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Method for FDA-MIMO (Frequency Diverse Array-Multiple-Input and Multiple-Output) radar to suppress mainlobe deceptive interference

A flap deception type, radar technology, applied in the field of electrical communication, can solve the problem of not having universal applicability, can not solve the problem of dense false target interference suppression, etc., to achieve the effect of overcoming dense false target interference suppression and achieving the effect of suppression

Active Publication Date: 2018-09-28
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that it only considers the special case that the false targets generated by the same false target generator (FTG) have the same steering vector, and it is not universally applicable
However, this method cannot solve the problem of dense false target interference suppression by using the orthogonality between waveforms

Method used

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  • Method for FDA-MIMO (Frequency Diverse Array-Multiple-Input and Multiple-Output) radar to suppress mainlobe deceptive interference
  • Method for FDA-MIMO (Frequency Diverse Array-Multiple-Input and Multiple-Output) radar to suppress mainlobe deceptive interference
  • Method for FDA-MIMO (Frequency Diverse Array-Multiple-Input and Multiple-Output) radar to suppress mainlobe deceptive interference

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Embodiment Construction

[0045] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0046] Refer to attached figure 1 , the specific implementation steps of the present invention will be further described in detail.

[0047] Step 1. Construct frequency diversity array multiple-input multiple-output FDA-MIMO radar joint transmit-receive spatial frequency.

[0048] According to the following formula, according to the geometric structure of the radar array and the angle and distance of the target, considering the phase change relationship of the signal during propagation, the equivalent transmitter steering vector and Receiver Steering Vector:

[0049]

[0050]

[0051] Among them, a(R 0 ,θ 0 ) represents the equivalent transmitter steering vector of a frequency diversity array multiple-input multiple-output FDA-MIMO radar target, R 0 Indicates the distance of the target relative to the radar, θ 0 Repr...

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Abstract

The invention provides a method for an FDA-MIMO (Frequency Diverse Array-Multiple-Input and Multiple-Output) radar to suppress mainlobe deceptive interference. The invention mainly aims to solve a problem that an existing radar system has little possibility of suppressing deceptive interference from a mainlobe direction. The method includes the following steps that: 1, the joint transmission-receiving spatial frequency of the FDA-MIMO radar is constructed; 2, a transmission-receiving spatial frequency domain compensation vector is constructed to compensate a transmission spatial frequency domain; 3, a weight obtained according to the constraint conditions of a robust adaptive beamformer is solved; and 4, compensated matched filtered output signals are obtained. With the method of the invention adopted, the extra distance dimension controllable degree of freedom of a frequency diversity array (FDA) is fully utilized. The method can be used for suppressing mainlobe deceptive interference.

Description

technical field [0001] The invention belongs to the technical field of electric communication, and further relates to a frequency diversity array multiple-input multiple-output FDA (Frequency Diverse Array)-MIMO (Multiple-Input and Multiple-Output) radar for digital information transmission to suppress main lobe deceptive interference method. The invention can be used to suppress the deceptive interference from the main lobe direction of the radar antenna and improve the performance of the radar in electronic warfare. Background technique [0002] The battle between radar jamming and anti-jamming is becoming increasingly fierce and complex. Among them, deceptive jamming induces the radar system to treat false targets as real targets by radiating electromagnetic waves similar to target echoes, affecting its parameter estimation and tracking of real targets, and posing a huge threat to the radar's battlefield survivability. In fact, traditional radar lacks effective system d...

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Application Information

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IPC IPC(8): G01S7/36G01S7/02
CPCG01S7/023G01S7/36
Inventor 许京伟兰岚廖桂生张玉洪王寒冰
Owner XIDIAN UNIV
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