Chirp Noise Generation for Rapid Electronic Warfare Jamming
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Solution Overview
Problem
Digital radio frequency memory (DRFM) systems require a certain time period to generate noise corresponding to a threat signal, which can be disadvantageous in electronic warfare applications where rapid noise generation is needed.
Innovation Solution
A chirp noise generation device and method that synthesizes a receipt signal with chirp noise to generate a jamming signal within a single pulse, using a signal analysis unit and digital frequency storage to determine the pulse width and chirp noise modulation bandwidth, and summing the phases of the receipt and chirp noise signals to create a jamming signal with a combined frequency bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital radio frequency memory uses linear feedback shift register to generate noise of one frequency for a certain period, then noise can be generated, but a certain time period is required up to when target bandwidth is generated which delays the electronic attack response
Solution Approach 1:
The system performs preliminary action by storing the received signal in advance in the digital frequency storage unit. When electronic attack is required, the stored signal is immediately processed and synthesized with chirp noise to generate the jamming signal, eliminating the time delay associated with generating noise from scratch using traditional LFSR methods.
Solution Approach 2:
The invention merges the received signal with chirp noise in the digital frequency storage unit to create a composite jamming signal. This combining approach allows the system to leverage both the stored signal characteristics and the chirp noise properties to achieve rapid bandwidth generation without the time penalty of traditional sequential generation methods.
2Reliability
If traditional noise generation methods are used in digital radio frequency memory, then noise can be generated, but the process is too slow for rapid electronic attack requirements
Solution Approach 1:
The received signal is stored in advance in the digital frequency storage unit, preparing the data in advance for rapid processing. This preliminary storage action enables the system to generate jamming signals at high speed when electronic attack is required, as the signal data is already available and does not need to be generated from scratch.
Solution Approach 2:
The invention replaces the traditional mechanical LFSR-based noise generation system with a digital signal processing approach using digital frequency storage and chirp synthesis. This substitution enables much faster signal generation speeds by utilizing digital processing capabilities rather than sequential mechanical or electronic counter-based methods.
3Productivity
If the received signal is stored and synthesized with chirp noise, then rapid jamming signal generation is achieved, but the device complexity increases with additional components
Solution Approach 1:
The digital frequency storage unit serves multiple functions: it stores the received signal, generates chirp noise, and synthesizes the jamming signal by combining both. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity while achieving rapid signal generation.
Solution Approach 2:
The invention combines the signal storage, noise generation, and signal synthesis functions into a single integrated digital frequency storage unit. This merging of functions reduces the number of separate components needed compared to traditional systems that would have separate units for each function, thus limiting the increase in device complexity.
Data Source
AI summary
A chirp noise generation device for a compressed pulse signal includes: a receiving antenna; a signal analysis unit configured to determine whether to perform an electronic attack by analyzing a receipt signal that is inputted through the receiving antenna; and a digital frequency storage configured to store the receipt signal that is inputted through the receiving antenna, to generate a chirp noise by using the receipt signal, to generate a jamming signal by synthesizing the receipt signal and the chirp noise, and to transmit the jamming signal when a control command indicating that the electronic attack needs to be performed is received from the signal analysis unit.