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Frequency diverse array imaging radar signal parameter design method

A technology of imaging radar and design method, applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc., can solve problems such as difficulty in implementation and difficulty

Inactive Publication Date: 2018-08-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

The parameters designed by this method can make the beam effectively cover the specified observation range, but in the specific implementation of the system, it is difficult to implement the method of changing the frequency step to achieve coverage.

Method used

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  • Frequency diverse array imaging radar signal parameter design method
  • Frequency diverse array imaging radar signal parameter design method
  • Frequency diverse array imaging radar signal parameter design method

Examples

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Embodiment

[0047] In this example, the radar is set to be an 8-element uniform linear array, the operating frequency is 9.6GHz, and the imaging range is required to be 2km×1km. The height of the carrier aircraft is 6km, the speed of the carrier aircraft is 300m / s, and the range resolution ρ is required r ≤1m, azimuth resolution requires ρ a ≤1m, gamma r = γ a = 1.25.

[0048] Such as figure 1 shown, including:

[0049] a. Requirements from distance to resolution ρ r ≤1m available So B≥187.5MHz, take B=200MHz

[0050] b. ρ is required by the azimuth resolution a ≤1m available Among them, according to the geometric relationship, r=9.8km and λ 0 =0.03125, then

[0051] c. R can be obtained from the geometric relationship shown in the attached figure 2 = 10.11 km, R 1 =9.5km, ΔR=R 2 -R 1 = 0.61 km.

[0052] again Therefore 324.75Hz ≤ f r’(n-1)×15.79kHz≤f r ≤n×14.84kHz, take f in this example r = 10kHz.

[0053] d. Array element spacing

[0054] e.① ② Consi...

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Abstract

The present invention belongs to the technical field of frequency diverse array radar imaging, and relates to a frequency diverse array imaging radar signal parameter design method. The objective of the invention to provide a frequency diverse array radar signal parameter design method based on any target scene imaging through combination of features of a frequency diverse array radar directionaldiagram for requirement of a radar for scene imaging. The method achieves continuous observation of a target imaging scene through change of radar waveform parameters.

Description

technical field [0001] The invention belongs to the technical field of frequency-controlled array radar imaging, and relates to a signal parameter design method of frequency-controlled array imaging radar. Background technique [0002] The concept of frequency control array (FDA) was first proposed by Antonik et al. at the IEEE Radar Conference in 2006. Compared with traditional array antennas, frequency control array has more system degrees of freedom, and can form regular changes with distance, angle and time. The pattern of the array beam makes the scanning of the array beam more flexible, and also has the ability to distinguish signals in the distance dimension. Due to its significant advantages, it has been extensively studied by scholars at home and abroad once it was proposed. [0003] In a phased array radar system, when the beam direction is determined, the radar can detect targets at any distance in the beam direction if the transmission power is allowed. Frequen...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/02
CPCG01S7/02G01S13/90
Inventor 高洁宗竹林
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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