Line-of-Sight Positioning Using Multi-Beam Multipath Separation
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Solution Overview
Problem
Existing positioning systems face challenges in accurately determining position information due to the presence of multipath signals, which can lead to errors and misinterpretation of non-line-of-sight signals as line-of-sight signals, particularly in wireless networks.
Innovation Solution
A method involving the determination of multiple beams, combining received multipath signals, and identifying a line-of-sight signal by assuming delays on a grid with fine resolution, using a non-line-of-sight channel detector, and employing a superimposed channel response to enhance positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods are used, then positioning can be performed, but positioning accuracy deteriorates due to multipath signals and non-line-of-sight conditions
Solution Approach 1:
The patent segments the received signal into multiple beams and processes each beam separately to identify line-of-sight components. By dividing the signal processing into discrete beam segments, the system can distinguish true line-of-sight signals from multipath reflections, thereby improving positioning accuracy while maintaining reliable signal interpretation.
Solution Approach 2:
The patent introduces a non-line-of-sight channel detector as an intermediary component that analyzes channel characteristics before final positioning determination. This intermediary detector examines signal properties such as delay spread and angular spread to identify non-line-of-sight conditions, preventing misinterpretation of reflected signals as direct line-of-sight signals.
2Measurement precision
If beamforming is applied to improve signal directionality, then signal quality improves, but system complexity increases due to multiple beam processing
Solution Approach 1:
The patent combines multiple beam processing results into a unified positioning determination. By merging the information from individual beam analyses, the system achieves improved signal detection accuracy through comprehensive multi-beam processing while managing complexity through systematic integration of beam results rather than handling each beam completely independently.
Solution Approach 2:
The patent processes a plurality of beams beyond what would be minimally required for basic positioning. This excessive action of analyzing multiple beams provides redundant information that improves detection accuracy and enables robust identification of line-of-sight signals, with the added complexity justified by the significant improvement in measurement precision.
Data Source
AI summary
A method, apparatus and computer readable medium are provided for determining position information of a receiver device. The method includes determining a plurality of beams and combining received multipath signals from the plurality of the beams. The received multipath signals are generated by a transmitter device. The method also includes determining, based at least in part on the combined received multipath signals, a line of sight signal and determining, based at least in part on the line of sight signal, position information of a receiver device.