This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

IWR6843: 在使用level_sensing液位测量的例程时,芯片的精度能达到0.1mm吗?

Part Number: IWR6843

你好!

在high_accuracy_16xx_lab_user_guide资料中查询到:
Error vs time domain SNR scatter plot
Can read of the max error for a given time domain SNR.
Processing gain to convert to Detection SNR is approximately 37 dB (10log10(512*10))
Conclusions
We read the following results from the plot:
21
Target Accuracy
Required Detection SNR
< 0.1 mm ~ 57 dB
<0.5 mm ~ 42 dB
< 1 mm ~ 36 dB
想咨询的是:
现在mmwave_industrial_toolbox_4_7_0\labs\level_sensing\68xx_high_accuracy\chirp_configs里面的high_accuracy_demo_68xx.cfg里面的参数为:
profileCfg 0 60 7 7 114.4 0 0 33.71 1 512 5000 0 0 48
chirpCfg 0 0 0 0 0 0 0 1
frameCfg 0 0 10 0 500 1 0
其中512,10计算出10*log10(512*10)=37dB,这个表示默认参数支持1mm精度。
但是想更高的精度,最多512修改为2048,10修改为128,计算出10*log10(2048*128)=54dB?达不到57dB?