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CC2652R: AOA dump IQ data.

Weli
Expert 1155 points
Part Number: CC2652R


Dear Expert,

i'am using CC2652LP to CC2652LP via ipex connector.

and i dump IQ data as below.

but i can't get pure sin wave.

the csv data as attached file.

11_04_2021_21_04_01_rtls_raw_iq_samples_f88a5e2d9d68_0_loop1.csv

could you give me some hints for the above IQ data?

  • 0
    TI__Mastermind 25810 points

    Hey Weli,

    I've assigned your post to an expert in this area to comment on. In the meantime, which SDK are you using, and what example projects?

    Weli said:
    i'am using CC2652LP to CC2652LP via ipex connector.

    I see. Since you are using the ipex connector, did you move the on board capacitor C14 to the C24 position? See this related post.

  • 0 in reply to Ammar N
    Expert 1155 points

    HI Ammar,

    I have moved the capacitor to the ipex side.

    please see the below picture.

    thx for your reply.

  • +1 in reply to Weli
    TI__Guru** 101490 points

    Hi,

    Actually, the results look good to me.

    We see the proper sinusoidal signal while on a fix channel. When switching channel (after 8 + 37 samples), there is an expected discontinuity.

    Last but not least, the signal is only distorted while on receiving the 8 samples of the reference period. In other words, these won't affect the angle calculation. (As a reminder, samples collected during the reference period should be discarded).

    I hope this will help,

    Best regards,