Receiver Path Delay Determination for OTDOA Positioning
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Solution Overview
Problem
Current methods for improving positioning accuracy in OTDOA-based positioning techniques in LTE communication systems require network support, extra hardware, or increased power consumption, limiting their effectiveness without fundamental changes to the satellite-based or communication systems.
Innovation Solution
A method and apparatus for determining receiver path delay by causing a temporary signal variation at the start point of a receiver path, detecting it at the end point, and calculating the time difference as a delay value, which can be used to enhance timing measurement accuracy without additional hardware or network support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (network support, extra hardware, or increased power consumption) are used to improve positioning accuracy, then positioning accuracy is improved, but system complexity and resource requirements increase
Solution Approach 1:
The receiver performs self-calibration by generating its own test signal and measuring the receiver path delay internally, without requiring external network support or additional hardware. The receiver uses its existing transmitter and receiver paths to determine the delay, making the system self-sufficient and avoiding increased complexity
Solution Approach 2:
The method changes the operational parameters of the receiver by temporarily introducing a test signal and measuring the time difference, rather than requiring permanent hardware modifications. This allows dynamic adjustment and measurement of receiver path delay without altering the fundamental system architecture
2Measurement precision
If conventional methods (network support, extra hardware, or increased power consumption) are used to improve positioning accuracy, then positioning accuracy is improved, but resource consumption increases
Solution Approach 1:
The receiver uses its own internal resources (transmitter, receiver path, processor) to perform delay measurement, avoiding the need for additional network resources or external power-intensive hardware. The self-calibration process utilizes existing operational components
Solution Approach 2:
The test signal generation and delay measurement can be performed periodically or on-demand rather than continuously, allowing the system to balance positioning accuracy requirements with power consumption. The receiver can activate the test signal only when positioning updates are needed
3Measurement precision
If conventional methods (network support, extra hardware, or increased power consumption) are used to improve positioning accuracy, then positioning accuracy is improved, but implementation complexity increases
Solution Approach 1:
The receiver implements self-calibration using its existing transmitter and receiver paths, eliminating the need for external calibration equipment or network infrastructure modifications. This simplifies manufacturing and deployment as no additional components or network support are required
Solution Approach 2:
The existing transmitter and receiver paths are used for multiple purposes: normal communication and self-calibration. This multi-functionality eliminates the need for dedicated calibration hardware and simplifies the overall system design and implementation
Data Source
AI summary
Measures for determination of a receiver path delay for timing value measurement. Such measures may comprise causing a temporary signal variation at a start point element of a receiver path for receiving a positioning-related signal for timing value measurement, detecting the temporary signal variation at an end point element of the receiver path, and determining a time difference between a timing of causing the temporary signal variation at the start point element and a timing of detecting the temporary signal variation at the end point element as a delay value of the receiver path.