AWR1843's method

Hiroyuki Kanematu

Expert 2975 points

Other Parts Discussed in Thread: AWR1843

I have a question regarding what the AWR1843 has detected.

1. How many objects can AWR1843 detect?

2. Do you collect statistics when calculating the distance from the 1-frame data of AWR1843?

over 4 years ago

+1 Cesar over 4 years ago

TI__Guru**** 150224 points

Hi,

1) The number of objects is determined mostly by the environment and configuration (number of ADC samples, number of chirps...) Usually in most applications the challenge is that there are reflections which are considered as noise and are not useful for the final algorithm decision.

2) What type of statistics? The mmWave SDK demo provides statistics about processing times.

thank you

Cesar

+1 Hiroyuki Kanematu over 4 years ago in reply to Cesar

Expert 2975 points

Hi, Cesar

The second question is to calculate the IF frequency from each chirp in one frame. I wanted to ask if it is possible to obtain the distance by collecting statistics on which part of the calculated frequency was the most frequent.

+1 Cesar over 4 years ago in reply to Hiroyuki Kanematu

TI__Guru**** 150224 points

No, we don't collect this type of statistics

thank you

Cesar

0 Hiroyuki Kanematu over 4 years ago in reply to Cesar

Expert 2975 points

Hello Cesar

thank you for answering

If so, how do you calculate the distance from one frame?

I would like you to tell me.

+1 Cesar over 4 years ago in reply to Hiroyuki Kanematu

TI__Guru**** 150224 points

The distance is computed based on the range fft computation

Thank you

Cesar

0 Hiroyuki Kanematu over 4 years ago in reply to Cesar

Expert 2975 points

Hello

The Range-FFT is performed for one chirp wave. Is the chirp for detecting the distance randomly selected from one chirp frame?

0 Hiroyuki Kanematu over 4 years ago in reply to Cesar

Expert 2975 points

As an example, when you send a frame in Studio, the distance is given. Which chirp does the distance data come from?

+1 Cesar over 4 years ago in reply to Hiroyuki Kanematu

TI__Guru**** 150224 points

It is from the average of all the chirps. The range fft is computed for each chirp, than it is averaged to improve the SNR

thank you

Cesar

0 Hiroyuki Kanematu over 4 years ago in reply to Cesar

Expert 2975 points

Hello Cesar

Thank you for answering the question.

Does that mean that the distance is averaged from the calculation results from each chirp in one frame?

0 Cesar over 4 years ago in reply to Hiroyuki Kanematu

TI__Guru**** 150224 points

yes

Thank you

Cesar

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AWR1843's method