Aircraft Relay Navigation System Resolving GPS Jamming
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Solution Overview
Problem
Current navigation systems for aircraft, such as Loran and Omega radio navigation systems, face limitations due to the decline in base station numbers, large equipment requirements, and reduced navigation accuracy caused by low-frequency signals, especially when GPS signals are unavailable or interfered with, limiting their effectiveness in areas outside the line of sight and prone to jamming.
Innovation Solution
A navigation system that utilizes multiple aircraft-mounted navigation apparatuses to receive and transmit satellite navigation signals, allowing for hyperbola navigation calculations to determine the location of a target aircraft without relying on GPS signals, using a network of aircraft to provide location information and enhance signal strength and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS signals are used for navigation, then navigation accuracy is improved, but the system becomes vulnerable to jamming and signal interference
Solution Approach 1:
The patent introduces non-target aircraft as intermediary nodes that relay navigation signals. These aircraft-mounted navigation apparatuses receive GPS signals and transmit them as radio signals to the target aircraft, serving as mediators that bypass jamming zones and provide alternative signal paths for accurate navigation
2Reliability
If Loran or Omega radio navigation systems are used as alternatives to GPS, then resistance to jamming is improved, but navigation accuracy deteriorates due to low-frequency signals
Solution Approach 1:
The patent changes the frequency parameter of the navigation signals by using standard radio frequency bands (HF, VHF, UHF) instead of the low frequencies used by traditional Loran and Omega systems. This allows the system to maintain jamming resistance while achieving higher navigation accuracy through the use of higher frequency signals
3Reliability
If base station networks are established for alternative navigation, then navigation capability is improved, but device complexity and equipment requirements increase
Solution Approach 1:
The patent implements a self-service navigation network where aircraft themselves serve as navigation signal sources. Each aircraft-mounted navigation apparatus uses its own GPS receiver and transceiver to generate and broadcast navigation signals, eliminating the need for external base stations and reducing system complexity while maintaining navigation capability
4Measurement precision
If GPS signal intensity is increased, then detection accuracy is improved, but the system becomes more susceptible to radio interference
Solution Approach 1:
The patent uses non-target aircraft as intermediary relays that receive weak GPS signals in clean electromagnetic environments and retransmit them to the target aircraft. This intermediary approach maintains signal integrity and detection accuracy while avoiding direct exposure to jamming and radio interference at the target location
Data Source
AI summary
A navigation system includes a receiver and a signal processor. The receiver is mounted on a second aircraft. The second aircraft is an acquisition target of location information. The receiver is configured to receive a navigation signal from each of three or more first aircrafts. The navigation signal includes the location information on a location of the corresponding first aircraft. The navigation signal is transmitted as a radio signal from a navigation apparatus mounted on each of the three or more first aircrafts. The signal processor is mounted on the second aircraft. The signal processor is configured to calculate a location of the second aircraft on the basis of the navigation signal.