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KChin.7
KChin.7
Visitor II
October 24, 2019
Question

How can i Get Lower FFT step size for Higher ODR Values- STEVAL-IDP005V1 - Condition Monitoring?

  • October 24, 2019
  • 1 reply
  • 676 views

In STEVAL-IDP005V1 - Condition Monitoring, I have set FFT_SIZE_MAX as 2048. Instead of ISM330DLC, i am using Higher ODR Acceleration sensor. As FFT step size( Delta f) is directly proportional to ODR, i am unable to get lower FFT step size( Like 0.5Hz) for higher ODR values.

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1 reply

Ozone
Ozone
Principal
October 24, 2019

The size of 2048 was (is?) the maximal size implemented in ARM's DSP package the FFT code is obviously based on. I didn't check recently, though.

You might investigate alternative FFT implementations.

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