Coherent processing method and processing device for dual-band radar

A processing method and dual-band technology, which can be used in measurement devices, radio wave reflection/re-radiation, radio wave measurement systems, etc. Signal-to-noise ratio, improve radar performance, and solve the effect of large amount of calculation

Active Publication Date: 2022-06-17
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the radar system uses the same carrier frequency between pulses in each band, so the anti-jamming capability of the radar is limited, and the combination of dual-band and agile radar systems needs to be broadened; on the other hand, in terms of dual-band fusion processing , the dual-band fusion technology used in existing research is mostly a data-level fusion method, and the signal-to-noise ratio gain is not high

Method used

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  • Coherent processing method and processing device for dual-band radar
  • Coherent processing method and processing device for dual-band radar
  • Coherent processing method and processing device for dual-band radar

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Experimental program
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Embodiment 1

[0050] See figure 1 , figure 1 A schematic flowchart of a coherent processing method for a dual-band radar provided by an embodiment of the present invention. The coherent processing method includes the steps:

[0051]S1. Obtain the dual-band collaborative agile waveform baseband signal of each pulse when the dual-band system is combined with the agile waveform, wherein the minimum frequency hopping interval of the first frequency band is the same as the minimum frequency hopping interval of the second frequency band, and the first frequency band is the same as the minimum frequency hopping interval of the second frequency band. The frequency hopping codeword of the frequency band is the same as the frequency hopping codeword of the second frequency band. Specifically include steps:

[0052] S11. Obtain the dual-band emission pulse of each pulse when the dual-band system is combined with the agile waveform.

[0053] Specifically, the dual-band radar in this embodiment adop...

Embodiment 2

[0112] On the basis of the first embodiment, this embodiment evaluates the processing result of the above-mentioned coherent processing method.

[0113] Specifically, the evaluation items include main sidelobe ratio, ranging error and velocity error. in,

[0114] Main side lobe ratio: main lobe ratio = main lobe amplitude - first side lobe amplitude, the unit is dB.

[0115] Ranging error: .

[0116] Speed ​​measurement error: .

[0117] 1. Simulation conditions

[0118] Assuming that in the radar observation scene, an ideal point target moves in a straight line at a uniform speed in the radial direction, the radar transmission waveform is formed according to the dual-band agile waveform. The specific waveform and scene parameters are shown in Table 1.

[0119]

[0120] The waveform in the radar observation scene and the specific observation parameters of the target are given in Table 1. The radar transmit waveform adopts a linear frequency modulation signal. It can...

Embodiment 3

[0126] On the basis of Example 1, please refer to Figure 11 , Figure 11 This is a schematic structural diagram of a coherent processing device for a dual-band radar provided by an embodiment of the present invention, where the coherent processing device includes a baseband signal acquisition module, a pulse compression processing module, a pulse signal fusion module, and a target parameter calculation module.

[0127] Specifically, the baseband signal acquisition module is used to acquire the dual-band cooperative agile waveform baseband signal of each pulse when the dual-band system is combined with the agile waveform, wherein the minimum frequency hopping interval of the first frequency band and the minimum frequency hopping of the second frequency band are The interval is the same, and the frequency hopping codeword of the first frequency band is the same as the frequency hopping codeword of the second frequency band. The pulse compression processing module is connected ...

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Abstract

The present invention relates to a coherent processing method and a processing device of a dual-band radar. The coherent processing method includes the steps of: acquiring the dual-band cooperative agile waveform baseband signal of each pulse when the dual-band system is combined with the agile waveform, and the first frequency band The minimum frequency hopping interval is the same as the minimum frequency hopping interval of the second frequency band, and the frequency hopping codeword of the first frequency band is the same as that of the second frequency band; pulse the dual-band cooperative agile waveform baseband signal of each pulse The compression process is used to obtain the dual-band agile pulse pressure output signal of each pulse; the conjugate multiplication is performed on the pulse pressure output signal of the dual-band agile signal of each pulse to obtain a fusion signal; the target parameter information is calculated by using the fusion signal. This method solves the problem of large amount of calculation in the coherent accumulation of the existing frequency-agile waveform based on algorithms such as sparse reconstruction, and obtains a better signal-to-noise ratio, which is of great significance for improving radar performance.

Description

technical field [0001] The invention belongs to the field of digital signal processing, in particular to a coherent processing method and processing device of a dual-band radar. Background technique [0002] Most of the existing target detection methods under the dual-band system only focus on the dual-band radar system under the fixed carrier frequency. Under this condition, there are deficiencies and limitations in the processing of dual-band carrier frequency agile signals in the prior art. On the one hand, in the respective bands, the radar system uses the same carrier frequency between pulses, so the anti-jamming capability of the radar is limited, and the combination of dual-band and agile radar systems needs to be broadened; on the other hand, in terms of dual-band fusion processing , the dual-band fusion technology used in the existing research is mostly a data-level fusion method, and the signal-to-noise ratio gain is not high. SUMMARY OF THE INVENTION [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/08G06F17/16G06F17/14
Inventor 吴耀君刘欣蕊全英汇刘智星杜思予方文邢孟道
Owner XIDIAN UNIV
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