US 12,003,447 B2
Non-linearity estimation for envelope tracking PA
Yaron Laufer, Brookline, MA (US); Gideon Shlomo Kutz, Ramat Hasharon (IL); Amit Bar-Or Tillinger, Tel-Aviv (IL); and Elad Meir, Ramat Gan (IL)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 24, 2022, as Appl. No. 17/648,805.
Prior Publication US 2023/0239092 A1, Jul. 27, 2023
Int. Cl. H04L 5/00 (2006.01); H04L 27/36 (2006.01)
CPC H04L 5/0048 (2013.01) [H04L 5/0067 (2013.01); H04L 5/0073 (2013.01); H04L 27/367 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive, from a base station, one or more signaling messages or pilots;
identify a combined power amplifier (PA) and envelope tracking (ET) non-linearity model associated with the base station based on the one or more signaling messages or pilots; and
compensate for a distortion in one or more subsequent signals from the base station based on the identified combined PA and ET non-linearity model, the distortion being associated with a PA circuitry and an ET circuitry, the PA circuitry and the ET circuitry being associated with the base station, and wherein at least one of:
the one or more signaling messages or pilots include an indication of an ET non-linearity model, and wherein the ET non-linearity model corresponds to a filter response model associated with the ET circuitry associated with the base station;
the one or more signaling messages or pilots are associated with a plurality of power levels, and the at least one processor is further configured to estimate a threshold envelope value associated with the ET circuitry being enabled or disabled based on the one or more signaling messages or pilots;
at least some of the one or more signaling messages or pilots are associated with one or more bandwidths that are less than a threshold; or
to compensate for the distortion, the at least one processor is further configured to perform a digital post-distortion (DPoD) process associated with the one or more subsequent signals from the base station based on the identified combined PA and ET non-linearity model.