Time of Arrival Determination in Wireless Positioning
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Solution Overview
Problem
Existing methods for determining the time of arrival (TOA) in wireless communication systems, such as those used in 4G and 5G networks, are prone to errors in complex multipath environments due to noise interference.
Innovation Solution
A method and apparatus for determining TOA that involves determining a detection start time on a correlation waveform based on a leading edge detection threshold, calculating a noise threshold, and using these thresholds to determine a quasi-TOA and subsequently the TOA, while accounting for noise fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional TOA determination methods are used in complex multipath environments, then positioning can be performed, but noise interference causes large errors and reduces positioning precision
Solution Approach 1:
The patent segments the TOA determination process into multiple distinct steps: initial TOA estimation, identification of multipath components, and refined TOA calculation. By dividing the measurement process into separate stages, each targeting specific error sources, the method systematically eliminates noise and multipath interference to improve measurement precision
Solution Approach 2:
The patent performs preliminary actions by first estimating the initial TOA and identifying multipath components before calculating the final TOA. This preliminary analysis of the signal structure allows the method to anticipate and compensate for noise and interference effects in subsequent calculations
2Measurement precision
If simple TOA determination methods are used, then the process is fast and simple, but positioning precision deteriorates in complex environments
Solution Approach 1:
The patent divides the complex measurement process into modular segments that can be independently implemented and optimized. Each segment addresses a specific aspect of signal analysis, making the overall complex process manageable and implementable through standardized operations
Solution Approach 2:
The patent incorporates feedback mechanisms where the identified multipath components and noise characteristics from initial measurements are used to refine the final TOA calculation. This feedback loop allows the system to adapt to complex environmental conditions and improve precision without requiring completely new measurement approaches
Data Source
AI summary
A method and device for determining a time of arrival (TOA), a terminal device, and a non-transitory computer-readable storage medium are disclosed. The method may include: determining a detection start time on a correlation waveform based on a leading edge detection threshold; determining a noise threshold on the correlation waveform, and determining a quasi-TOA according to the detection start time; and determining the TOA according to data information in a target area of the correlation waveform and the noise threshold, where the target area is determined based on the quasi-TOA and a detection length.