Hi AD experts,
I have some troubles for having an effective gain with DPD with the waveform LTE provided.
I use the evb ADRV9002 with a driver and the PA sky66391-12. According to the datasheet, the PA is able to achieve 35dB raw ACLR at 28dBm and 50dB ACLR with DPD.
I measured a raw aclr at 37dB for a 28dBm output
I notice any improvment with the ACLR at 28dBm but I have some improvment at 25dBm as the raw ACLR goes from 38dB to 46dB with DPD.
The hardware set up :
the ORX is set on the RX1B with 60dB attenuation from the output PA
ADVR9002 TX1 is activated
TES set up :
waveform = CFR_sample_rate_15p36M_bw_10M.csv
Device : FDD/LTE/15.36MSPS
Board : external PA loopback after PA = ON
Path Delay = 36500 ( I measured with the API the delay : 18500 ; the DPD was unstable and with 36500 it is better, but there are still some fluctuations)
DPD configured by default)
Could you help us?
[edited by: nicolas_22 at 4:27 PM (GMT -5) on 17 Feb 2021]