IWR1443BOOST: FFT Function

Patrick Kouatchou

Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443

Hallo,

i would like to receive the matlab code for 1D FFT and 2D FFT for the IWR1443BoOST. I should mention, the data i would like to do the FFT on, i have them from the M[0] HWA memory. In the vital Sign Lab, it is called VITALSIGNS_HWA_1D_ADCBUF_INP (&gMmwHwaMemBuf[0]).

would you please tell me before hand, if the code will work on the data from this data, or should i do first another operation on the data before i do the FFT on them.

Best regards

over 4 years ago

0 zigang Yang over 4 years ago

TI__Mastermind 36485 points

HI,

We do not have a MATLAB matching model for the 1D and 2D FFT operation for hardware accelerator. You can find some doxygen documentation for 1D and 2D FFT information below.

file:///C:/ti/mmwave_sdk_02_01_00_04/packages/ti/demo/xwr14xx/mmw/docs/doxygen/html/index.html

Best,

Zigang

0 Patrick Kouatchou over 4 years ago in reply to zigang Yang

Prodigy 240 points

Hi Yang,

Thank you for the answer. But that really won't help me. Isn't there anyway for you, to give me a code i can use? even a template would be enough

0 zigang Yang over 4 years ago in reply to Patrick Kouatchou

TI__Mastermind 36485 points

HI,

As I said, we do not have a matching model. All the source code is there in the vital sign lab, you need to figure out yourself. To help you understand 1D and 2D FFT, below are some pseudo code. You may need to apply FFT windowing before fft function and use fftshift for 2D FFT.

Best,

Zigang

%% Radar signal processing, assume adcOut is three-dimensional data with size of (numADCSampPerChirp, numLoop, totalNumVisualAnt)

% 1D range-FFT across the 2nd dimensions (samples),

fftSize1D = size(adcOut,1);
radar_data_1dFFT = fft(adcOut,[], 1);

% 2D vel-FFT across the 3nd dimensions (chirps)
fftSize2D = size(adcOut, 2);
radar_data_2dFFT = fft(radar_data_1dFFT,[], 2);

0 Patrick Kouatchou over 4 years ago in reply to zigang Yang

Prodigy 240 points

Hi Zigang,

first thank you for the answer.

When you say ADC output is a three dimensional data .(numADCSampPerChirp, numLoop, totalNumVisualAnt). how many bites does each have?

Let's say for example I have this data FFFFFFFF. Which byte correspond to numADCsamplesPerChirp...

would be great if you had a data structure for the ADC BUFF Data.

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IWR1443BOOST: FFT Function