Fractional delay FIR filter design

How can I design fractional delay FIR filter in the fastest way in matlab?

I want minimum computational time. Shall I use the inbulit function or design it myself?

If designing will be faster then how to design it?

Answer 1

[Abhimenyu]

Hi Nidhi,

I understand that you want to design fractional delay FIR filter using MATLAB. The fractional delay FIR filter is an FIR approximation of an ‘ideal sinc shift filter’ with a specified fractional (non-integer) delay value ‘fd’ within [0,1].

The fastest and the most efficient method is to use the MATLAB built-in function: ‘designFracDelayFIR’. This function offers a convenient and optimized way to design fractional delay FIR filters with specified delay, filter length or combined bandwidth, making it a good choice for achieving minimum computational time.

Please refer to the MATLAB documentation link below to understand more about the ‘designFracDelayFIR’ function and its examples:

https://www.mathworks.com/help/dsp/ref/designfracdelayfir.html

I hope this helps!

Thank you,

Abhimenyu