'InitialFrequency', 0,...

'TargetTime', 1,'SweepTime', 1, 'SamplesPerFrame', 1176, 'SampleRate', 168);

figure(1);

plot(step(hchirp));

axis tight

xlabel('time (second)')

ylabel('signal amplitude')

% 6.5 microsecond signal delay.

hchirp_delayed=???

Thank you!

Mathieu NOE 2021-4-26

hello

you have to padd your signal with enough zeros to match the 6.5 microsecond signal delay (depends of your sampling frequency :

samples = round(6.5e-6/Fs);

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