I made a prototype board with module and antenna, but I want to add a Low-Noise-Amplifier in my next design. For that I need to choose how much dB gain the LNA should provide. I need to estimate my current SNR or SINR … It should be value ranging from 0dB to 20dB. This is the data I can get from HL7800-M.18.104.22.168 :
+KCELLMEAS: -106.0,124.0,20.1,5.0,1.0 +CSQ: 17,99 +CESQ: 99,99,255,255,8,35 +KCELLMEAS: <RSRP>,<Downlink Path Loss>,<PUSCH Tx Power>,<PUCCH TxPower>,<SiNR> +CSQ: <rssi>,<ber> +CESQ: <rxlev>,<ber>,<rscp>,<ecno>,<rsrq>,<rsrp>
The last value “1.0” on +kcellmeas is SINR but its in dBm… decibel-milliwatts. How can I find SNR in dB? (not milliwatts)
I’m trying to use other numbers like RSSI and RSRQ to calculate how much power I need in LNA chip, but I can’t figure it out. It says look at SNR/SINR first. Is there other advice on selecting what power of LNA I need?