IWR1443BOOST: lab004-high-accuracy-14xx not improve the accuracy over 10 meters

feng tang

Part Number: IWR1443BOOST

Why lab004-high-accuracy-14xx does not improve the accuracy over 10 meters with the configured maximum range of 18.6 meters (using profile_2db) and maximum range of 33 meters (using profile_2de)? the high accuracy visualizer also only show the plot up to 10 meters?

over 7 years ago

0 Michelle Liu over 7 years ago

TI__Genius 11405 points

The accuracy can be achieved is strongly correlated with the SNR. The distance of object, tx power, rx gain, the radar cross-section of the object, shape and angle of incidence all affects SNR value.

As for the high accuracy visualizer, you can update Range Depth value beyond 10m. When running the plot, zoom out button can also be used.

Regards,

Michelle

0 feng tang over 7 years ago in reply to Michelle Liu

Genius 3595 points

The range depth value can not be change.

0 Michelle Liu over 7 years ago in reply to feng tang

TI__Genius 11405 points

Please change the value before sending the configuration file. After it's running, you can't change anymore.

Regards,
Michelle

0 feng tang over 7 years ago in reply to Michelle Liu

Genius 3595 points

Does Zoom FFT in lab004-high-accuracy-14xx do any thing different in the range over 10 meters? The SNR looks very good over 10 meters range, but the measurement error increase. Why?

0 Michelle Liu over 7 years ago in reply to feng tang

TI__Genius 11405 points

The max range of the config is 20m and it looks like these peak points are at that max range . Due to the wrap-around nature of the FFT causing energy to bleed through from the DC bins (close to 0m) that last 10% of the chirp configuration max range should be ignored. Any points beyond 90% x 20m(max range of the config) = 18m should be ignored.

Regards,
Michelle

0 feng tang over 7 years ago in reply to Michelle Liu

Genius 3595 points

The max range of the config profile_2be.txt is 33 meters, not sure why the "high_accuracy_14xx_lab_user_guide" page 13 show "10 meters, Like what I mentioned from the beginning "the measurement error increase over 10 meters for both profile_2bd and profile_2be. The screen shot in the previous email only show you the SNR, at the other measurement point, the plot is similar. how could the energy bleed to DC bin impact the accuracy if the peak's SNR is high enough?

0 feng tang over 7 years ago in reply to feng tang

Genius 3595 points

config files: "profile_2db","profile_2de".

0 Michelle Liu over 7 years ago in reply to feng tang

TI__Genius 11405 points

There are other factors affecting accuracy, especially at longer range. The multipath effect from deflection of the surrounding object could move the peak around and degrade accuracy. Regarding to the algorithm, there's no difference between within 10m and above 10m.

Regards,
Michelle

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IWR1443BOOST: lab004-high-accuracy-14xx not improve the accuracy over 10 meters