Sidelink Peak Suppression Using PSIM for Lower PAPR

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Solution Overview

Problem

Sidelink user equipment (UE) transmissions in wireless communications systems experience high peak-to-average power ratios (PAPRs), leading to decreased efficiency and increased power consumption of power amplifiers, which can result in performance drawbacks.

Innovation Solution

Implement peak suppression techniques by clipping signal peaks and transmitting peak suppression information messages (PSIM) to other UEs, allowing for efficient power consumption and network performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If peak suppression is applied to sidelink transmissions, then PAPR is reduced and power amplifier efficiency is improved, but signal processing complexity and latency increase due to peak detection and PSIM transmission

Engineering Contradiction:

Improvepower amplifier efficiencyVSAvoidprocessing latency

Core Design Contradiction:

Loss of energyVSLoss of time

Solution Approach 1:

The system performs peak suppression processing in advance before transmission, and the receiving UE stores and utilizes PSIM information for future signal reconstruction, reducing real-time processing requirements and latency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

PSIM messages act as intermediary information that carries peak suppression data between transmitting and receiving UEs, enabling efficient signal reconstruction without requiring complex real-time processing at the receiver

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If peak suppression is applied to sidelink transmissions, then PAPR is reduced and power consumption is decreased, but device complexity increases due to peak detection and PSIM processing

Engineering Contradiction:

Improvepower consumptionVSAvoidsignal processing complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The transmitting UE extracts and removes only the peak portions of the signal that exceed the threshold, rather than processing the entire signal, thereby reducing computational complexity while maintaining power savings

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system adjusts the peak suppression threshold parameter to balance between PAPR reduction effectiveness and processing complexity, allowing optimization based on specific operational conditions

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12489665B2Peak suppression for sidelink transmissions

Publication Date: 2025.12.02 QUALCOMM INC

AI summary

A method for wireless communication by a first sidelink user equipment (UE) includes suppressing one or more signal peaks associated with a sidelink message based on a configuration for suppressing the one or more signal peaks associated with the sidelink message. The method also includes selectively transmitting, to a second sidelink UE, a peak information suppression message (PSIM) indicating the one or more suppressed signal peaks and/or one or more filled signal values based on suppressing the one or more signal peaks. The method further includes transmitting the sidelink message, to the second sidelink UE, based on suppressing the one or more signal peaks.