Radio Node TDOA Positioning Using Scattered Frequency-Modulated Signals
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Solution Overview
Problem
Current positioning methods in wireless communication networks are cumbersome and consume high power, particularly for radio devices.
Innovation Solution
A method involving a radio device that scatters and frequency modulates incoming signals to calculate Time Difference Of Arrival (TDOA) for positioning, using a receiving radio node, radio device, and network node to determine the radio device's location with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If current positioning methods are used in wireless communication networks, then positioning functionality is provided, but power consumption is high and the methods are cumbersome
Solution Approach 1:
The radio device performs self-positioning by scattering incoming signals and measuring the time difference of arrival of scattered signals at multiple receiving radio nodes. This eliminates the need for complex active transmission and processing by the radio device, reducing power consumption while simplifying operation. The positioning function serves itself through the natural propagation characteristics of scattered signals.
Solution Approach 2:
Instead of the radio device actively transmitting positioning signals and receiving nodes passively measuring, the invention inverts the roles: the radio device scatters incoming signals passively, and receiving nodes actively measure the scattered signals. This inversion reduces the operational complexity and power consumption at the radio device while maintaining positioning accuracy.
2Use of energy by moving object
If scattered and frequency-modulated signals are used for positioning, then power consumption is reduced, but signal processing complexity increases
Solution Approach 1:
The scattered and frequency-modulated signal acts as an intermediary that carries positioning information without requiring complex active processing at the radio device. The signal scattering and frequency modulation are passive physical processes that naturally encode timing and identification information, reducing device complexity while enabling power-efficient positioning.
Solution Approach 2:
The invention changes the frequency parameter of the scattered signal through passive frequency modulation by the moving radio device. This natural frequency shift encodes velocity and positioning information without requiring complex active signal generation, reducing power consumption while the receiving nodes process these parameter changes to determine position.
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 method enables efficient, low-power positioning of radio devices by using scattered and frequency-modulated signals, allowing for accurate determination of device location with minimal power usage.
Implementation Method 1
The radio device scatters the first signal and frequency modulates the scattered signal, resulting in a second signal
Implementation Method 2
frequency modulates the scattered signal resulting in a second signal
Implementation Method 3
measures a time of arrival of the first signal... measures a time of arrival of the second signal... calculates a Time Difference Of Arrival, TDOA
Data Source
AI summary
A method performed by a receiving radio node for positioning a radio device is provided. The receiving radio node receives a first signal from a transmitting radio node, and measures a time of arrival of the first signal. The first signal is also received by a radio device. The receiving radio node further receives a second signal from the radio device. The second signal is the first signal that has been scattered and frequency modulated by the radio device when the first signal was received by the radio device. The receiving radio node measures a time of arrival of the second signal. The receiving radio node then calculates a Time Difference Of Arrival (TDOA) based on the measured time of arrival of the first signal and the measured time of arrival of the second signal.