AoA test, how to calculate the phase diffence of the 2.4G wave?

RE: AoA test, how to calculate the phase diffence of the 2.4G wave?

upupsky — Fri, 15 Apr 2022 13:23:51 GMT

thanks. I get the algorithm yet, nice ^_^

RE: AoA test, how to calculate the phase diffence of the 2.4G wave?

upupsky — Wed, 09 Mar 2022 14:36:39 GMT

thank you all.

RE: AoA test, how to calculate the phase diffence of the 2.4G wave?

Simonr — Wed, 09 Mar 2022 07:23:05 GMT

I'm sorry, but you're on your own in terms of developing your AoA algorithm, as this won't be delivered by Nordic. The correct formula to calculate the phase angle should be ϕ = tan⁻¹(Q/I)

Best regards,

Simon

RE: AoA test, how to calculate the phase diffence of the 2.4G wave?

upupsky — Mon, 07 Mar 2022 14:29:48 GMT

thank you very much. I read the case for several time, but I am still confuse. this is my matlab code about how to calculate phase diff.

Sn_sample9_37 = (0:36)'*4; %the sample/switch slot data
phi9_45 = phi_fm(9:45) - 2*pi*(fm_250_est - f0_250k) * Sn_sample9_37 * Ts; %use estimate frenquency calculate phase
phi9_45_phase_diff = mod(phi9_45(1:32), 2*pi);

RE: AoA test, how to calculate the phase diffence of the 2.4G wave?

Simonr — Mon, 07 Mar 2022 13:40:24 GMT

This case has already had a discussion on the AoA mathematics. Please give it a read. Both SwRa and PaKa are Nordic Semiconductor employees FYI.

Best regards,

Simon