Radar signal detection method and device, electronic equipment and storage medium

A radar signal and detection method technology, which is applied in the field of signal detection, can solve the problems of inaccurate radar signal threshold setting, detection probability drop, etc., and achieve the effects of suppressing clutter, reducing false alarm rate, and improving signal-to-noise ratio

Active Publication Date: 2020-07-10
四川九洲防控科技有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the present disclosure provides a radar signal detection method, device, electronic equipment, and storage medium, which solves the problems caused by inaccurate threshold setting and the use of a single mean-type constant false alarm detection for radar signals during CFAR detection. The problem of decreasing probability of detection

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  • Radar signal detection method and device, electronic equipment and storage medium
  • Radar signal detection method and device, electronic equipment and storage medium
  • Radar signal detection method and device, electronic equipment and storage medium

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Embodiment 1

[0054] figure 1 For a schematic flowchart of a radar signal detection method provided by an embodiment of the present disclosure, please refer to figure 1 , the present embodiment provides a radar signal detection method, including:

[0055] Step S101: Perform pulse compression processing on the echo signal received by the radar.

[0056] Specifically, suppose the echo signal is s i (t), the impulse response h(t) during the pulse compression process can be expressed by the following formula:

[0057] h(t)=Ks i *(t d -t)

[0058] Among them, t d Is the delay during the pulse compression process, and K is the gain constant.

[0059] Then the signal s after pulse compression processing 0 (t) is the echo signal s i The convolution of (t) with the impulse response h(t) can be expressed as:

[0060] the s 0 (t)=s i (t)*h(t).

[0061] It should be noted that, if figure 2 As shown, pulse compression is realized by passing a large time-width-bandwidth product signal thro...

Embodiment 2

[0105] Figure 11 For a schematic structural diagram of a radar signal detection device provided in an embodiment of the present disclosure, please refer to Figure 11 , this embodiment provides a radar signal detection device 100 , including a pulse compression module 101 , a coherent accumulation and clutter suppression module 102 , a constant false alarm detection module 103 and a result reporting module 104 .

[0106] The pulse compression module 101 is configured to perform pulse compression processing on the echo signal received by the radar.

[0107] The coherent accumulation and clutter suppression module 102 is configured to perform coherent accumulation and clutter suppression processing on the signal after pulse compression processing.

[0108] The CFAR detection module 103 is used to perform CFAR detection on the signals after coherent accumulation and clutter suppression processing by means of a combination of the mean-type CFAR detection method and the ordered s...

Embodiment 3

[0113] An embodiment of the present application provides an electronic device, which may be a mobile phone, a computer, or a tablet computer, etc., and includes a memory and a processor, and a computer program is stored in the memory, and when the computer program is executed by the processor, the following functions are implemented: The radar signal detection method described in the first embodiment. It can be understood that an electronic device may also include a multimedia component, an input / output (I / O) interface, and a communication component.

[0114] Wherein, the processor is configured to execute all or part of the steps in the radar signal detection method in the first embodiment. The memory is used to store various types of data, which may include, for example, instructions of any application or method in the electronic device, as well as application-related data.

[0115] The processor may be an Application Specific Integrated Circuit (ASIC for short), a Digital ...

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Abstract

The invention provides a radar signal detection method, a radar signal detection device, electronic equipment and a storage medium. The radar signal detection method comprises the steps of: performingpulse compression processing on an echo signal received by a radar; performing phase-coherent accumulation and clutter suppression processing on the signal subjected to pulse compression processing;carrying out constant false alarm detection on the signal subjected to phase-coherent accumulation and clutter suppression processing in a mode of combining a mean value type constant false alarm detection method and an ordered statistics constant false alarm detection method to obtain a detection result, wherein a threshold coefficient adopted during constant false alarm detection is a gradual change threshold coefficient, and the gradual change threshold coefficient comes from a threshold coefficient curve obtained by fitting a change trend of a signal-to-noise ratio of the echo signal alongwith the distance. The mean value type constant false alarm detection method and the ordered statistics constant false alarm detection method are complementary, and the detection probability is further improved. Through fitting of the threshold coefficient, optimization of the fixed threshold coefficient is realized, the false alarm rate is reduced, and the performance of the detection algorithmis greatly improved.

Description

technical field [0001] The present disclosure relates to the technical field of signal detection, and in particular to a radar signal detection method, device, electronic equipment and storage medium. Background technique [0002] Radar uses the scattering of electromagnetic waves by the target to find and locate the target. However, there are always various backgrounds around the target, such as ground objects, clouds and rain, sea waves and metal chaff. The echoes generated by these backgrounds Or man-made interference is called clutter. Radar clutter can be mainly divided into motion clutter and fixed clutter. Among them, the center frequency of the fixed clutter is at zero frequency, which is easy to suppress. For the moving clutter, it cannot be suppressed as easily as the fixed clutter because of its unknown Doppler frequency shift. Therefore, in order to cope with the increasingly complex radar working environment, improve the detection ability and reduce the false ...

Claims

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Application Information

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IPC IPC(8): G01S7/292G01S7/02G01S7/32
CPCG01S7/2927G01S7/023G01S7/32Y02A90/10
Inventor 徐好李春林易彬
Owner 四川九洲防控科技有限责任公司
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