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Multi-beam phased array difference sum ratio angle estimation method

An angle estimation and multi-beam technology, which is applied in the radio wave measurement system, the directional device for determining the direction, the reflection/reradiation of radio waves, etc., can solve the problems of insufficient angle estimation accuracy, and achieve high precision and strong direction finding tracking. Anti-jamming ability and flexible beam switching effect

Active Publication Date: 2021-06-15
10TH RES INST OF CETC
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Problems solved by technology

[0004] The problem to be solved by the present invention is: how to accurately represent the sub-beam pattern, and overcome the problem of insufficient accuracy of angle estimation caused by the above-mentioned errors

Method used

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Embodiment Construction

[0017] refer to figure 1. According to the present invention, a uniform linear array model of a phased array antenna whose array surface is a uniform linear array body is established by using a digital phased array system, and the digital phased array antenna is electronically scanned in the whole space, and the angle of the received echo signal is roughly captured to obtain The approximate angle of the echo signal, the echo signal is converted into an N×1-dimensional digital intermediate frequency signal vector direction x(n) through the receiving channel, and input to the digital signal processing DSP module, and the echo signal y received by the two beams 1 (n) and y 2 (n) Estimate the signal amplitude, and the obtained amplitudes are E 1 and E 2 The two echo signals of the two echo signals; adjust the phased array receiving weight vector in the DSP module, and then use the simultaneous multi-beam phased array difference and ratio angle estimation to complete the echo an...

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Abstract

A multi-band phased-array antenna rotation testing device disclosed by the invention is simple in structure, convenient to install and high in precision, and has an angle rotation control function. According to the technical scheme, a U-shaped cantilever support (1) is fixedly connected with the inner side of a radome of a tested antenna in a conformal mode according to the fact that the shape of the inner side of the radome is of a curved surface or a plane structure, and the U-shaped cantilever support is fixedly connected with a scale plate (3) and then fixedly connected with a shaft and a bearing in a bearing seat (4) to form a rotating cantilever connected with a rocking handle (5); and the scale plate is provided with a circular array indexing hole system and indexing scribed lines which are uniformly distributed around the circle center of the bearing at equal intervals, the rocking handle is rotated to drive the tested antenna body (8) to rotate and control the steering angle of the scale plate, a pointer (2) fixed at the top end of the bearing seat indicates the rotation angle of the tested antenna by using the tip, and a rotation angle locking function is achieved through an elastic indexing pin (6) installed on the lower side of the bearing seat. The method can be adapted to different darkroom rotary tables, and meets the installation requirements of various rotary tables.

Description

technical field [0001] The invention relates to communication, radar, measurement and control, etc., which require estimation of the direction of arrival of electromagnetic waves, and specifically relates to an angle estimation method under simultaneous multi-beam reception formed by using a digital phased array antenna. Background technique [0002] Monopulse, as a radar angle measurement technology, is mainly a radar technology that obtains point source or target angle information through signals of two or more simultaneous beams. At the same time, multiple beams make it possible to achieve two Dimensional angle estimation becomes possible. In tracking radars, monopulse technology enables precise tracking and measurement of targets. The multi-beam phased array antenna forms the sum and difference beams by weighting the sum and difference beams of the data received by the array elements. The sum-difference beamforming is generally based on the output end of the common bea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/32G01S13/72
CPCG01S3/32G01S13/723G01S2013/0245
Inventor 杨顺平任思蒋凯邵龙何海丹李秀梅
Owner 10TH RES INST OF CETC
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