AWR1642: AWR1642：the compution of angle

Rata Zhang

Part Number: AWR1642

Hi,

In the DSS demo,before Azimuth FFT，2D FFT is processed. According to the theory of angle estimation,I think only 1D FFT is needed,I want to ask why 2D FFT is used in the algrothm.

Thanks in advances,

Regards,

Rata.

over 6 years ago

0 Anil Mani over 6 years ago

TI__Expert 4720 points

Hi Rata,

The reason we do a 2D DFT operation before the azimuth FFT is because performing a '2D DFT' improves the SNR of the input samples to the azimuth FFT. Note that only the 1D FFT output is saved in L3 (as the radar cube). The 2D FFT output needs to be recomputed when performing the azimuth FFT.

Regards

Anil

0 Rata Zhang over 6 years ago in reply to Anil Mani

Expert 2405 points

Hi Anil,

That is to say,it is reasonable that angle FFT is performed after 1D FFT without regard to the SNR of the input samples.Is that right?I have another question,why can 2D DFT operation before the azimuth FFT improve the SNR of the input samples?

Regards

Rata

0 Cesar over 6 years ago in reply to Rata Zhang

TI__Guru*** 138349 points

Hi,

Can you please start a new thread for the new questions?

Thank you

Cesar

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AWR1642: AWR1642：the compution of angle