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DCA1000EVM: with AWR1642- angle of arrival estimation

Part Number: DCA1000EVM

Hi,

 I am trying to do AoA estimation with the raw data from the DCA1000EVM, using the fft method, but I am getting strange results. There seems to be a constant peak in the  middle of the range irrespective of what is in front of it. It would be great if someone could tell me where I'm going wrong or point me in the direction of some literature or example code.

Thank you,

Charlie Ralli