Tone Reservation Configuration for Machine-Learned PAPR Reduction

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Solution Overview

Problem

High peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) systems leads to performance degradation due to signal distortion and interference, necessitating an effective method for PAPR reduction.

Innovation Solution

Implementing tone reservation (TR) with machine learning to generate PAPR reduction signals, utilizing reservation patterns and AI models for optimizing reserved resources, and configuring these resources through signaling between wireless devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If tone reservation with machine learning is implemented to reduce PAPR, then PAPR reduction effectiveness is improved, but computational complexity increases

Engineering Contradiction:
ImprovePAPR reduction effectivenessVSAvoidcomputational complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-training machine learning models offline to generate PAPR reduction signals. The models are trained beforehand on extensive datasets and then deployed for real-time operation, where they can quickly generate reduction signals without requiring complex real-time computation. This shifts the computational burden from runtime to training time, resolving the contradiction between effectiveness and computational complexity.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating simplified versions of complex PAPR reduction algorithms through machine learning models. Instead of implementing complex heuristic algorithms during transmission, the system learns optimal reduction patterns during training and copies these patterns into compact model structures that can be efficiently deployed, maintaining effectiveness while reducing runtime computational complexity.

Inventive Principle:
Principle #26Copying

2Reliability

If reserved resources are allocated for PAPR reduction signals, then PAPR is reduced, but signaling overhead increases

Engineering Contradiction:
ImprovePAPR reductionVSAvoidsignaling overhead
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The patent applies segmentation by dividing the reserved resources into specific patterns with predetermined structures. Instead of arbitrarily allocating resources, the system defines segmented patterns (e.g., contiguous subcarriers, periodic patterns) that can be efficiently indicated through compact signaling. This structured segmentation reduces the number of bits needed to describe resource allocations while maintaining effective PAPR reduction.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent uses parameter changes by representing reserved resource allocations through a small set of key parameters (e.g., starting position, length, pattern type) rather than detailed bitmaps. By changing the representation from exhaustive resource indication to compact parameter-based description, the system achieves effective resource reservation with minimal signaling overhead.

Inventive Principle:
Principle #35Parameter changes

3Productivity

If reserved resources overlap with physical channels, then resource utilization is improved, but signal distortion increases

Engineering Contradiction:
Improveresource utilizationVSAvoidsignal distortion
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent applies taking out by extracting the PAPR reduction function from the data-carrying subcarriers and placing it in dedicated reserved resources. When reserved resources overlap with physical channels, the system extracts the necessary information from overlapping channels and processes them separately, ensuring that PAPR reduction signals are generated without causing interference to channel data, thus maintaining resource utilization while avoiding signal distortion.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses an intermediary approach by introducing a separate processing stage for handling overlaps between reserved resources and physical channels. The system identifies overlapping regions and applies specific handling mechanisms (such as rate matching or puncturing) as intermediary steps between resource allocation and signal transmission, preventing direct interference while maintaining efficient resource utilization.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12438761B2Configuration method for tone reservation
Publication Date: 2025.10.07 ZTE CORP
  • US12438761B2 patent drawing
  • US12438761B2 patent drawing
  • US12438761B2 patent drawing

AI summary

A wireless communication method for use in a first wireless device is disclosed. The method comprises transmitting, to a second wireless device, configuration information associated with reserved resources within a plurality of resources.