How know RSSI?

Hi 

I need to know the RSSI but I donĀ“t know how do that, I have a nRF9160DK kit with onboard gps antenna and I have proved the gps sample but it don't show information about power of signal.

I have another doubt, what is the period of time where I can do a question without be a necromancer?

Thanks

Julio

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  • Hi,

     

    I need to know the RSSI

     LTE:

    There are no way to get the RSSI directly when using the nRF9160. However, you can use the +CESQ AT command to get the RSRP and RSRQ.

    You can then calculate the RSSI like this:

    RSSI = 10log(N) + RSRP - RSRQ.

    N is Resource Blocks and is 6 for LTE M1. 

    GPS:

    Again, it is not possible to get the RSSI directly. Instead, you get the CN0, which is the carrier-to-noise-density ratio (or the ratio of the signal level to the (noise level in 1Hz BW)).

    If you know the Noise Figure of the receiver, the RSSI = -174dBm + NF + CN0.

     

    I have another doubt, what is the period of time where I can do a question without be a necromancer?

     I assume you are talking about the Necromancer achievement?

    In that case, it is 30 days:

    Best regards,

    Didrik

Reply
  • Hi,

     

    I need to know the RSSI

     LTE:

    There are no way to get the RSSI directly when using the nRF9160. However, you can use the +CESQ AT command to get the RSRP and RSRQ.

    You can then calculate the RSSI like this:

    RSSI = 10log(N) + RSRP - RSRQ.

    N is Resource Blocks and is 6 for LTE M1. 

    GPS:

    Again, it is not possible to get the RSSI directly. Instead, you get the CN0, which is the carrier-to-noise-density ratio (or the ratio of the signal level to the (noise level in 1Hz BW)).

    If you know the Noise Figure of the receiver, the RSSI = -174dBm + NF + CN0.

     

    I have another doubt, what is the period of time where I can do a question without be a necromancer?

     I assume you are talking about the Necromancer achievement?

    In that case, it is 30 days:

    Best regards,

    Didrik

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