Wireless Positioning Using Multi-Time Carrier Phase Measurements
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently and accurately performing positioning procedures, particularly in 5G NR systems, due to limitations in carrier phase positioning accuracy and integer ambiguity resolution, especially with restricted bandwidth and mobility-induced phase variations.
Innovation Solution
A method involving multiple observations of carrier phase measurements (CPM) combined with other positioning measurements (OPM) is introduced, where CPM is performed based on a single time instance and OPM on multiple time instances, with enhanced reporting mechanisms to improve accuracy and resolve integer ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase measurement (CPM) is performed based on a single time instance, then the measurement process is simple and fast, but positioning accuracy is limited due to integer ambiguity and mobility-induced phase variations
Solution Approach 1:
The patent performs CPM at multiple time instances before final positioning calculation, preparing multiple measurement results in advance. This preliminary multi-instance measurement allows the system to resolve integer ambiguity and compensate for mobility-induced phase variations, thereby improving positioning accuracy without excessive complexity in the final calculation step
Solution Approach 2:
The patent uses multiple CPM results from different time instances as feedback to resolve integer ambiguity and improve the final positioning accuracy. By comparing and processing multiple measurement results, the system can identify and correct errors, achieving higher precision while managing complexity through systematic feedback processing
2Measurement precision
If multiple time instances are used for carrier phase measurement, then positioning accuracy and integer ambiguity resolution improve, but the number of measurements and processing complexity increase
Solution Approach 1:
The patent performs CPM at multiple predetermined time instances before final positioning calculation, preparing measurement data in advance. This allows the system to gather sufficient data for accurate integer ambiguity resolution and mobility compensation without delaying the final positioning result, as all measurements are completed beforehand
Solution Approach 2:
The patent performs CPM at periodic time instances, taking measurements at regular intervals. This periodic measurement approach ensures sufficient data points for accuracy improvement while maintaining a predictable and manageable measurement schedule, balancing the need for multiple measurements with time efficiency
3Measurement precision
If carrier phase measurement is performed, then positioning precision can be improved, but integer ambiguity and mobility-induced phase variations create measurement errors
Solution Approach 1:
The patent uses multiple CPM results from different time instances as feedback to detect and correct measurement errors caused by integer ambiguity and mobility-induced phase variations. By comparing measurements across time, the system can identify inconsistent results and apply corrections, thereby maintaining high reliability while achieving improved precision
Solution Approach 2:
The patent performs multiple CPM measurements in advance to establish a baseline of expected phase variations due to mobility. This preliminary measurement phase allows the system to characterize and compensate for mobility-induced errors before final positioning calculation, improving both reliability and accuracy
Data Source
AI summary
Disclosure of this application is related to a method of performing measurement for positioning. The method may comprises performing a first type measurement for positioning including a carrier phase measurement (CPM); performing a second type measurement for positioning which is different from the first type measurement; and reporting both the first type measurement and the second type measurement, and wherein a number of time instances related to the second type measurement may be equal to or greater than that of the first type measurement.