Carrier-Phase Positioning Reference Signals for Stable Mobile Measurements

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Solution Overview

Problem

Existing carrier phase-based positioning methods face challenges in rich-scattering environments and when terminals are moving, due to issues like multi-path effects, Doppler frequency shifts, interference from adjacent cells, and oscillator instability, leading to phase shifts and cycle slips, which complicate accurate positioning measurements.

Innovation Solution

A method involving a transmitter that configures and transmits a carrier phase-based positioning reference signal, and a receiver that performs measurements and reports results, utilizing techniques to mitigate phase shifts and interference, such as generating periodic signals and mapping these signals to reduce multi-path effects and interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If carrier phase-based positioning is used to achieve high positioning accuracy, then positioning precision is improved, but reliability deteriorates due to phase shifts and cycle slips in rich-scattering environments

Engineering Contradiction:

Improvepositioning accuracyVSAvoidmeasurement stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent segments the positioning measurement process into multiple independent measurements taken at different time points. Instead of relying on a single carrier phase measurement that is vulnerable to cycle slips, the system performs multiple measurements and processes them collectively to achieve both high precision and reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary actions by performing multiple carrier phase measurements before final positioning calculation. The system collects a series of phase measurements over time and applies processing techniques (such as phase unwrapping and statistical methods) to resolve ambiguities and eliminate the effects of temporary phase disruptions before determining the final position.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple measurements are performed to improve reliability, then measurement stability is improved, but time consumption increases

Engineering Contradiction:

Improvemeasurement stabilityVSAvoidmeasurement time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements periodic measurements at optimized time intervals that balance reliability improvement with time efficiency. The measurement frequency and total measurement duration are carefully selected to achieve the required reliability level while minimizing time consumption, avoiding both excessive measurement frequencies and insufficient sampling.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent replaces traditional mechanical waiting time with computational efficiency. Instead of simply extending measurement time linearly to improve reliability, the system uses efficient signal processing algorithms and mathematical methods to extract reliable positioning information from multiple measurements, significantly reducing the time penalty associated with repeated measurements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If complex signal processing is applied to mitigate multi-path effects and interference, then positioning accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsignal processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts and processes only the essential carrier phase information from the received signal, separating the critical positioning data from unnecessary signal components. By focusing on extracting phase differences directly and processing only the relevant measurement data rather than performing complex full-signal analysis, the system achieves high accuracy while maintaining relatively simple device implementation.

Inventive Principle:

Principle #2Taking out (Extraction)

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

Enhances positioning accuracy and reduces complexity by directly calculating carrier phase differences, achieving 0.3 m user-level accuracy and 15 ms latency with improved robustness against environmental interference.

Implementation Method 1

transmitting the reference signal for carrier phase-based positioning to the receiver

Methodology Applied

Scientific EffectElectromagnetic radiation:

Implementation Method 2

performing a carrier phase-based positioning measurement on the reference signal

Methodology Applied

Scientific EffectElectromagnetic signal detection:

Data Source

PatentUS12587869B2Methods performed by receiver and transmitter in communication system and devices

Publication Date: 2026.03.24 SAMSUNG ELECTRONICS CO LTD

AI summary

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Methods and devices are provided in a communication system. A method performed by a transmitter in a communication system. Configuration information of a reference signal for carrier phase-based positioning is transmitted to a receiver. The reference signal for carrier phase-based positioning is transmitted to the receiver. A measurement result that is based on the reference signal for carrier phase-based positioning is received from the receiver.