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A Joint Mismatch Filter and Its Design Method for Radar Waveform Diversity

A mismatch filter and radar waveform technology, applied in the field of pulse Doppler radar signal processing, can solve problems such as failure, affecting detection performance, submersion of weak and small targets, etc.

Active Publication Date: 2022-02-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This range sidelobe effect results in pulsed Doppler processing with higher sidelobes in the Doppler dimension
For radar detection, higher side lobes will cause weak targets to be overwhelmed by side lobes of strong scattering targets or interference, seriously affecting detection performance
And because the range sidelobe modulation effect is usually noise-like, the method of using traditional window functions (Hamming window, Chebyshev window, etc.) to suppress sidelobes will fail

Method used

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  • A Joint Mismatch Filter and Its Design Method for Radar Waveform Diversity

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Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0017] The present invention finds through research that the pulse compression output side lobe structure is only related to the absolute value of the Fourier transform spectrum of the pulse during processing. Assuming that all transmitted pulses occupy the same bandwidth, and waveform diversity is generated only by changing the pulse width and intra-pulse modulation mode, then different mismatch filters, that is, joint mismatchers, can be designed according to waveform diversity to change the pulse compression. The spectral structure in the process makes the corresponding pulse compression output after mismatch filtering produce close to the same side lobe structure, thereby effectively suppressing the range side lobe modulation effect.

[0018] Based on the above inventive concepts, a design method of a joint mismatch filter for radar waveform diversity ...

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Abstract

The invention discloses a joint mismatch filter for radar waveform diversity and a design method thereof. Waveform diversity is generated only by changing the pulse width and intra-pulse modulation mode, and then different mismatch filters are designed according to the waveform diversity, namely A mismatcher is used to change the spectrum structure during the pulse compression process, so that the corresponding pulse compression output after the mismatch filter produces a sidelobe structure close to the same, thereby effectively suppressing the range sidelobe modulation effect.

Description

technical field [0001] The invention belongs to the technical field of pulse Doppler radar signal processing, and in particular relates to a joint mismatch filter for radar waveform diversity and a design method thereof. Background technique [0002] Radar waveform diversity technology refers to obtaining the best detection performance by optimizing and changing the radar transmission waveform according to specific radar operation scenarios and tasks. Due to the continuous change of radar waveform between pulses, radar waveform diversity technology can be used in multiple applications such as synthesis bandwidth technology, anti-jamming, and anti-clutter. In recent years, some scholars have also proposed that radar waveform diversity technology can realize the integration of radar communication, that is, the communication information is modulated by changing the radar waveform between pulses, so as to complete the communication function under the premise of realizing the rad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/42G01S7/36G01S7/41G01S7/02H03H17/02
CPCG01S7/42G01S7/36G01S7/414G01S7/415G01S7/418G01S7/023H03H17/0213
Inventor 范花玉孙颖豪毛二可任丽香
Owner BEIJING INSTITUTE OF TECHNOLOGYGY