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AWR1843: Noise floor

Part Number: AWR1843

Hi ,

 

1) Noise floor tilts by increasing RxGAIN from 30dB to 48dB

 

Please refer to the attached jpg files

     1_RxGAIN30dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg

     and

     2_RxGAIN48dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg

 

1st one, RxGAIN30dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg, is the result of 2DFFT when

the hand approaches the rader with the configuration “profileConfig HPF 0 0, RxGAIN30dB”

 

2nd one, RxGAIN48dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg, is the result of 2DFFT when

the hand approaches the rader with the configuration “profileConfig HPF 0 0, RxGAIN48dB”

 

If RXGAIN is changed from 30dB to 48dB then the power of noise floor decreased as the distance increases.

The version of SDK is SDKv3.1.

They would like to know the reason why the power of noise floor decreased.

 

2) Noise floor is changed by the type of objects (e.g. the hand or metal ) that approach the radar

 

Please refer to the attached jpg files

     2_RxGAIN30dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg

     and

     3_RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_0_0.jpg

 

2nd one, 3.RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_0_0.jpg, is the result of 2DFFT when

the metal approaches the rader with the configuration “profileConfig HPF 0 0, RxGAIN48dB”

 

Is it possible to confirm on DemoVisualizer if the power is increased or saturated at ADC?

 

3) How to lower the noise floor at long distances when metal is brought closer to the radar

 

Please refer to

    3_RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_0_0.jpg

   and

    4_RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_3_3.jpg

 

The noise floor at long distance doesn’t decrease even if HPF changes from 0 0 to 3 3.

How to decrease it?

 

4) How to change the 2DFFT output of DemoVisualizer to something other than Zero Doppler

I want to display the velocity component on the display of DemoVisuzalizer.

Is it possible to display other than the Zero Doppler?

 

Thanks and Best regards,

HaTa.

<<1_RxGAIN30dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg>>

<<2_RxGAIN30dB_hand_close_toRadar_profileConfig_HPF_0_0.jpg>>

<< 3_RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_0_0.jpg>>

<< 4_RxGAIN48dB_metal_close_toRadar_profileConfig_HPF_3_3.jpg>>