IWR1642BOOST: Accuracy and SNR

Akshay Patel1

Part Number: IWR1642BOOST

Hi,

In page 21 of High Accuracy Range Measurement – 16xx user guide, Processing gain is calculated as (10log10(512*10)) ~ 37 dB. I think process gain is FFT gain. FFT gain is given by 10log10(M/2) dB, where M is size of FFT.

1) I want to know what (512*10) represents in (10log10(512*10)). I think it is (FFT size * number of loops). If correct then this does not match with 10log10(M/2).

2) In table showing Target Accuracy and Required Detection SNR relation, what does Required Detection SNR represents. What parameters (ADC SNR, FFT gain, phase noise etc) are included in SNR.

Thanks,

Akshay

over 5 years ago

0 Akash Gondalia over 5 years ago

TI__Guru 50240 points

Hi Akshay,

Both of the queries are discussed in the High Accuracy 16xx Lab User Guide.

Cheers,

Akash

0 Akshay Patel1 over 5 years ago in reply to Akash Gondalia

Intellectual 690 points

Hi,

I have raised query after reading High Accuracy 16xx Lab User Guide. My queries are not answered in user guide. Request you to check query, please let me know if any clarification is required.

Thanks,

Akshay

0 Akshay Patel1 over 5 years ago in reply to Akshay Patel1

Intellectual 690 points

Hi Akash,

Refer below screenshot from High Accuracy 16xx Lab User Guide.

1) I want to know what (512*10) represents in (10log10(512*10)).

2) In table showing Target Accuracy and Required Detection SNR relation, what does Required Detection SNR represents. What parameters (ADC SNR, FFT gain, phase noise etc) are included in SNR. At which stage in processing said SNR is required. Is it required at EVM antena or ADC input or FFT input.

Thanks,

Akshay

0 Akshay Patel1 over 5 years ago in reply to Akshay Patel1

Intellectual 690 points

Any updates..

Regards,

Akshay

0 Akash Gondalia over 5 years ago in reply to Akshay Patel1

TI__Guru 50240 points

Hi Akshay,

You are correct the 512 is FFT size for this lab and 10 corresponds to the number of loops.

Cheers,

Akash

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IWR1642BOOST: Accuracy and SNR