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

2013 5 14
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更新时间：2022 12 21
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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
Greg Dionne 2017-9-1

3 个投票

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

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Abdelwahab Afifi
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
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
Justine Nyakundi 2017-8-30
this gives an error 'not monotonically increasing'
Jan
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
Jan 2013-5-14
编辑：Jan 2013-5-14

1 个投票

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.

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MAT-Magic
MAT-Magic 2020-1-10
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.
kim zheng cho
kim zheng cho 2022-12-21
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

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