Multi-Carrier Positioning Signals to Resolve Integer Phase Ambiguity
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Solution Overview
Problem
Existing carrier phase-based positioning methods in NR systems face ambiguity issues with integer number of phase cycles and require efficient configuration and reporting of multi-carrier-frequency positioning signals.
Innovation Solution
A method for signal processing by user equipment (UE) involving acquisition and transmission of positioning signals using multiple carrier frequencies, along with corresponding resources, to address integer ambiguity and facilitate accurate positioning report generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase-based positioning method is used to improve positioning accuracy, then positioning accuracy is improved, but integer ambiguity problem occurs in phase cycles measurement
Solution Approach 1:
The positioning signal measurement is segmented into two parts: integer number of complete phase cycles and fractional part of phase less than a complete cycle. This segmentation allows separate handling of the ambiguity problem while maintaining high positioning accuracy through carrier phase-based methods.
Solution Approach 2:
Multiple carrier frequencies with different wavelengths are introduced as intermediaries to resolve the integer ambiguity problem. By measuring the same transmission distance at different frequencies, the system can solve for the integer number of phase cycles that would otherwise be ambiguous.
2Measurement precision
If multiple carrier frequencies are introduced to solve integer ambiguity, then integer ambiguity problem is resolved, but configuration and reporting complexity increases
Solution Approach 1:
The positioning signal is designed to be universal across multiple carrier frequencies, allowing the same signal structure to be transmitted and measured at different frequencies. This reduces configuration complexity while maintaining the ability to resolve integer ambiguity through multi-frequency measurements.
Data Source
AI summary
A method for signal processing is performed by a user equipment (UE). The method includes: acquiring carrier frequency information of at least two carrier frequencies, wherein the carrier frequencies are used for transmission of a positioning signal; acquiring positioning signal resources corresponding to the respective carrier frequencies; and sending the positioning signal on the basis of the carrier frequency information of the at least two carrier frequencies and the positioning signal resources.