Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

yalcinPak — Thu, 28 Jul 2022 19:52:30 GMT

As I know you can't calculate with only that board. There is solution. For example you can put 55mm distance between every antennas. I had similar board like yours. I designed external pcb to seperate the antennas.

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

ian_student — Thu, 28 Jul 2022 08:49:23 GMT

Does it mean that I can't calculate through this board...

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

yalcinPak — Mon, 25 Jul 2022 14:48:10 GMT

Antenna positions looks asymetric and two antenna looks too close each other. Angle calculation might be hard with this switching board.

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

Simonr — Wed, 20 Jul 2022 09:13:39 GMT

I'm sorry, but we don't have any input on how you set up/create your AoA algorithm, and I would suggest looking up different pages on the internet to see how it's done.

Best regards,

Simon

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

ian_student — Tue, 19 Jul 2022 11:07:54 GMT

Hello
In fact I also refer to this page
But what I don't understand is what formula needs to be used to achieve the purpose

RE: Does the raw IQ value need to go through any processing? The calculated result is not correct with the actual angle

Simonr — Mon, 18 Jul 2022 12:53:06 GMT

First off, I'm not familiar with these antenna boards you are using, so I can't guarantee that they're working correctly. Anyways, the raw IQ data is not usable by itself, and needs to be converted into vector form to be reviewed properly. This is not an algorithm Nordic will provide I'm afraid, but you can check out this page for information on the various formulas used to translate IQ data between polar and rectangular form.

Best regards,

Simon