is it possible to upsampling or down sampling by a non-integer number?

I have two files that I need to synchronise one is sampled at every 3ms = 1/0.003 = 333.33Hz and one at every 10ms = 1/0.01 = 100Hz. I have not been able to find a matlab command in basic or signal processing toolbox to either upsample to 100Hz to 333.33 or downsample 333.33 to 100Hz. Can anyone help?

Answer 1

[Greg Dionne]

In case someone else is looking at this... have a look at resample.

[Abdelwahab Afifi]

I'm using resample function to upsample my data. I need to increase the stop band attenuation to improve the Adjacent channel power ratio (ACPR) . How can i do that?

Answer 2

[Matt J]

You need to interpolate, e.g., using interp1() or griddedInterpolant()

[Justine Nyakundi]

this gives an error 'not monotonically increasing'

[Jan]

@Justine: The message is clear. The interpolation requires strict monotonically increasing data as input. Obviously your code provides something else.

Answer 3

[Jan]

Matlab's upsample and downsample are not really useful here. I'd prefer the alreayd mentioned interp1, but decimate would perform an anti-aliasing also.

[MAT-Magic]

Dear Jan,

I have a signal sampled at 26 Hz. I want to downsample that signal to 5.2 Hz. Do you know that how to do it? Thanks in advance.

[Walter Roberson]

 resample(signal, 5, 1)

[kim zheng cho]

Hi and good day

I have a signal sampled at 4552 Hz. I want to downsample that signal to 4096 Hz. Do you know that how to do it?

thank you

[Walter Roberson]

resample 569, 512