IFF Pulse Jam Detection via Real Signal Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Identification Friend or Foe (IFF) systems are susceptible to false pulse jam indications in crowded environments, leading to unnecessary desensitization of receivers and reduced detection range, as they detect pulse jams based solely on overall pulse rate without distinguishing between real and jamming pulses.
Innovation Solution
Implementing a method to detect pulse jams by calculating the jamming pulse rate by subtracting the real pulse rate from the overall pulse rate, allowing for more accurate identification of interference and reducing false indications, thereby maintaining receiver sensitivity and detection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IFF systems detect pulse jams based solely on overall pulse rate, then they can identify potential interference, but they generate false pulse jam indications in crowded environments leading to unnecessary receiver desensitization
Solution Approach 1:
The patent segments the overall pulse rate into two distinct components: real pulse rate (from valid IFF signals) and jamming pulse rate (from interference signals). By separating these components and measuring them independently, the system can accurately identify true pulse jams without false indications from crowded environments. This segmentation resolves the contradiction by enabling reliable detection while maintaining measurement precision.
2Object-affected harmful factors
If IFF systems desensitize receivers in response to detected pulse jams, then they reduce the impact of jamming signals, but they reduce detection range due to unnecessary desensitization from false indications
Solution Approach 1:
The patent implements a feedback mechanism where the pulse jam detection result directly controls the receiver desensitization state. By using the accurate jamming pulse rate (rather than overall pulse rate) as the feedback signal, the system only desensitizes the receiver when true pulse jams are detected, avoiding unnecessary desensitization from crowded environments. This resolves the contradiction by maintaining detection range while protecting against actual jamming.
3Device complexity
If IFF systems use overall pulse rate for jam detection, then the detection process is simple, but they cannot distinguish between real and jamming pulses leading to false indications
Solution Approach 1:
The patent segments the pulse detection process into two distinct measurement stages: measuring the overall pulse rate and measuring the real pulse rate separately. This segmentation allows the system to compute the jamming pulse rate by subtracting real pulses from overall pulses, providing accurate identification without excessive complexity. The segmented approach resolves the contradiction by maintaining reasonable system complexity while dramatically improving reliability.
Data Source
AI summary
Techniques are disclosed for determining the presence of pulse jams in an identification friend or foe (IFF) system. In an embodiment, a plurality of jamming pulse rates are determined. Each of the plurality of jamming pulse rates is a count of jamming pulses entering the IFF system during a corresponding integration period. Each of the plurality of jamming pulse rates is a count of jamming pulses associated with non-valid signals entering the IFF system. An average jamming pulse rate is computed based on the plurality of jamming pulse rates. The average jamming pulse rate is then compared against a pulse jam threshold to determine whether a pulse jam is present (or not present) in the IFF system.