https://devzone.nordicsemi.com/f/nordic-q-a/95572/cte-data-caculate-arrival-angleHi, I am using nrf52833 for AOA, the examples are direction_finding_connectionless_tx and direction_finding_connectionless_rx. Now I use two antenna array for locater and I can get cte data. For further caculating I print I and Q data in cte_recv_cben-USTelligent Community 13Wed, 11 Jan 2023 14:05:29 GMThttps://devzone.nordicsemi.com/thread/404352?ContentTypeID=1Wed, 11 Jan 2023 14:05:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ecaa4fdf-5c2d-492b-9204-25c8f30d5bd6Amanda Hsieh<p>Hi,&nbsp;</p> <p><span>The raw IQ data that is transmitted must be converted into vector form to be reviewed properly. We don&#39;t have any specific sample code showing this, but you can check out&nbsp;</span><a title="https://www.pe0sat.vgnet.nl/sdr/iq-data-explained/" href="https://www.pe0sat.vgnet.nl/sdr/iq-data-explained/" rel="noopener noreferrer" target="_blank">this page</a><span>&nbsp;for information on the various formulas used to translate IQ data between polar and rectangular forms. Nordic will not provide a Direction Finding algorithm for you I&#39;m afraid.&nbsp;</span></p> <p><span>It could be a problem with your Antenna array also for all I know, as you don&#39;t say what kind of antenna array you&#39;re using. Does &quot;two antenna array&quot; mean that you only have 2 antennas in your array for example? If so that is too few antennas. They will need a minimum of 4 antennas (2x2 array) to get usable IQ data.&nbsp;</span></p> <p><span>Regards,<br />Amanda H.</span></p><div style="clear:both;"></div>