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

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Vida 2013-5-14

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评论： Walter Roberson 2022-12-21

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?

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Greg Dionne 2017-9-1

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

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Abdelwahab Afifi 2020-10-24

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?

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Matt J 2013-5-14

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

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Justine Nyakundi 2017-8-30

this gives an error 'not monotonically increasing'

Jan 2017-8-30

编辑：Jan 2017-8-30

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

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Jan 2013-5-14

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编辑：Jan 2013-5-14

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.