Granted Patent B2

US 12,470,448 · App. 17/738,983 · Granted Nov 11, 2025

Inventors: Gideon Shlomo Kutz (Ramat Hasharon, IL); Yaron Laufer (Brookline, MA); Amit Bar-Or Tillinger (Tel-Aviv, IL); Elad Meir (Ramat Gan, IL); Ori Barak (Beer Sheva, IL); Assaf Touboul (Netanya, IL)

Assignee: QUALCOMM Incorporated

H04L27/2623H03F1/3276H03F3/24H04B1/0475H04W74/04H04W76/15H04B2001/0425

Abstract

Claims (99)

1 . A first wireless communication device, comprising:

one or more memories that store processor-executable code; and

one or more processors configured to execute the processor-executable code and cause the first wireless communication device to:

receive, from a second wireless communication device, a capability message comprising a digital pre-distortion capability bit indicating that the second wireless communication device has a capability to compute digital pre-distortion information;

transmit a first message to the second wireless communication device in response to the capability message, wherein the first message requests the second wireless communication device to compute the digital pre-distortion information and transmit the digital pre-distortion information to the first wireless communication device; and

transmit a second message to the second wireless communication device in response to the capability message, wherein the second message comprises:

at least one clipping level associated with a crest factor reducer of a power amplifier circuit of the first wireless communication device,

a first kernel and first parameters associated with a digital pre-distorter of the power amplifier circuit, and

a second kernel and second parameters associated with a power amplifier of the power amplifier circuit.

2 . The first wireless communication device of claim 1 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

transmit, to the second wireless communication device, at least one digital pre-distortion parameter comprising at least one of a digital pre-distortion adjacent channel leakage ratio (ACLR) constraint for a computation of the digital pre-distortion information by the second wireless communication device or at least one digital pre-distortion frequency band weight constraint for the computation of the digital pre-distortion information by the second wireless communication device;

transmit an indication of a change in a non-linearity model for the power amplifier circuit of the first wireless communication device to the second wireless communication device, the power amplifier circuit including the digital pre-distorter;

receive the digital pre-distortion information from the second wireless communication device after the transmission of the indication;

adjust at least one parameter of the digital pre-distorter of the power amplifier circuit based on the digital pre-distortion information; and

transmit a signal to the second wireless communication device via the power amplifier circuit after the adjustment of the at least one parameter of the digital pre-distorter.

3 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to determine the change in the non-linearity model by being further configured to:

change a configuration of the digital pre-distorter.

4 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to determine the change in the non-linearity model by being further configured to:

change a configuration of the crest factor reducer of the power amplifier circuit.

5 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to determine the change in the non-linearity model by being further configured to determine at least one of:

a change in an in-band distortion parameter, a change in an out-of-band emission parameter, a change in a maximum power reduction parameter, a change in a modulation to be used when transmitting the signal via the power amplifier circuit, or a combination thereof.

6 . The first wireless communication device of claim 2 , wherein the indication comprises at least one non-linearity parameter of the non-linearity model.

7 . The first wireless communication device of claim 6 , wherein the at least one non-linearity parameter comprises at least one of: a non-linearity kernel of the digital pre-distorter, the non-linearity model, or a combination thereof.

8 . The first wireless communication device of claim 6 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to transmit the at least one non-linearity parameter after receipt of a request for the at least one non-linearity parameter from the second wireless communication device.

9 . The first wireless communication device of claim 1 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive the digital pre-distortion information from the second wireless communication device, the digital pre-distortion information comprising at least a portion of a set of digital pre-distortion parameters for the digital pre-distorter; and

adjust a parameter of the digital pre-distorter based on the digital pre-distortion information.

10 . The first wireless communication device of claim 1 , wherein the first message further requests the second wireless communication device to compute digital post-distortion information in conjunction with the digital pre-distortion information.

11 . The first wireless communication device of claim 9 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

transmit first information for computing the digital pre-distortion information to the second wireless communication device.

12 . The first wireless communication device of claim 11 , wherein:

the first information comprises at least one of a kernel type, a digital pre-distortion parameter, or a combination thereof; and

the digital pre-distortion information comprises digital pre-distortion kernel coefficients.

13 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive digital pre-distortion coefficients for the digital pre-distorter from the second wireless communication device;

pre-distort the signal based on the digital pre-distortion coefficients to provide a pre-distorted signal;

amplify the pre-distorted signal at the power amplifier of the power amplifier circuit to provide an amplified signal; and

transmit the amplified signal to the second wireless communication device.

14 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

calculate digital pre-distortion coefficients for the digital pre-distorter;

pre-distort the signal based on the digital pre-distortion coefficients to provide a pre-distorted signal;

amplify the pre-distorted signal at the power amplifier of the power amplifier circuit to provide an amplified signal; and

transmit the amplified signal to the second wireless communication device.

15 . A method for wireless communication at a first wireless communication device, the method comprising:

receiving, from a second wireless communication device, a capability message comprising a digital pre-distortion capability bit indicating that the second wireless communication device has a capability to compute digital pre-distortion information;

transmitting a first message to the second wireless communication device in response to the capability message, wherein the first message requests the second wireless communication device to compute the digital pre-distortion information and transmit the digital pre-distortion information to the first wireless communication device; and

transmitting a second message to the second wireless communication device in response to the capability message, wherein the second message comprises:

at least one clipping level associated with a crest factor reducer of a power amplifier circuit of the first wireless communication device,

a first kernel and first parameters associated with a digital pre-distorter of the power amplifier circuit, and

a second kernel and second parameters associated with a power amplifier of the power amplifier circuit.

