CCS/IWR1642: How is the IWR1642BOOST 1D FFT data arranged? Is the I, Q arrangement? Where is the relevant information? Thank you

Hi ZHG,

The Radar cube data arrangement in L3 after 1D-FFT is described in the OOB demo doxygen under Data Path - 1st Dimension FFT Processing. The data type is cmplx16ReIm_t which is defined in  C:\ti\mmwave_sdk_02_01_00_04\packages\ti\common\sys_common.h as shown below.

/*! @brief  Complex data type. This type of input, (first real than
 * imaginary part), is required for DSP lib FFT functions */
typedef struct cmplx16ReIm_t_
{
    int16_t real; /*!< @brief real part */
    int16_t imag; /*!< @brief imaginary part */
} cmplx16ReIm_t;

On little endian architecture, the real part will be stored in the lower-16 bits (i.e. lower address) and imaginary part will be stored in the upper 16-bits (higher address).

Regards

-Nitin