Type Alias a121_sys::acc_config_prf_t
source · pub type acc_config_prf_t = c_uint;Expand description
@brief Pulse Repetition Frequency
Pulse Repetition Frequency, PRF, is the frequency at which pulses are sent out from the radar system. The measurement time is approximately proportional to the PRF. The higher the PRF, the shorter the measurement time.
This parameter sets the Maximum Measurable Distance, MMD, that can be achieved. MMD is the maximum value for the end point, i.e.,the start point + (number of points * step length). For example, an MMD of 7.0 m means that the range cannot be set further out than 7.0 m.
It also sets the Maximum Unambiguous Range, MUR, that can be achieved. MUR is the maximum distance at which an object can be located to guarantee that its reflection corresponds to the most recent transmitted pulse. Objects farther away than the MUR may fold into the measured range. For example, with a MUR of 11.5 m, an object at 13.5 m could become visible at 2 m.
| PRF Setting | PRF | MMD | MUR |
|---|---|---|---|
| ACC_CONFIG_PRF_19_5_MHZ* | 19.5 MHz | 3.1 m | 7.7 m |
| ACC_CONFIG_PRF_15_6_MHZ | 15.6 MHz | 5.1 m | 9.6 m |
| ACC_CONFIG_PRF_13_0_MHZ | 13.0 MHz | 7.0 m | 11.5 m |
| ACC_CONFIG_PRF_8_7_MHZ | 8.7 MHz | 12.7 m | 17.3 m |
| ACC_CONFIG_PRF_6_5_MHZ | 6.5 MHz | 18.5 m | 23.1 m |
| ACC_CONFIG_PRF_5_2_MHZ | 5.2 MHz | 24.3 m | 28.8 m |
*19.5MHz is only available for profile 1.