How to upsample an RF signal by a non-integer factor.

Hello,

I want to upsample an RF signal by a factor of 2.5 (from 20 MHz to 50 MHz). But the MATLAB function "upsample" only works for integer factors. I know of the "resample" function, but it can only work on double precision vectors. But the problem is, my RF signal after getting read is a three-dimensional int16 data (1032x128x405 int16),

Any help or suggestion on this will be greatly appreciated.

[David K.]

Instead of upsampling by 2.5 (5/2) you can actually upsample by 5 and then downsample by 2 in order to effectively upsample by 2.5.

This website appears to go over the theory well enough.