Radio Wave Intensity Positioning in GPS-Denied Areas
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Solution Overview
Problem
Existing information processing devices struggle to accurately determine the current position of a user, especially in environments where GPS signals are unavailable or unreliable, leading to inaccurate or unobtainable location data.
Innovation Solution
An information processing device that acquires the current positions of multiple vehicles, estimates the intensity distribution of radio waves output by these vehicles, and uses this information along with the reception intensity received by a user's terminal to specify the user's position, even when the terminal's own position data is inaccurate or unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS signals are used to determine user position, then position data can be obtained in open environments, but position data becomes inaccurate or unavailable in GPS-denied areas
Solution Approach 1:
The patent introduces radio wave intensity distribution as an intermediary medium to determine user position. Instead of directly using GPS signals, the system uses the intensity distribution of radio waves from multiple vehicles as a mediator to indirectly calculate the user's position, enabling location determination in GPS-denied environments
Solution Approach 2:
The patent replaces the GPS satellite-based electromagnetic positioning system with a ground-based radio wave intensity measurement system. By substituting the mechanical/satellite-based GPS system with a terrestrial radio wave field measurement approach, the system achieves positioning capability in environments where GPS signals are blocked
2Ease of operation
If terminal's own position data is used, then position information can be obtained from the terminal, but the position data is inaccurate when terminal's positioning is unreliable
Solution Approach 1:
The system implements feedback by having the terminal report its received radio wave intensity from multiple vehicles back to the server. The server then uses this feedback information, combined with the intensity distribution model, to calculate and determine the user's actual position, correcting for terminal positioning inaccuracies
Solution Approach 2:
The patent transitions from two-dimensional terminal self-positioning to three-dimensional positioning by incorporating radio wave intensity measurements from multiple vehicles at different spatial locations. This additional dimensional information (intensity values from multiple sources) enables more accurate position determination
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
Enables the accurate determination of a user's position by correlating radio wave intensity distribution and reception intensity, providing reliable location data even in GPS-denied areas, and alerts both the user and vehicle operators when they are within a safety-critical proximity.
Implementation Method 1
estimate an intensity distribution of a radio wave output by each of the vehicles according to the present position of the vehicles
Data Source
AI summary
The information processing device acquires current positions of a plurality of vehicles. Further, the information processing device estimates an intensity distribution of radio waves output by each of the plurality of vehicles according to a current position of the plurality of vehicles. In addition, the information processing device acquires the reception intensity of the radio wave output by each of the plurality of vehicles received by the terminal moving together with the user. Then, the information processing device specifies a position where the intensity distribution and the reception intensity correspond to each other as a current position of the user.