UAV Navigation Using Jamming Signal Strength Localization
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face navigation challenges in jamming zones where radio signal jamming disrupts GPS signals, existing solutions rely on cameras or require known jammer attributes, and are ineffective without cameras or extensive hardware modifications.
Innovation Solution
A method and system that uses received signal strength (RSS) measurements of jamming signals to determine jammer location and navigate within a jamming zone by analyzing signal strength, employing curve-fitting algorithms and adjusting movement paths to maintain constant signal strength, allowing UAVs to reach coordinates without relying on cameras or additional hardware modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio signal jamming is used to prevent UAV navigation, then the ability to control and locate UAVs is improved, but the UAV's navigation capability within the jamming zone deteriorates
Solution Approach 1:
The patent converts the harmful jamming signal into a useful navigation aid by using the Received Signal Strength (RSS) of the jamming signal to determine relative position and location. Instead of treating the jamming signal purely as interference to be avoided, the system exploits its presence to enable navigation within the jamming zone, effectively turning the adversary's weapon into a navigation tool.
2Ease of operation
If camera-based solutions are used for navigation within jamming zones, then navigation capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent enables the UAV's existing radio communication system to serve dual purposes: both receiving navigation commands and detecting jamming signals for position determination. The same antenna and receiver that are already part of the UAV's standard equipment are used to measure RSS of jamming signals, eliminating the need for separate camera systems or additional specialized hardware.
3Reliability
If extensive hardware modifications are made to enable navigation in jamming zones, then navigation reliability is improved, but ease of manufacture and deployment deteriorates
Solution Approach 1:
The patent makes the UAV's communication system multi-functional by enabling it to perform both its original navigation command reception function and the additional function of jamming signal detection and RSS measurement. This universal approach allows a single system to handle multiple tasks without requiring separate specialized hardware for each function.
4Measurement precision
If solutions requiring known jammer attributes are used, then navigation accuracy is improved, but adaptability to unknown jammers deteriorates
Solution Approach 1:
The patent performs preliminary characterization of the jamming environment by measuring RSS at different positions and using curve-fitting algorithms to establish the spatial distribution pattern of the jamming signal. This preliminary action creates a model of the jammer's behavior that can then be used for navigation even when the jammer's specific attributes are initially unknown, allowing the system to adapt to any jamming scenario.
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 UAVs to operate within jamming zones by determining jammer location and maintaining navigation using RSS measurements, effectively neutralizing the impact of jamming signals and enhancing navigation capabilities.
Implementation Method 1
The navigation support system receives a jamming signal, employed by a jammer, located within the jamming zone. The navigation support system measures a received signal strength of the jamming signal.
Implementation Method 2
The navigation support system performs movement based at least partially on the received signal strength. The navigation support system repeatedly measures the received signal strength and performs moving based on the received signal to determine a jammer location.
Data Source
AI summary
The presently disclosed method and system exploits a received signal strength of a jamming signal emitted by a jammer to allow navigation of an object through an area containing the jamming signal. In one embodiment, the method comprises receiving a plurality of navigation data and a jamming signal when entering a jamming zone. The method then comprises repeatedly measuring the strength of the jamming signal while moving within the jamming zone. The method then comprises determining the location of the jammer based on the movement within the jamming zone and the strength of the jamming signal at multiple coordinates. The method further comprises performing movement to destination coordinates within the jamming zone at least partially based on the jammer location and the strength of the jamming signal.