Keil forum CMSIS DSP bit reverse table lengths

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CMSIS DSP bit reverse table lengths

developerR over 5 years ago

Hi

can someone please explain why these 4096 tables have table lengths of 4032 ?

#define ARMBITREVINDEXTABLE_4096_TABLE_LENGTH ((uint16_t)4032)

#define ARMBITREVINDEXTABLE_FIXED_4096_TABLE_LENGTH ((uint16_t)4032)

I would like to know the formula that generates the 4032 so that I can produce other table sizes

Thank you

developerR

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developerR over 5 years ago in reply to Westonsupermare Pier +1 verified

Hi Weston Thank you for your response. I have seen elsewhere that table size is square root of radix times square root of fft size. But none of these numbers tally. It would be good to be able to...

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+1 developerR over 5 years ago in reply to Westonsupermare Pier

Hi Weston

Thank you for your response.

I have seen elsewhere that table size is square root of radix times square root of fft size. But none of these numbers tally.

It would be good to be able to dervive this number

regards

developerR
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+1 developerR over 5 years ago in reply to Westonsupermare Pier

Hi Weston

Thank you for your response.

I have seen elsewhere that table size is square root of radix times square root of fft size. But none of these numbers tally.

It would be good to be able to dervive this number

regards

developerR
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