Jamming Device Frequency Hopping Signal Effectivity Analysis
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Solution Overview
Problem
Existing jamming devices for frequency-hopping spread spectrum signals, such as those used in remote-controlled drones, face challenges in determining the success rate of jamming operations, leading to inefficient frequency spectrum blocking and difficulty in tracking relevant emissions.
Innovation Solution
A jamming device that determines the effectiveness of jamming by comparing detected relevant emissions to expected emissions, using an emission detection unit and effectivity analysis to adjust parameters and improve jamming operations, and includes features like directional antennas for precise signal detection and a display for real-time effectiveness feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the full frequency spectrum is jammed to block FHSS signals, then the jamming effectiveness is improved, but the frequency spectrum is blocked for any other use
Solution Approach 1:
The patent applies local quality by transitioning from full-spectrum jamming to targeted frequency-specific jamming. The system identifies and jams only the specific frequency channels where FHSS signals are detected, rather than blocking the entire frequency spectrum. This localized approach maintains jamming effectiveness while minimizing interference with other legitimate communications.
Solution Approach 2:
The patent segments the frequency spectrum into individual channels and processes them separately. The system divides the broad frequency band into discrete frequency bins, detects signals in each bin independently, and applies jamming only to those bins containing FHSS signals. This segmentation enables precise control over which frequencies are blocked.
2Object-affected harmful factors
If a following jammer is used to track relevant emissions, then the frequency spectrum usage is improved, but the success rate of jamming is difficult to measure
Solution Approach 1:
The patent implements feedback by continuously monitoring the frequency spectrum for FHSS signals and adjusting jamming parameters in real-time. The system measures the power spectral density across frequency bins, identifies FHSS signals based on their characteristic hopping pattern, and dynamically adjusts which frequencies to jam. This closed-loop feedback enables both efficient spectrum usage and measurable jamming success rate.
Solution Approach 2:
The patent applies preliminary action by performing frequency analysis and signal detection before applying jamming. The system first sweeps through the frequency spectrum, identifies potential FHSS signals using correlation detection and power analysis, and then applies jamming only to confirmed signal frequencies. This preliminary detection phase enables accurate measurement of jamming success while optimizing spectrum usage.
3Manufacturing precision
If the jamming device follows frequency hops of FHSS signal, then the jamming precision is improved, but the complexity of tracking emissions increases
Solution Approach 1:
The patent replaces mechanical frequency sweeping with computational signal processing. Instead of physically tuning across frequencies, the system uses digital signal processing to analyze the power spectral density and detect frequency hops. This substitution of mechanical tuning with computational analysis maintains precise frequency tracking while reducing mechanical complexity.
Solution Approach 2:
The patent uses copying by creating a digital representation of the frequency spectrum through power spectral density analysis. The system captures the spectral characteristics of FHSS signals, correlates them with expected hopping patterns, and uses this copied information to guide jamming without requiring direct real-time tracking of each frequency transition.
Data Source
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AI summary
The present invention provides a jamming device (100, 200, 300) for jamming a frequency hopping signal (101, 201, 301), the jamming device (100, 200, 300) comprising at least one receiving antenna (102, 202, 302, 312) configured to receive signals in the signal spectrum of the frequency hopping signal (101, 201, 301), an emission detection unit (104, 204, 304) configured to detect relevant emissions (105, 205, 305) in the received signals (103, 203, 303) that pertain to the frequency hopping signal (101, 201, 301), and an effectivity analysis unit (106, 206, 306) configured to determine and output the effectivity (107, 207, 307) of the emission detection unit (104, 204, 304) based on the number of detected relevant emissions (105, 205, 305) and an expected number of relevant emissions (105, 205, 305) of the frequency hopping signal (101, 201, 301). Further, the present invention provides a respective jamming method.