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Angle-measuring and identifying method for target and bait interferences in main lobe of monopulse radar

A single-pulse radar and single-pulse angle measurement technology, which is applied to radio wave measurement systems, instruments, etc., can solve the problems of low accuracy and no way to identify the correct target

Active Publication Date: 2016-07-20
UNIT 63892 OF PLA
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Problems solved by technology

However, these methods need to greatly improve the radar structure, or use multiple pulses to achieve the detection of interference, and the accuracy is not high, and even if the interference is detected in multiple pulse periods, there is no way to identify the correct target, so as to maintain effective angle tracking

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  • Angle-measuring and identifying method for target and bait interferences in main lobe of monopulse radar
  • Angle-measuring and identifying method for target and bait interferences in main lobe of monopulse radar
  • Angle-measuring and identifying method for target and bait interferences in main lobe of monopulse radar

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the drawings and specific implementation.

[0062] figure 1 A schematic diagram of a conventional monopulse radar antenna. The monopulse radar antenna is composed of four antenna beams, covering the azimuth and elevation areas, and the arrangement is shown in the figure. Four antenna units transmit and receive echo signals simultaneously, which can achieve target orientation in two planes, azimuth and elevation.

[0063] figure 2 It is a structure diagram of the receiving front end of a conventional monopulse radar antenna. There are four antenna units and receiving channels to receive echo signals at the same time. In single-pulse angle measurement, a bridge circuit is usually used to form three received signals from four channels, Σ signal (sum signal), Δ E Signal (pitch difference signal) and Δ A Signal (azimuth difference signal). And the Δ obtained by the diagonal difference channel Δ The sign...

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Abstract

The invention relates to the technical field of radar signal processing and discloses an angle-measuring and identifying method for target and bait interferences in a main lobe of monopulse radar. The method comprises the following steps: with an improved radar receiver, extracting an echo signal of an opposite angle difference channel and judging if bait interference exists; with single target angle measurement and single pulse angle measurement for target and bait, identifying true and false target angles; and controlling an angle tracking gate of the monopulse radar according to the angle measurement output of a true target. According to the angle-measuring and identifying method provided by the invention, the receiver is used for extracting a double-difference signal and processing the signal, so as to realize the angle position estimation for two undistinguishable targets, complete bait interference detection and true target identification, increase the interference detection and identification accuracy and calculation efficiency and enhance the instantaneity of interference detection. The angle-measuring and identifying method provided by the invention has important practical significance in increasing the angle distinguishing capability of monopulse radar and improving existing target indication radar and tracking guidance radar and terminal guidance radar.

Description

Technical field [0001] The invention relates to the technical field of radar signal processing, in particular to an angle measurement and identification method for monopulse radar to interfere with targets and decoys in the main lobe. Background technique [0002] Monopulse radar angle measurement is a relatively mature technology and is widely used in high-precision radar angle measurement systems. However, the angle deception interference of two point sources with similar angles has brought a serious threat to the monopulse angle measurement system. When there are two targets in the main lobe of the antenna, the output of conventional single-pulse angle measurement is the weighted average of the two target angles in physical space, which cannot give a correct angle indication. The angle measurement values ​​of the two targets are synthesized and confused into one. It is unable to distinguish the angle, thereby destroying the radar angle tracking system. [0003] Active radar dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41G01S7/414
Inventor 戴幻尧王建路周波乔会东张杨崔建岭张晓芬赵琳锋
Owner UNIT 63892 OF PLA
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