Non-Tracking Jamming Signal Generation for HPRF Multi-Stagger Radar
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Solution Overview
Problem
Anti-aircraft radar systems using high period repetition frequency (HPRF) face challenges in responding to electronic warfare due to short pulse periods and difficulty in tracking multiple frequencies, leading to distance ambiguity and vulnerability to DRFM receivers.
Innovation Solution
A non-tracker apparatus and method that includes a video signal detecting unit, additional noise generating unit, stored signal processing unit, and transmission signal gain controller to generate a jamming signal by mixing additional noise with reception signals and storing them in a non-tracking manner, allowing for continuous output even with HPRF using multi-stagger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HPRF with short pulse period is used to acquire Doppler information, then Doppler information in frequency domain can be acquired, but distance ambiguity occurs
Solution Approach 1:
The patent applies dynamics by making the pulse repetition period variable through multi-stagger technique. Instead of using a fixed short pulse period that causes distance ambiguity, the system dynamically changes the pulse repetition period according to a predetermined pattern, allowing the radar to resolve distance ambiguity while maintaining Doppler measurement capability.
2Reliability
If DRFM is used to respond to electronic warfare by tracking HPRF, then response capability is improved, but it becomes difficult to respond to multiple HPRFs and multi-stagger patterns
Solution Approach 1:
The patent inverts the conventional tracking approach by using non-tracking signal generation. Instead of analyzing and tracking the incoming HPRF signal to generate a response, the system generates a response signal based on predetermined parameters without performing tracking analysis. This inversion allows the system to respond to multiple HPRF patterns and multi-stagger configurations simultaneously.
Solution Approach 2:
The patent achieves universality by designing a signal generation system that can handle multiple HPRF frequencies and multi-stagger patterns through a single non-tracking mechanism. The system uses a universal response generation approach that does not require separate tracking processes for different radar configurations, making it adaptable to various electronic warfare scenarios.
3Manufacturing precision
If tracking-based DRFM is used for HPRF response, then signal reproduction accuracy is improved, but device complexity and difficulty in handling multi-stagger increases
Solution Approach 1:
The patent extracts the tracking function from the signal generation process. By removing the complex tracking analysis component and retaining only the essential signal reproduction capability, the system achieves simpler device architecture while maintaining adequate response accuracy for electronic warfare applications.
Data Source
AI summary
An apparatus for generating a signal with a non-tracker includes a video signal detecting unit detecting a video signal from a reception signal and outputting a video signal exceeding a threshold, an additional noise generating unit mixing the reception signal with additional noise and outputting the reception signal mixed with the additional noise, a stored signal processing unit storing and outputting the reception signal mixed with the additional noise when the video signal exceeding the threshold is input, and a transmission signal gain controller combining a first signal, which is the reception signal mixed with the additional noise transmitted from the additional noise generating unit, and a second signal stored in and output from the stored signal processing unit, and outputting a combined signal.