PRS Phase Noise Compensation Using Single-Subcarrier Symbol Estimates
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Solution Overview
Problem
The challenge in 5G wireless communication systems is the significant impact of phase noise on positioning reference signals (PRS), which affects the accuracy and reliability of positioning processes, particularly in high-frequency bands like FR2, where phase noise compensation methods are inadequate.
Innovation Solution
A method and device for compensating phase noise in PRS by determining a phase noise estimate for each symbol based on a set of resource elements on a single subcarrier and applying this estimate to compensate for phase noise across the remaining subcarriers, enhancing phase noise mitigation in PRS processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase noise compensation is performed using conventional methods in 5G high-frequency bands, then positioning reference signals can be processed, but the accuracy and reliability of positioning are significantly degraded due to inadequate phase noise mitigation
Solution Approach 1:
The patent segments the phase noise compensation process by determining phase noise estimates for each symbol individually based on resource elements on a single subcarrier, then applying these estimates across remaining subcarriers. This per-symbol segmentation allows adaptive compensation that addresses the time-varying nature of phase noise in high-frequency 5G bands, thereby improving both positioning accuracy and reliability
Solution Approach 2:
The patent changes the approach to phase noise compensation by using resource elements on a single subcarrier to estimate phase noise parameters for each symbol, then applying these parameter estimates across multiple subcarriers. This parameter-based compensation method adapts to the specific characteristics of high-frequency bands, resolving the inadequacy of conventional fixed methods and improving positioning performance
2Measurement precision
If phase noise compensation is applied across all subcarriers for each symbol, then positioning accuracy improves, but the processing complexity and computational load increase
Solution Approach 1:
The patent extracts phase noise characteristics from a limited set of resource elements on a single subcarrier for each symbol, then applies these extracted estimates across remaining subcarriers. By taking out only the essential phase noise parameters from a small subset of resources and reusing them, the method achieves effective compensation without the computational burden of processing all subcarriers independently, thus improving accuracy while controlling complexity
Solution Approach 2:
The patent creates universal phase noise estimates for each symbol that can be applied across multiple subcarriers. These single-subcarrier-derived estimates serve multiple subcarriers, making the compensation process more efficient. This multi-functional approach allows the same estimation process to benefit numerous subcarriers, improving overall PRS processing accuracy without proportionally increasing complexity
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a receiver device receives a positioning reference signal (PRS) resource comprising a plurality of resource elements of at least one physical resource block in at least one slot, the plurality of resource elements spanning a plurality of symbols of the at least one slot and a plurality of subcarriers of the at least one physical resource block, determines a phase noise estimate for each of the plurality of symbols based on a set of resource elements of the plurality of resource elements on a single subcarrier of the plurality of subcarriers, and compensates for phase noise across the plurality of symbols for remaining subcarriers of the plurality of subcarriers based on the phase noise estimate for each of the plurality of symbols.