how to apply windowing in matlab in real time?

i have continuous set/stream of data coming from serial port to MATLAB. this data is noisy so i want to do smoothing. how can i do smoothing for " real-time data"? should i need to use windowing method or is there any other method? please help me out.

Answer 1

[Ced]

Depends a bit what kind of filter you want. Butterworth or moving average filters are quite common because they are the simplest.

I usually e.g. precompute the butterworth filter coefficients using butter, and then apply them to the incoming stream manually.

[Gowrishankar R]

i want to use moving average filter. please give any link/documentation for coding the moving average filter using windowing in real-time.

[Ced]

Just google it, you will find a million results.

I quite like this book: A Scientists and Engineers Guide to Digital Signal Processing

It's not too technical and skips a lot of theory, but great as introductory literature for applications.