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Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar

A technology of target distance and azimuth angle, applied in the field of frequency diversity array radar and radar, it can solve the problem of unanswered, unsolved FDA radar coupling problem, etc., and achieve the effect of overcoming the coupling problem

Inactive Publication Date: 2013-04-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The existing technology analyzes the distance-dependent characteristics of the FDA radar beam, but does not answer how to effectively use this distance-dependent characteristic, nor solve the coupling problem existing in the FDA radar when estimating the target range and azimuth, namely: The transmit beam cannot be focused on the desired target point, but is distributed into a "peak ridge" coupled in the range and azimuth directions, such as figure 1 shown

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  • Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar
  • Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar
  • Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar

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Embodiment Construction

[0038] The implementation manner of the technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0039] This specific implementation mode takes an X-band FDA radar as an example, and its carrier frequency f 0 =10Hz, frequency deviation Δf 1 = 30kHz, Δf 2 = 10kHz. Suppose a uniform linear array has 10 transmitting array elements and 10 receiving array elements, and the interval between the array elements is half a wavelength (λ=c 0 / f 0 ), the target is located at azimuth angle θ=10° and distance r=10km.

[0040] like image 3 Shown, a kind of method that the present invention proposes uses FDA radar to estimate target range and azimuth angle and comprises the steps:

[0041] 1) Divide the transmitting array elements of the radar into the first transmitting sub-array and the second transmitting sub-array with the same number of array elements. When the number of the transmitting array elements is an ...

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Abstract

The invention belongs to the technical field of frequency distribution array (FDA) radars and discloses a method for utilizing a frequency distribution array (FDA) radar to estimate an object distance and an azimuthal angle. The method comprises the steps of dividing transmitting array elements of the radar into a first transmitting subarray and a second transmitting subarray with equal array element numbers, generating transmitting signals of the two transmitting subarrays, and estimating the azimuthal angle of the distance of an object. According to the method, the distance dependence characteristics of FDA radar beam can be effectively utilized to perform joint estimation on the azimuthal angle of the distance of the object, and the coupled problem which occurs when the FDA radar is utilized to estimate the distance and the azimuthal angle of the object is solved.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to the technical field of frequency diversity array (FDA) radar. Background technique [0002] Phased array radar can freely realize the spatial scanning of the beam, so it is widely used in radar target detection and imaging. Usually, each array element of phased array radar emits the same signal, and the beam direction control is realized by connecting a phase shifter at the output end of each array element, and the beam space can be realized by adjusting the phase shift amount of the phase shifter. scanning. However, in each snapshot of phased array radar, the beam pointing is constant on all range resolution units, that is to say, the beam pointing has nothing to do with the distance, so the linear phased array radar cannot be used to achieve target range and azimuth angle The two-dimensional joint estimate of . However, in some applications, it is often expected that the array...

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Application Information

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IPC IPC(8): G01S13/06
Inventor 王文钦邵怀宗王永兵杨帆潘晔胡全
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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