AWR1443: Removing DC Creating FFT plot

Yunish Shrestha

Part Number: AWR1443

Hi,

I was able to read the raw data that was created by Radar Studio when AWR 1443 was used with TSW 1400. Now I need to get the range profile of the data.I have following confusions:

1) When I compare my time domain plot with the plot created by Radar Studio with the plot I created, there seem to be some dissimilarities in the plots. As Radar Studio removes the DC, I want to know how can I remove DC in my own plot.

2) To create FFT output in dBFS, what should I do? Will abs value of (FFT of (Idata+j*Qdata))/ 2^15 ) produce the results as produced by Radar Studio? What should I do to convert the bin frequency to range in meters?

Thank You

over 7 years ago

0 Raghunandan Kamath over 7 years ago

TI__Mastermind 22155 points

Hello Yunish,

Have you gone through our MMWAVE-TRAINING-SERIES .

Some of your queries are explained in these training series.

-Raghu

0 Anil Mani over 7 years ago

TI__Expert 4720 points

Yunish,

1) To remove DC, what we do in the radar Studio GUI is to compute the mean signal level per active channels. This mean signal level is usually a complex number. Then we remove the mean signal level from each active channel.

2) To translate the FFT output to dBFs, perform the fft, compute 20 * log10(abs(fft)), and then follow the instructions given below.

Regards

Anil

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AWR1443: Removing DC Creating FFT plot