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Frequency diversity array deception jamming suppression method based on auxiliary array element

A frequency diversity array, deception jamming technology, applied in climate sustainability, instrumentation, ICT adaptation, etc., can solve the problems of weak anti-suppressive jamming ability, inability to overcome the influence of radar, difficult design of transmit waveforms, etc. The effect of false target interference and improving the ability to resist false targets

Active Publication Date: 2018-11-30
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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Problems solved by technology

[0003] At present, the commonly used anti-jamming technologies are: side lobe concealment technology can eliminate the transponder spoofing interference entered by the side lobe, but it cannot overcome the influence of the main lobe transponder interference on the radar
Pulse diversity technology can effectively suppress the main lobe repeating spoofing interference, but the design of the transmission waveform is difficult and the ability to resist suppressing interference is weak

Method used

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  • Frequency diversity array deception jamming suppression method based on auxiliary array element
  • Frequency diversity array deception jamming suppression method based on auxiliary array element
  • Frequency diversity array deception jamming suppression method based on auxiliary array element

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Embodiment Construction

[0036] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0037] Step 1: In the first PRI, the conventional radar system is used to perform matched filter ranging and single-pulse angle measurement on the received echo to obtain the distance and azimuth of M targets as (r i ,θ i ), i=1,2,...M,.

[0038] Step 2, in the second PRI, such as figure 2 As shown, the frequency diversity radar transmission and reception system is adopted, and the frequency diversity array radar antenna is a uniform linear array composed of N array elements, of which the first N-1 array elements form the main antenna, and the Nth array element is the auxiliary antenna. Select the first array element as the reference array element, and set the transmit signal frequency of the reference array element as peak f 0 , the frequency step of the frequency diversity array is △f. The specific steps are:

[0039] Set the launch coefficient of the main array, an...

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Abstract

The invention discloses a frequency diversity array deception jamming suppression method based on an auxiliary array element. Main lobe deception jamming is mainly suppressed. The frequency diversityarray deception jamming suppression method comprises the specific steps that conventional radar emission and receiving systems are adopted, all targets of the airspace at the moment are obtained; switching is conducted into a frequency diversity mode, main array emission coefficients are set, and the echo amplitude phase characteristics of a main array emitting antenna are calculated; according tothe main array emission coefficients, auxiliary array element coefficients are adjusted, and a zero point is constructed in a directional diagram at the specified target; echoes of emission frequencydiversity signals of the main array coefficients and the auxiliary array coefficients are subjected to matching filtering; and a threshold value is set, if the echo matching filter power at the specified target position is larger than the threshold value, it is judged to be a false target, if the echo power at the specified target position is smaller than the threshold value and the echo power atother positions is suddenly decreased, it is judged to be a jammer, and if only the echo matching filter power at the position is smaller than the threshold value, it is judged to be the false target.

Description

technical field [0001] The invention belongs to the technical field of radar interference suppression. Background technique [0002] In the field of electronic warfare in modern military confrontation, electronic warfare and anti-countermeasure technologies have always occupied a dominant position. Radar electronic countermeasures refer to preventing the enemy's electronic countermeasures from affecting and destroying one's own radar system, and at the same time avoiding the adverse effects of the countermeasures adopted by one's own side on the combat effectiveness of one's own radar. Digital radio frequency memory can generate repeating interference similar to radar signals, including distance deception interference, speed deception interference and angle deception interference, etc., causing false alarms, reducing the radar's ability to detect real targets, and even causing radar tracking saturation, reducing radar combat capability. [0003] At present, the commonly us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36G01S7/02
CPCG01S7/021G01S7/023G01S7/36Y02A90/10
Inventor 袁越涂刚毅陆翔丁世谱吴少鹏
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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