PDOA Location Measurement Using Phase Difference Across Multiple Paths
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Solution Overview
Problem
Current wireless communication systems face challenges in performing accurate location measurement, particularly in environments with multiple paths and frequencies, which are essential for advanced communication technologies like 5G that require lower latency and increased connectivity.
Innovation Solution
The method employs phase difference of arrival (PDOA) for location measurement in wireless communication systems, utilizing multiple paths and frequencies to enhance accuracy and reduce latency, by transmitting and receiving signals with phase difference information across different frequencies and paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase difference of arrival (PDOA) is used for location measurement in environments with multiple paths and frequencies, then location measurement accuracy is improved, but measurement complexity increases
Solution Approach 1:
The patent segments the complex measurement process into distinct steps: receiving reference signals from multiple base stations, measuring phase differences for each path, identifying multiple propagation paths, and calculating location based on combined path information. This segmentation makes the complex PDOA measurement process more manageable and implementable in practical systems.
Solution Approach 2:
The patent extends traditional single-frequency location measurement by incorporating multiple frequencies and multiple propagation paths as additional dimensions. By measuring phase differences across different frequencies and paths, the system creates a multi-dimensional measurement space that improves location accuracy despite increased complexity.
2Measurement precision
If multiple paths and frequencies are utilized for location measurement, then measurement precision is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary actions by having base stations pre-transmit reference signals on multiple frequencies before the actual location measurement is needed. The user equipment also pre-processes received signals to identify propagation paths and measure phase differences, so that when location calculation is required, the heavy lifting has already been done, reducing overall processing time.
Solution Approach 2:
The patent maintains continuous measurement and processing of signals from multiple paths and frequencies rather than performing discrete, intermittent measurements. This continuous action allows for real-time location tracking and reduces the total time needed to achieve accurate location measurements in dynamic 5G environments.
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
This approach enables precise location measurement in complex environments, reducing errors associated with multiple paths and improving the overall performance of wireless communication systems, particularly in 5G networks with increased UE connectivity and lower latency requirements.
Implementation Method 1
Method and device for performing location measurement on basis of pdoa
Data Source
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AI summary
Provided is a method by which a terminal performs location measurement on the basis of a PDOA in a wireless communication system, according to one embodiment of the present description, wherein the method, by which a terminal performs location measurement on the basis of PDOA, comprises: a step for receiving, from a base station, a signal through a plurality of paths; a step for acquiring phase difference information on each of the plurality of paths; and a step for reporting, to the base station, the phase difference information on the basis of the reference signal.