Mobile Receiver TDoA Locating Method
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Solution Overview
Problem
Existing TDoA locating systems require multiple stationary receivers, leading to high costs and reduced flexibility, as synchronizing mobile receivers is effort-intensive and costly.
Innovation Solution
A method using a single mobile receiver that moves to different locations to perform measurements, processing the results to determine the emitter's location based on time differences and periodic signal characteristics, reducing hardware and synchronization needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple stationary receivers are used for TDoA locating, then measurement precision is improved, but device complexity and costs increase
Solution Approach 1:
The patent transforms the traditional static receiving system into a dynamic one by moving a single receiver along a predetermined route. The receiver sequentially measures signals at multiple locations (first location, second location, third location), replacing the need for multiple simultaneous stationary receivers. This dynamic approach maintains locating precision while reducing system complexity.
Solution Approach 2:
The patent combines the functions of multiple receivers into a single receiver that performs sequential measurements at different locations. By merging multiple receiving operations into one mobile device, the system reduces hardware complexity and costs while achieving the same locating precision through time-sequential measurements.
2Adaptability or versatility
If multiple mobile receivers are used for flexible locating, then adaptability is improved, but synchronization efforts and costs increase
Solution Approach 1:
The patent employs a single mobile receiver that moves dynamically along a route to achieve flexibility without requiring synchronization between multiple devices. The receiver sequentially visits different locations (first, second, and third locations) to collect measurement data, providing adaptability while eliminating synchronization complexity.
Solution Approach 2:
The patent segments the locating process into sequential measurement stages at different locations along a route. Instead of synchronizing multiple receivers simultaneously, the single receiver performs measurements in sequence at segmented locations, maintaining flexibility while avoiding synchronization requirements.
3Measurement precision
If three receivers are positioned stationary for TDoA locating, then measurement precision is improved, but ease of operation deteriorates due to fixed positions
Solution Approach 1:
The patent converts the static three-receiver system into a dynamic single-receiver system that moves along a route. The receiver sequentially measures signals at multiple predetermined locations, achieving the same locating precision as three stationary receivers while providing operational flexibility through mobile deployment.
Solution Approach 2:
The single mobile receiver performs multiple functions that would traditionally require three separate stationary receivers. By traveling to different locations and performing measurements sequentially, the single device achieves universal locating capability across multiple positions, improving ease of operation while maintaining precision.
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 significantly reduces costs and enhances flexibility by using a single receiver, allowing for efficient and precise location determination of emitters with minimal hardware and synchronization efforts.
Implementation Method 1
The respective signal runtimes are determined based on the signals received. The respective runtimes determined are evaluated further in order to determine the location of the emitter of the signal. The signal runtimes are used to determine the time difference of arrival which is the difference between time of arrivals (TOAs) at the respective locations of the receivers.
Data Source
Figure 1~3
AI summary
The invention relates to a method of Time Difference of Arrival (TDoA) locating an emitter (12) that emits a signal by means of a mobile receiver (14). A first measurement of the signal is performed at a first location (24), thereby obtaining first measurement results. A second measurement of the signal is performed at a second location (26), thereby obtaining second measurement results. A third measurement of the signal is performed at a third location (32), thereby obtaining third measurement results. The first measurement results, the second measurement results and the third measurement results are processed, thereby determining the location of the emitter (12). At least one of the second location (26) and the third location (32) is determined based on a reception range. Further, a locating system (10) is described.