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Array radar seeker monopulse angle measurement method in main lobe interference

A single-pulse angle measurement and main lobe interference technology, applied in the radar field, can solve the problems of loss of angle measurement accuracy, no longer accurate angle measurement, and no longer the same adaptive beam, achieving simple implementation, high angle measurement accuracy, and good Effect of Angle Measurement Accuracy

Active Publication Date: 2019-06-28
XIDIAN UNIV
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Problems solved by technology

In "Adaptive antenna system, Proceedings of the IEEE.1967", WIDROW.B et al. proposed an adaptive beamforming signal processing architecture based on the double-difference beam method, which can suppress the main lobe interference and complete the target detection. Monopulse angle estimation, however, the above method is only suitable for rectangular antenna arrays, and non-rectangular array models are often used for array radar seekers, and large errors will occur when using the above methods for angle measurement
For non-rectangular arrays, Chen Xinzhu and others proposed a double-difference beam method based on linear compensation technology in "Non-rectangular phased array anti-mainlobe interference and monopulse angle measurement technology, modern radar, 2016". By calculating the linear compensation coefficient and performing linear compensation on the sum beam and the double-difference beam, the adaptive output ratio is the same as the static monopulse ratio, but at the same time, the slope of the static monopulse ratio curve will decrease, so a certain angle measurement will be lost precision
[0004] In the presence of main lobe interference, the traditional double-difference beam method applied to a non-rectangular array model will cause the output ratio of the adaptive beam to be no longer the same as the static monopulse ratio , so the angle measurement is no longer accurate; and the linear compensation technology makes the adaptive output ratio the same as the static single pulse ratio through the linear compensation method, but it will cause the slope of the static single pulse ratio to decrease, thereby losing a certain angle measurement accuracy. Therefore, When the existing method is applied to the non-rectangular array model of the array seeker, it cannot meet the requirements of accurate angle measurement while suppressing interference

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Embodiment 1

[0028] When the interference comes from the main lobe area of ​​the antenna, for the rectangular array model, the four-channel beamforming technology is generally used, and the double-difference beam is used to adaptively suppress the main lobe interference, and then the target angle is estimated using the monopulse lookup table. However, the non-rectangular array model is often used for the array seeker. After applying the above technology, the output ratio of the adaptive beam is no longer the same as the static monopulse ratio, so the angle measurement is no longer accurate. For the non-rectangular array model, the existing linear compensation technology calculates the linear compensation coefficient and performs linear compensation on the sum beam and the double-difference beam, so that the adaptive output ratio is the same as the static monopulse ratio, but at the same time it will cause the static monopulse ratio The slope of the curve decreases, so certain angle measurem...

Embodiment 2

[0042] A kind of array radar seeker monopulse angle measuring method under the interference of a kind of main lobe is the same as embodiment 1, and the data reception described in step (1) comprises the following steps:

[0043] (1a) Refer to figure 1 with figure 2 , figure 1 is the element-level model of the array seeker applied in the present invention, figure 2 is the array seeker sub-array model applied in the present invention. The present invention is specially aimed at this kind of non-rectangular array model. Firstly, according to the array element-level receiving data of the non-rectangular array model, dimensionality reduction processing is performed, and the array element-level receiving data is set to X, and X∈C 432×1 , for the 12-sub-array division method of the array seeker, if the sub-array conversion matrix is ​​required, first fill in the missing four corners of the 12-sub-array to make it a regular 16-sub-array model. Therefore, this mode Next, the suba...

Embodiment 3

[0060] The array radar seeker monopulse angle measuring method under a kind of main lobe interference is the same as embodiment 1-2, and in step (2) carries out data selection and non-adaptive beamforming according to non-rectangular array model, comprises the following steps:

[0061] (2a) Beam scanning and beam Σ are directly performed from the received data of the sum channel:

[0062]

[0063] Among them, W Σ is the weight of generating sum beam Σ, and W∈C 12×1 , is the steering vector array, and

[0064] (2b) Design the pitch dimension selection matrix A1 and the azimuth dimension selection matrix A2 respectively. And the pitch dimension data selection matrix A1 and the azimuth dimension data selection matrix A2 are respectively expressed as follows:

[0065]

[0066] (2c) When measuring the pitch dimension angle of the target, select the pitch difference channel, azimuth difference channel and double difference channel data according to the pitch dimension s...

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Abstract

The invention discloses an array radar seeker monopulse angle measurement method in main lobe interference, and aims at solving the problem that a present method cannot accurately measure the angle ofa radar seeker non-rectangular array plane in the main lobe interference environment. The method is realized by that reception data of an array antenna is received in a dimension reduction way; different selective matrixes are designed to process the reception data of a difference channel, and non-adaptive wave beam formation is carried out to generate different difference beams; a linear compensation coefficient is calculated, a monopulse look-up table is adjusted linearly, and the difference beams are compensated linearly; the wave beams generate resistance to the main lobe interference adaptively; and the target angle is measured. The selective matrixes are designed, the linear compensation relation is constructed, the target angle is measured in high precision, an estimation performance is higher than that of the method in the prior art, realization is simple, and the engineering value is high. The method can be used to monopulse angle measurement for the array seeker in the mainlobe interference environment.

Description

technical field [0001] The invention belongs to the technical field of radar and relates to single-pulse angle measurement of a seeker, in particular to a method for single-pulse angle measurement of an array radar seeker under main-lobe interference, which can be used for missile-borne array radar seekers under main-lobe interference The angle estimate of the target in the environment. Background technique [0002] With the rapid development of electronic countermeasure technology, the missile weapon system is facing an increasingly complex electronic interference environment, so the seeker is required to have stronger anti-interference ability. The multi-channel phased array radar seeker adopts multi-channel reception and array signal processing technology, which not only expands the anti-jamming ability of the radar seeker, but also significantly improves the target detection ability, and has become a hot spot of the current precision guidance radar seeker research direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S7/02
Inventor 谢荣刘晓冉刘峥冉磊王珊珊
Owner XIDIAN UNIV
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