Help with signal pulse generation in Simulink

2 views (last 30 days)
Sameer on 11 Aug 2014
Commented: Sameer on 14 Aug 2014
Hi, I have a filtered ECG signal which is exhibiting filtered/enhanced R wave peaks. The sampling frequency is 100 Hz, i.e. a sample every 0.01 second. Now all I want with my model is to generate a pulse (amplitude could be unit) every time a peak is peak is detected. Further I want to generate separate signal pulses after a time delay, say 50 mSec, from the first one.
Please see the attached images from the scope. First one shows filtered, but non threshold-ed output, hence some noise at low amplitude level. Second one shows threshold-ed output to eliminate that noise. Third is a snapshot of my model.
A side note, this signal generation has to be real time, i.e. as the peak is getting detected. Any help will be greatly appreciated.
Thank you.

Answers (1)

A Jenkins
A Jenkins on 11 Aug 2014
You should be able to build something out of the following blocks:
  1 Comment
Sameer on 14 Aug 2014
Thanks for your suggestion. While I understand the usage of transport delay to induce a time difference, I don't understand how you can use Detect Change and Compare to Constant building blocks to detect peaks. Mind you the peak amplitudes are not constant.

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!

Translated by