Carrier Phase Positioning for Integer Ambiguity Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accurately measuring distances using carrier phase positioning due to the integer ambiguity problem, which complicates the determination of actual distances between transmission and reception ends.
Innovation Solution
A method for determining a radio frequency at which carrier phase is measured, along with methods to solve integer ambiguity, is proposed for carrier phase positioning (CPP) in downlink, uplink, and sidelink, utilizing channel structures and positioning protocols like LPP, NRPPa, and SLPPa to facilitate accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase positioning is used to measure distance, then positioning precision is improved, but integer ambiguity problem occurs making accurate distance determination difficult
Solution Approach 1:
The patent introduces reference signals as an intermediary carrier to transmit positioning information. The base station embeds positioning data within reference signals that the UE can measure, allowing indirect acquisition of positioning information without directly solving the integer ambiguity problem through complex calculations
Solution Approach 2:
The patent segments the positioning measurement process into multiple independent measurement results from different reference signals. By measuring multiple reference signals separately and combining their results, the system achieves accurate positioning while avoiding the integer ambiguity problem that would arise from attempting a single complex distance calculation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure provides a method and an apparatus for supporting positioning in a wireless communication system. A user equipment (UE) according to an embodiment of the present disclosure may be configured to: receive information associated with carrier phase positioning (CPP) from a location management function (LMF) entity; receive a positioning reference signal (PRS) over a plurality of resources; measure a carrier phase on the basis of the center frequency of a frequency band associated with the plurality of resources; and transmit a measurement report on the carrier phase to the LMF entity.