In automotive mrr demo dss_main.c,
The function convertSNRdBtoThreshold is called in MmwDemo_populateMRR as:
/*! @brief CFAR thresholds are varied as a function of range */
obj->SNRThresholds[0].rangelim = (uint16_t) (6.0f * (float)(1U << obj->xyzOutputQFormat));
obj->SNRThresholds[0].threshold = convertSNRdBtoThreshold(1, 16.0f, CFARTHRESHOLD_N_BIT_FRAC);
The first parameter is 1.
But the description of the function convertSNRdBtoThreshold says the first parameter is the number of virtual antennas.
/**
* @b Description
* @n
* Converts an SNR (in dB) to an SNR Threshold that the CFAR algo
* can use.
* @param[in] number of integrations in the detection matrix
* Typically the number of virtual antennas
* @param[in] Threshold in dB (float)
*
* @retval
* Threshold for CFAR algorithm.
*/
uint16_t convertSNRdBtoThreshold(uint16_t numInteg, float ThresholdIndB,uint16_t bitwidth)
{
float scaleFac = (float) ((1 << bitwidth) * numInteg);
float convertFrom_10Log10_to_20Log2 = ThresholdIndB * (1.0f / 6.0f);
return (uint16_t) (scaleFac * convertFrom_10Log10_to_20Log2);
}
In the AWR1843Boost, the number of virtual antennas is 3*4 = 12.
Should I change the value of 1st parameter to 12 instead of 1?
Kind regards
