[srslte-users] About Open Loop control, which are the parameters to adjust in order to compensate for added gain?

[Andrea Valori]

Dear All,



We are trying to understand the uplink power control. Adding an external
amplifier after the SDR (tx) lead to the UE transmitting at much lower
power. I believe this is expected since the UE will underestimate the real
pathloss (due to the amplification).

Of course this are effects that must be compensated with some settings. I
believe the key configurations are in the sib.conf file:

p0_nominal_pusch = -85;

alpha = 0.7;

p0_nominal_pucch = -107;

and possibly other parameters… for example we could not find the “reference
signal transmit power”, which we would expect to see somewhere… is it the
“rs_power=0”, which is by default equal to zero? Which units?

Unfortunately I can’t find any documentation… is someone able to help in
understanding this?



Thanks and regards
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