AWR1642: General Questions

Hello Roy,
Please find my reply below:

1. How does the temperature affect the drift measure of the values?
<VD> Are you referring to the RF performance change with temperature drift? You can contact the business team to get access to the internal characterization data across temperature (under NDA).

2. Could you provide more clear information on how the angle of the placement of the device on a car would influence the performance?
<VD> In general any change in the angle of the placement of the device would modulate the computation angle with respect to the car. For example in the radar mounted right in front of the car is tilted by 2deg in the assembly, the angle estimated would be shifted by 2deg. This can be calibrated once after assembly.

3. Can you provide more data on the effect on the accuracy of placing the device behind certain material (Car Emblem or bumper)?
<VD> Any material like a bumper will cause two effects, one is it would attenuate the signal based on the material properties and two it will reflect back some of the signal back to the radar receiver. The first part would cause an SNR degradation. For the second , this reflected signal will have an IF frequency which depends on the distance of the bumper. We have a programmable HPF which the user configures such that this bumper frequency is highly attenuated by this HPF.

4. Could you give some more information on the interaction with other Radar equipped vehicles, will would there be any disturbance, and how are the effects of this being mitigated – can they recognize different frequencies?
<VD> Incase the frequencies of the other radar match your radar AND the chirps of the two radars over lap there could be interference during the overlap period. In this case one level of filtering is done by the IF filter, in case the down converted signal from the other car's radar falls outside the IF frequency configured then it will get attenuated by the IF filter. The overlap of the chirps would typically happen for a short period and you could detect gliches in the time domain waveform and filter it out in the DSP. The next level is since TI's radar has complex IF chain, the signal from the image band can be used to identify interference signal.

5. If the AWR1642 device radar would be disturbed, how long would the regeneration rate be?
<VD> I assume this is continuation of point (4). The radar signal as such does not get disturbed, its just that the receiver will receive additional signal (apart from its own TX) from the other radar device. So as soon as that radar's signal does not over lap with your radar's signal you interference would be stopped.

6. Do you have more details on the layer structure and board material of the EVM?
<VD> The stack up details are available at the following location :www.ti.com/.../sprr261

Regards,
Vivek