AOA received iq data is so poor

with the samples code:
direction_finding_connectionless_tx
direction_finding_connectionless_rx


CTE[0]: samples type: 8 bits int, samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -450 IQ[0]: -12, 1 IQ[1]: -1, 0 IQ[2]: 0, 0 IQ[3]: -1, 0 IQ[4]: -1, -1 IQ[5]: -1, 0 IQ[6]: 0, 0 IQ[7]: 0, -1 IQ[8]: -1, -1 IQ[9]: -1, 0 IQ[10]: -1, 0 IQ[11]: 0, 0 IQ[12]: 0, 0 IQ[13]: 0, 0 IQ[14]: 0, 0 IQ[15]: -1, -1 IQ[16]: 0, 0 IQ[17]: -1, -1 IQ[18]: 0, -1 IQ[19]: 0, 0 IQ[20]: -1, 0 IQ[21]: 0, 0 IQ[22]: 0, -1 IQ[23]: -1, -1 IQ[24]: 0, 0 IQ[25]: -1, -1 IQ[26]: 0, 0 IQ[27]: 0, 0 IQ[28]: 0, -1 IQ[29]: 0, 0 IQ[30]: 0, 0 IQ[31]: -1, 0 IQ[32]: 0, 0 IQ[33]: 0, -1 IQ[34]: 0, 0 IQ[35]: 0, 0 IQ[36]: -1, 0 IQ[37]: 0, 0 IQ[38]: 0, 0 IQ[39]: 0, -1 IQ[40]: 0, -1 IQ[41]: 0, -1 IQ[42]: 0, 0 IQ[43]: -1, -1 IQ[44]: 0, -1 CTE[0]: samples type: 8 bits int, samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -460 IQ[0]: 13, 7 IQ[1]: 10, 1 IQ[2]: -10, -2 IQ[3]: 8, -2 IQ[4]: 10, 0 IQ[5]: -10, -1 IQ[6]: 7, -2 IQ[7]: 8, -3 IQ[8]: -8, 3 IQ[9]: 9, -3 IQ[10]: 6, -5 IQ[11]: 8, -6 IQ[12]: -6, 6 IQ[13]: -7, 7 IQ[14]: -4, 7 IQ[15]: 5, -9 IQ[16]: 4, -10 IQ[17]: 2, -10 IQ[18]: 0, -9 IQ[19]: 1, 8 IQ[20]: -3, -8 IQ[21]: -2, -10 IQ[22]: 1, 9 IQ[23]: 3, 8 IQ[24]: -6, -9 IQ[25]: 6, 7 IQ[26]: -8, -5 IQ[27]: 7, 3 IQ[28]: -9, -6 IQ[29]: -8, -2 IQ[30]: -9, -1 IQ[31]: -8, 0 IQ[32]: 9, 0 IQ[33]: -8, 2 IQ[34]: 7, -4 IQ[35]: -10, 2 IQ[36]: 6, -5 IQ[37]: -9, 5 IQ[38]: 6, -7 IQ[39]: 6, -8 IQ[40]: -7, 7 IQ[41]: -4, 8 IQ[42]: -2, 8 IQ[43]: 2, -10 IQ[44]: 1, -11

the samples iq is so poor.
about 90% values is 0, 1.
10% values looks bigger (below 10)

would you please post some good iq ?
I want to know what is the normal iq.

thanks.

Parents
  • Hello,

    I agree that these measurements look a bit poor. 

    Perhaps you can share some more details on your project:

    1: What NCS version are you using?

    2: What HW are you using? 

    3: I assume that these samples are what you received on your device. Is this also the device with the antenna array? Or is it from a receiver with a single antenna receiving packets from a device sending packets from an antenna array?

    4: What sort of antenna array are you using?

    5: Are both devices nRF Devices?

    Best regards,

    Edvin

Reply
  • Hello,

    I agree that these measurements look a bit poor. 

    Perhaps you can share some more details on your project:

    1: What NCS version are you using?

    2: What HW are you using? 

    3: I assume that these samples are what you received on your device. Is this also the device with the antenna array? Or is it from a receiver with a single antenna receiving packets from a device sending packets from an antenna array?

    4: What sort of antenna array are you using?

    5: Are both devices nRF Devices?

    Best regards,

    Edvin

Children
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