CMSIS-DSP, real value FFT (RFFT) with fixed point values

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RaAl_264636
Level 6
Level 6
50 sign-ins 25 sign-ins 10 solutions authored

Hi,

   

 

   

has anyone used the CMSIS-DSP RFFT_Q15 implementation yet? Currently I'm feeding it with predefined values to check if I understand it correctly, but the output has negative values for the frequency bins, and I don't know why. For my understanding the output should be only positive values.

   

 

   

Regards,

   

 

   

Ralf

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himam_31
Employee
Employee
50 likes received 25 likes received 10 likes received

Hello 

   

 

   

We do not have an example project for this.Can yo please have a look at this thread http://www.cypress.com/forum/psoc-5-device-programming/1024-points-fft-cmsis

   

 

   

Thanks,

   

Hima

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