UE PRS Windowing for Multipath Positioning Measurements
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining positioning measurements due to multipath channels, which affect the reliability and precision of positioning reference signals (PRS) processing.
Innovation Solution
The implementation of a method and apparatus in user equipment (UE) that applies multiple positioning reference signal (PRS) processing windows to a PRS resource over a multipath channel, determining channel estimates, and calculating positioning measurements based on these windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple PRS processing windows are applied to handle multipath channel effects, then positioning measurement accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent divides the PRS processing into multiple processing windows (first processing window and second processing window) that operate on different portions of the PRS resource. Each window independently processes specific multipath components, allowing the system to handle complex multipath channels through segmented analysis rather than treating the entire signal as a single unit, thus improving measurement accuracy while managing processing complexity.
Solution Approach 2:
The patent introduces a time-domain dimension by applying processing windows at different time offsets relative to the PRS resource. The first processing window is applied at a first time offset and the second processing window at a second time offset, enabling the system to capture and process multipath components that arrive at different times, thereby improving positioning accuracy in multipath environments.
2Reliability
If multiple PRS processing windows are applied to capture multipath components, then positioning reliability is improved, but computational load increases
Solution Approach 1:
The patent segments the PRS resource processing into multiple dedicated processing windows, where each window is configured to capture specific multipath components. This segmentation allows the UE to reliably estimate different propagation paths independently, improving positioning reliability in multipath environments while organizing computational tasks in a structured manner that can be optimized for energy efficiency.
Solution Approach 2:
The patent performs preliminary channel estimation by applying processing windows to capture multipath components before final positioning measurement. The UE determines channel estimates based on the processed PRS resources from multiple windows, preparing the data in advance for more accurate positioning calculations, which improves reliability while allowing computational resources to be efficiently managed.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) applies a plurality of positioning reference signal (PRS) processing windows to a PRS resource received from a network node over a multipath channel, determines a plurality of channel estimates for the PRS resource based on the plurality of PRS processing windows, and determines a positioning measurement of the PRS resource based on the plurality of channel estimates.