Radar advanced interference FPGA implementation method based on intermittent sampling and forwarding

Abstract

The invention, which belongs to the field of active self-protection interference, particularly relates to a radar advanced interference FPGA implementation method based on intermittent sampling and forwarding. Distortion-free intermittent sampling, coherent storage and forwarding of a radar signal are completed by using the digital radio frequency storage technology to obtain a coherent advance interference signal related with the radar signal; the interference signal is matched and filtered at a radar receiving end to obtain a high coherence processing gain. A transceiver antenna, a radio frequency receiving and transmitting module, an ADC sampling module, a digital signal processing module, a DAC analog-to-digital conversion module, a serial port communication module and a power supply module are arranged. Therefore, when a jammer and a target share one platform, an advance interference signal is generated and confronting with the radar with the anti-jamming technology is realized, so that the target is protected effectively.

Description

technical field [0001] The invention belongs to the field of active self-defense jamming, and aims at the situation that a jammer and a target share a platform, and proposes a radar advance jamming FPGA implementation method based on intermittent sampling and forwarding. Background technique [0002] For radars using coherent processing technology, digital radio frequency storage technology, DRFM, is used in the design of jammers to sample radar signals without distortion, coherently store and forward them, and obtain interference signals that are coherent with radar signals. After matched filtering, a high coherent processing gain can be obtained. However, there is a processing delay in forwarding jamming. When the radar adopts anti-jamming technology, such as pulse front tracking technology, the jamming signal emitted by the jammer cannot effectively protect the target. [0003] Full-pulse store-and-forward jamming has high requirements on the isolation of the jammer's an...

AI Technical Summary

Problems solved by technology

However, there is a processing delay in forwarding interference. When the radar adopts anti-jamming technology, such as pulse front tracking technology, the jamming signal emitted by the jammer cannot effectively protect the target.

[0003] Full-pulse store-and-forward jamming has high requirements on the isolation of the jammer's antenna, which is difficult to achieve in practical applications. Intermittent sampling and forwarding jamming can not only reduce the requirements for antenna isolation, but also generate a group of false targets that are coherent with the radar signal. Signal

There are two main methods of radar lead jamming: one is to use repetition frequency tracking technology to realize lead jamming, which cannot effectively interfere with radars with changing repetition frequency; the other is to use frequency shifting technology to realize lead jamming. The prior information requirements for radar signals are relatively high, and it is difficult to realize

To sum up, there is not yet a highly feasible radar advanced jamming method at present, therefore, the present invention has important practical application value

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