16 . A first wireless communication device, comprising:

one or more memories that store processor-executable code; and

one or more processors configured to execute the processor-executable code and cause the first wireless communication device to:

transmit, to a second wireless communication device, a capability message comprising a digital pre-distortion capability bit indicating that the first wireless communication device has a capability to compute digital pre-distortion information;

receive a first message from the second wireless communication device after the capability message is transmitted, wherein the first message requests the first wireless communication device to compute the digital pre-distortion information and transmit the digital pre-distortion information to the second wireless communication device; and

receive a second message from the second wireless communication device in response to the capability message, wherein the second message comprises:

at least one clipping level associated with a crest factor reducer of a power amplifier circuit of the second wireless communication device,

a first kernel and first parameters associated with a digital pre-distorter of the power amplifier circuit, and

a second kernel and second parameters associated with a power amplifier of the power amplifier circuit.

17 . The first wireless communication device of claim 16 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive, from the second wireless communication device, at least one digital pre-distortion parameter comprising at least one of a digital pre-distortion adjacent channel leakage ratio (ACLR) constraint for a computation of the digital pre-distortion information for the second wireless communication device or at least one digital pre-distortion frequency band weight constraint for the computation of the digital pre-distortion information for the second wireless communication device;

receive, from the second wireless communication device, an indication of a change in a non-linearity model for the power amplifier circuit of the second wireless communication device;

update non-linearity information for a digital post-distorter of the first wireless communication device after the receipt of the indication;

compute the digital pre-distortion information for the digital pre-distorter of the power amplifier circuit of the second wireless communication device according to the digital pre-distortion ACLR constraint or the at least one digital pre-distortion frequency band weight constraint after the receipt of the indication;

transmit the digital pre-distortion information to the second wireless communication device;

receive a signal from the second wireless communication device; and

use the digital post-distorter to compensate for non-linear distortion in the signal.

18 . The first wireless communication device of claim 17 , wherein the indication of the change in the non-linearity model indicates at least one of: a change in an in-band distortion parameter, a change in an out-of-band emission parameter, a change in a maximum power reduction parameter, a change in a modulation to be used when transmitting the signal via the power amplifier circuit, or a combination thereof.

19 . The first wireless communication device of claim 17 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

determine the non-linearity model.

20 . The first wireless communication device of claim 19 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

select a set of kernels for the non-linearity model after the receipt of the indication of the change in the non-linearity model; and

calculate coefficients for the non-linearity model based on the set of kernels.

21 . The first wireless communication device of claim 20 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

select the set of kernels based on at least one received signal.

22 . The first wireless communication device of claim 19 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive at least one non-linearity parameter of the non-linearity model from the second wireless communication device; and

generate an estimate of the non-linearity model based on the at least one non-linearity parameter.

23 . The first wireless communication device of claim 22 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

transmit a request for the at least one non-linearity parameter; and

receive the at least one non-linearity parameter after the transmission of the request.

24 . The first wireless communication device of claim 17 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive the non-linearity model from the second wireless communication device.

25 . The first wireless communication device of claim 16 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to:

receive, from the second wireless communication device, first information for computing the digital pre-distortion information; and

calculate the digital pre-distortion information according to the first information.

26 . A method for wireless communication at a first wireless communication device, the method comprising:

transmitting, to a second wireless communication device, a capability message comprising a digital pre-distortion capability bit indicating that the first wireless communication device has a capability to compute digital pre-distortion information;

receiving a first message from the second wireless communication device after the capability message is transmitted, wherein the first message requests the first wireless communication device to compute the digital pre-distortion information and transmit the digital pre-distortion information to the second wireless communication device; and

receiving a second message from the second wireless communication device in response to the capability message, wherein the second message comprises:

at least one clipping level associated with a crest factor reducer of a power amplifier circuit of the second wireless communication device,

a first kernel and first parameters associated with a digital pre-distorter of the power amplifier circuit, and

a second kernel and second parameters associated with a power amplifier of the power amplifier circuit.

27 . The first wireless communication device of claim 1 , wherein the at least one digital pre-distortion frequency band weight constraint comprises:

a first weight for a first frequency band associated with in-band frequencies; and

a second weight for a second frequency band associated with out-of-band frequencies, wherein the second weight is different from the first weight.

28 . The first wireless communication device of claim 2 , wherein the one or more processors are further configured to execute the processor-executable code and cause the first wireless communication device to determine the change in the non-linearity model by being further configured to:

detect a change associated with the power amplifier of the power amplifier circuit.

29 . The first wireless communication device of claim 17 , wherein the indication of the change in the non-linearity model indicates at least one of: a change associated with the power amplifier of the power amplifier circuit, a change in a configuration of the digital pre-distorter of the power amplifier circuit, a change in a configuration of the crest factor reducer of the power amplifier circuit, or a combination thereof.

Assignments (1)

Continuity (2)

References Cited (32)