Linear frequency modulation continuous wave system based on chaotic coding frequency agility and application method thereof

Abstract

The invention discloses a linear frequency modulation continuous wave system based on chaotic coding frequency agility and an application method thereof. The system comprises a detector front-end module which transmits a chaotic coding continuous wave frequency modulation detection signal after up-conversion and also receives a target intermediate frequency signal outputted after down-conversion of echoes; a DDS-based signal generator which is used for outputting control word DDS frequency agility linear frequency modulation continuous wave signals through the FPGA; and a digital radio frequency memory (DRFM) which is used for storing, copying, modulating and forwarding the intercepted signal, wherein the deception interference signals have great interference effect for the linear frequency modulation continuous waves. The linear frequency modulation continuous wave are optimized by using the sensitivity, the randomness and great auto-correlation and cross-correlation of the initial value of chaotic coding from the waveform design perspective, chaotic coding frequency hopping is performed on the frequency modulation center frequency and the law of agility is difficult to be intercepted by the enemy so that the anti-deception interference can be realized. The anti-interference capacity of the self-detector can be enhanced from the waveform design perspective and the system has important meaning for the field of short range detection.

Description

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AI Technical Summary

Benefits of technology

This new technology allows an improved version of a missile's radar called LiFAR (Low Frequency Active Radars) without being affected negatively or affect its performance significantly during flight due to factors like beam pointing accuracy and fuel pressure control. By changing certain parameters such as antenna orientation angle, target direction, and altitude, this technology can improve detection capabilities even when there are multiple targets at once on different locations within the airspace around them. Additionally, Chooquist sequences have been used instead of binary codes to simplify the process of decoding signals sent through these systems while still maintaining their effectiveness against jamming attacks. Overall, this innovation enhances both defense capability and coordination between firefight operations effectively.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the accuracy of electronic countermeasures like radios without being able to deceit or prevent their use due to unwanted sources called clutter. Current methods involve modifying the transmitter waveshape pattern to avoid these issues, but they can be limited when dealing with dynamic disturbances caused by pulsation.

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