[srslte-users] USRP Antenna TX-Rx Power

[Cristian Balint]

Hi John,


>
> Hi Cristian,
> it design for PAR 10db. so you can set back the output power to support
> 15db PAPR, for example use 5W output power with the 10W amplifier. actually
> the PAPR of OAI is not as high as 15db when it have full traffic.\
>

* Case of PAR=10dB for 5W (37dBm) target means that you need 50W (47dBm)
capability of power (even at 0.01% CDF, still needed).
* Commercial grade RF solutions usually do not exceed 9dB PAR, i.e. NXP's
LDMOS series touted for 5W (36dBm) can handle max 20W (42dBm @P1dB) even
for a continuous amount of time.


> what do you mean the rf path?
>
>
* Documentation table advertise absolute max power being at P1dB ?
* Is that a combined rf path with separate handling of peaks (for high PAR)
?
* If a combined rf path does it correct / compensate for phase
inequalities at the combiner stage (have a predistorsioner) ?
* Are bias currents controlled actively for drift compensation ?
* How does it handle and tolerate impedance / antenna mismatches ?

A simple diagram can reflect the capability and basic elements
composing the path of the amplifier.

LTE is so different from the CW (continuous wave) world, it must be handled
accordingly.
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