https://devzone.nordicsemi.com/f/nordic-q-a/100460/angle-calculation-using-phase-differenceHi, I am working on the angle of arrival calculation for direction finding. I am trying to calculate the AOA using below formula: theta = arcsin (phase_difference * wavelength) / (2 * pi * d) with reference to https://github.com/MSBeni/AoA_IQsamplesen-USTelligent Community 13Mon, 05 Jun 2023 10:01:07 GMThttps://devzone.nordicsemi.com/thread/429230?ContentTypeID=1Mon, 05 Jun 2023 10:01:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0556478e-94b1-4d9c-a187-d14a3ff51038Elfving<p>Hello,</p> <p>Note the difference between fig1 in the paper and the illustration from the BLE spec. I think they just define θ a bit differently in the paper you&#39;ve linked to, and changed the math to compensate.</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1685955815533v1.png" alt=" " /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1685955857019v2.png" alt=" " /></p> <p>Btw, I would recommend you to <a href="https://infocenter.nordicsemi.com/pdf/nwp_036.pdf">check out our whitepaper on direction finding</a> if you haven&#39;t already.</p> <p>Regards,</p> <p>Elfving</p><div style="clear:both;"></div>