Compiler/AWR1642: TIDEP-0092: Is the output SNR of MmwDemo_detectedObjActual always greater than zero?

Tool/software: TI C/C++ Compiler

Hi all,

  We now use the SRR demo of awr1642. We would like to use the rangeSNRdB, dopplerSNRdB, and sinAzimSNRLin in the data structure of MmwDemo_detectedObjActual_t. The C code  noted that the rangeSNRdB and dopplerSNRdB are the Log2 function of linear snr value, which I thought they can be negative value. However the data type of them are uint16_t. Is that means the rangeSNRdB and dopplerSNRdB value are always greater than zero? Why is this case?  Below is the data structure definition.

*/
typedef struct MmwDemo_detectedObjActual_t
{
uint16_t rangeIdx; /*!< @brief Range index */
uint16_t dopplerIdx; /*!< @brief Doppler index */

uint16_t range; /*!< @brief Range (meters in oneQformat) */
int16_t speed; /*!< @brief Doppler (m/s in oneQformat) */
int16_t sinAzim; /*!< @brief wx sin(Azim). Q format provides the bitwidth. */

uint16_t peakVal; /*!< @brief Peak value */

uint16_t rangeSNRdB; /*!< @brief Range SNR (dB) */
uint16_t dopplerSNRdB; /*!< @brief Doppler SNR (dB) */
uint16_t sinAzimSNRLin; /*!< @brief omega SNR (linear scale) */

int16_t x; /*!< @brief x - coordinate in meters. Q format provides the bitwidth. */
int16_t y; /*!< @brief y - coordinate in meters. Q format provides the bitwidth. */
int16_t z; /*!< @brief z - coordinate in meters. Q format provides the bitwidth. */

} MmwDemo_detectedObjActual;