Carrier-Phase Positioning With Frequency Resource Disambiguation
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Solution Overview
Problem
The ambiguity of whole cycles in carrier phase measurements leads to reduced positioning accuracy, as the number of cycles before the current periodicity of the reference signal is unclear, causing deviations in positioning results.
Innovation Solution
A positioning method that utilizes a frequency domain resource identifier to identify carrier phase information on different frequency domain resources, allowing for accurate determination of the whole cycle part of the carrier phase, thereby enhancing positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase measurement is used for positioning, then positioning accuracy is improved, but ambiguity of whole cycles reduces measurement precision
Solution Approach 1:
The patent segments the carrier phase measurement into two distinct parts: fractional part (less than one cycle) and whole cycle part (integer number of cycles). By separating these components and handling them differently, the system can report the fractional part with high precision while using the frequency domain resource identifier to disambiguate the whole cycle part, thus resolving the information loss problem while maintaining measurement precision.
Solution Approach 2:
The patent introduces a frequency domain resource identifier as an intermediary element that links the carrier phase measurement to its corresponding frequency domain resource. This intermediary resolves the ambiguity of whole cycles by providing additional contextual information that allows the receiving end to correctly interpret the carrier phase value without losing measurement precision.
2Measurement precision
If whole cycle part is included in carrier phase reporting, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the carrier phase information (including both fractional and whole cycle parts) with the frequency domain resource identifier into a single positioning report. This combination allows the whole cycle part to be reported along with its corresponding frequency context, improving positioning accuracy while managing device complexity through integrated reporting rather than separate transmissions.
Data Source
AI summary
A positioning method based on a carrier phase is applied to a first device, and includes: sending a positioning report to a second device, wherein the positioning report includes carrier phase information and a frequency domain resource identifier; wherein the carrier phase information includes at least one of a whole cycle part or a fractional part, and the frequency domain resource identifier indicates a frequency domain resource corresponding to the carrier phase information.