Positioning Signal Reporting With Doppler-Compensated Carrier Phase
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Solution Overview
Problem
Doppler effects cause inaccuracies in carrier phase-based positioning methods by altering the received carrier frequency, affecting the accuracy of positioning signals in wireless communication systems.
Innovation Solution
A reporting method that involves measuring positioning signals to obtain carrier phase and Doppler parameters, adjusting the carrier phase measurements based on Doppler parameters, and reporting these results to a core network device to ensure accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase based positioning methods are used to improve positioning accuracy, then positioning precision is improved, but Doppler effects cause carrier frequency deviation resulting in measurement inaccuracy
Solution Approach 1:
The patent implements feedback by measuring the Doppler parameter from the positioning signal and using this measurement to compensate for carrier frequency deviations. The system continuously monitors the Doppler effect and adjusts the carrier phase measurement based on this feedback, resolving the contradiction between achieving high positioning accuracy and maintaining measurement reliability under Doppler influence.
Solution Approach 2:
The patent changes the measurement parameters by introducing Doppler parameter measurement and compensation mechanisms. Instead of directly using the raw carrier phase measurement, the system measures the Doppler parameter first and then adjusts the carrier phase based on this parameter, effectively compensating for frequency deviations caused by Doppler effects and resolving the accuracy-reliability contradiction.
2Measurement precision
If Doppler parameter measurement and compensation are implemented, then carrier phase measurement accuracy is improved, but measurement process complexity increases
Solution Approach 1:
The patent merges the Doppler parameter measurement and carrier phase measurement processes into a unified measurement framework. By combining these measurements and using the Doppler parameter to directly compensate the carrier phase within the same processing chain, the system improves measurement accuracy while avoiding the need for separate complex compensation systems.
Solution Approach 2:
The measurement system performs self-service by using its own Doppler parameter measurement capability to compensate for errors in its carrier phase measurement. The system generates its own compensation data from its measurements, eliminating the need for external correction mechanisms and reducing overall system complexity while improving accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the accuracy of carrier phase positioning by compensating for Doppler effects, ensuring precise location calculations in wireless communication systems.
Implementation Method 1
Doppler effects can cause the carrier frequency of the positioning signal received by the receiving device to be lower or higher than the actual carrier frequency when the transmitting device sends the positioning signal
Data Source
AI summary
A reporting method, performed by a terminal device, includes: receiving at least one first positioning signal sent by a first transmission reception point (TRP); measuring the first positioning signal to obtain a measurement result, in which the measurement result includes at least one of a first carrier phase measurement result, a Doppler parameter, or a second carrier phase measurement result, in which the second carrier phase measurement result is obtained by adjusting the first carrier phase measurement result based on the Doppler parameter; and reporting a measurement report to a core network device, in which the measurement report includes the measurement result.