5G NR RF Sensing With Polarization-Based Clutter Rejection

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Solution Overview

Problem

Interference in wireless communication networks due to neighbor network entities and other wireless RF transmitters degrades performance, especially in densely populated areas with increasing mobile broadband access demands.

Innovation Solution

Implementing 5G NR RF sensing with polarization configuration by selecting appropriate antenna polarizations at transmit and receive points to enhance target detection and reject clutter, using polarization indicators for sensing measurements and reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If polarization configuration is implemented for RF sensing, then sensing performance and target detection capability are improved, but system complexity and implementation difficulty increase

Engineering Contradiction:

Improvesensing performanceVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by configuring polarization indicators (such as polarization states, polarization combinations, and polarization weights) for reference sensing signals. This allows the system to optimize sensing performance by adjusting polarization parameters without fundamentally changing the system architecture, thereby improving measurement precision while controlling complexity through parameter optimization rather than structural redesign

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements preliminary action by pre-configuring polarization indicators for transmit and receive reference sensing signals before actual sensing operations. The network entity determines and signals polarization configurations in advance, allowing receiving devices to prepare appropriate polarization settings, which simplifies real-time processing and reduces implementation complexity during active sensing

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If multiple polarization indicators are used for sensing measurements, then interference rejection and target distinction are improved, but signaling overhead and processing complexity increase

Engineering Contradiction:

Improveinterference rejectionVSAvoidsignaling overhead

Core Design Contradiction:

Object-affected harmful factorsVSLoss of information

Solution Approach 1:

The patent applies segmentation by dividing the polarization configuration into separate indicators for transmit signals and receive signals. This allows independent optimization of polarization settings for transmission and reception, enabling better interference rejection through targeted polarization filtering while managing signaling overhead by treating each indicator set separately rather than as a single complex configuration

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements universality by designing polarization indicators that serve multiple functions: they configure antenna port polarizations, enable interference rejection through polarization filtering, and facilitate target distinction via polarization signature analysis. This multi-functionality reduces the need for separate mechanisms for each purpose, thereby managing signaling overhead efficiently

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Improves sensing performance by ensuring strong reflectivity from targets and distinguishing between targets and clutter, enhancing detection and reducing interference.

Implementation Method 1

selecting appropriate antenna polarizations at transmit and receive points to enhance target detection

Methodology Applied

Scientific EffectPolarization: Polarisation

Implementation Method 2

ensuring strong reflectivity from targets

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS12451954B2Fifth generation new radio radio frequency sensing with polarization configuration

Publication Date: 2025.10.21 QUALCOMM INC

AI summary

This disclosure provides systems, methods, and devices for wireless communication that support fifth generation (5G) new radio (NR) radio frequency (RF) sensing with polarization configuration. In a first aspect, a method of wireless communication includes receiving at a network node participating in 5G NR RF sensing a first polarization indicator and a second polarization indicator from a network entity. The first polarization indicator is associated with transmission of a first reference sensing signal and the second polarization indicator is associated with reception of a second reference sensing signal. The network node performs sensing measurements using the first polarization indicator and the second polarization indicator and transmits a sensing measurement report including the sensing measurements associated with the second reference sensing signal to the network entity. Other aspects and features are also claimed and described.