IWR1443BOOST: Zomm FFT

Akshay Patel1

Part Number: IWR1443BOOST

Hi team,

For high accuracy, zoom FFT is performed on 4 samples around course peak. I checked MmwDemo_processInterpolation function in datapath.c file. After performing zoom-FFT, fine peak is searched around starting 128 output samples. No of output samples from zoom-FFT is 16384.

Why fine peak is not searched from all 16384 sample? Is zoom-FFT is performed on all input samples (512) or only 4 sapmles around peak?

Thanks,

Akshay

over 5 years ago

0 Akash Gondalia over 5 years ago

TI__Guru 50240 points

Hi Akshay,

It is actually neither, it is dependent on the size of the coarse peak that is found and the number of coarse peaks that it goes through.

Cheers,

Akash

0 Akshay Patel1 over 5 years ago in reply to Akash Gondalia

Intellectual 690 points

Hi Akash,

I didn't understand what you mean by size of the coarse peak. I thought there is one course peak and zoom-FFT is performed around this peak ( I am referring to high accuracy FW). My question is

Why fine peak is not searched from all 16384 sample output received after DFT?
Is zoom-FFT is performed on all input ADC samples (512) or only 4 samples around course peak?

0 Akshay Patel1 over 5 years ago in reply to Akshay Patel1

Intellectual 690 points

Hi,

Any Updates. . .

Regards,

Akshay

0 Akshay Patel1 over 5 years ago in reply to Akshay Patel1

Intellectual 690 points

Any Updates. .

Regards,

Akshay

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IWR1443BOOST: Zomm FFT