Digital Post Distortion with Antenna Selection

Solution Overview

Problem

Existing digital post distortion (DPOD) techniques in wireless communications face increased complexity, overhead, power consumption, and latency as the number of transmit antennas grows, particularly in massive MIMO systems.

Innovation Solution

The implementation of DPOD with antenna selection, where the receiving device signals its capability for performing DPOD based on antenna selection, and the transmitter signals the selected transmit antennas, allowing the receiver to perform DPOD processing only on the selected subset of antennas, thereby reducing complexity and latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of transmit antennas is increased to support massive MIMO systems, then the data carrying capacity and spectral efficiency are improved, but the complexity, overhead, power consumption, and latency of digital post distortion processing increase

Engineering Contradiction:

Improvedata carrying capacityVSAvoidDPOD processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts and processes only the necessary subset of antenna signals for DPOD correction rather than processing all transmit antenna signals. By identifying and selecting specific antenna indices that require distortion correction, the system reduces the processing burden while maintaining correction effectiveness for the most critical signals.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the DPOD processing task by dividing the full set of transmit antennas into distinct groups or subsets. Each subset is processed independently with its own distortion correction parameters, allowing the system to manage complexity through modular processing rather than treating all antennas as a single processing block.

Inventive Principle:

Principle #1Segmentation

2Productivity

If the number of transmit antennas is increased to support massive MIMO systems, then the data carrying capacity and spectral efficiency are improved, but the power consumption of DPOD processing increases

Engineering Contradiction:

Improvespectral efficiencyVSAvoidDPOD power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent extracts and processes only the necessary subset of antenna signals for DPOD correction rather than processing all transmit antenna signals. By identifying and selecting specific antenna indices that require distortion correction, the system reduces the processing burden while maintaining correction effectiveness for the most critical signals.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies partial action by performing DPOD processing on only a portion of the transmit antenna signals rather than all signals. This selective processing approach applies correction where most needed while accepting that some antennas may not receive full correction, thereby reducing overall power consumption.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If the number of transmit antennas is increased to support massive MIMO systems, then the data carrying capacity and spectral efficiency are improved, but the latency of DPOD processing increases

Engineering Contradiction:

Improvedata carrying capacityVSAvoidDPOD processing latency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent extracts and processes only the necessary subset of antenna signals for DPOD correction rather than processing all transmit antenna signals. By identifying and selecting specific antenna indices that require distortion correction, the system reduces the processing burden while maintaining correction effectiveness for the most critical signals.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the DPOD processing task by dividing the full set of transmit antennas into distinct groups or subsets. Each subset is processed independently with its own distortion correction parameters, allowing the system to manage complexity through modular processing rather than treating all antennas as a single processing block.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250183956A1Digital post distortion with transmit antenna selection

Publication Date: 2025.06.05 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for digital post distortion (DPD) with antenna selection. A method for wireless communication by a user equipment (UE) includes receiving signaling from a network entity indicating one or more selected transmit antennas. The method includes receiving a data transmission from the network entity and performing DPOD processing of the data transmission based on the one or more selected transmit antennas.