Four-channel millimeter wave digital sum-difference monopulse precision tracking system

Abstract

The invention provides a four-channel millimeter wave digital sum-difference monopulse precision tracking system, and aims to provide an anti-interference monopulse tracking system capable of quicklyintercepting and precisely tracking. The system is realized through the following technical scheme that four paths of superheterodyne linear receivers obtain the intermediate frequency echo signals; the intermediate frequency digital sum-difference operation is completed through a signal processing module to form a sum, azimuth difference and pitch difference branch of three-channel monopulse sum-difference for realizing target detection, interception and distance closed-loop tracking, and the obtained distance, an angle error and the speed information of a target is sent to a digital stable tracking servo system and the data processing module,the digital stable tracking servo system realizes the angle closed-loop tracking of the target by utilizing the target distance and the angle errorinformation, acquires the target angle information in real time and sends the target angle information to the data processing module and the signal processing module, and the data processing module performs fusion and filtering processing on the received target distance, real-time angle, angular error and speed information to obtain the real-time high-precision parameters of the target.

Description

technical field [0001] The invention relates to a four-channel millimeter-wave digital sum-difference single-pulse precision tracking system. Background technique [0002] With the emergence of a wide variety of aircraft, missiles, and precision-guided bomb targets, medium-precision tracking radars gradually cannot meet the tracking and measurement requirements of weapon systems, thus giving birth to precision tracking radars that were born in the 1950s. Typical precision tracking measurement radars use monopulse technology. Monopulse radars can simultaneously provide all the beams required to be sensitive to angular errors, and compare the outputs of each beam simultaneously on a single radar pulse, thereby eliminating the need for scanning and beam switching techniques. The unavoidable effect of echo amplitude variation over time. Monopulse is a radar angle measurement technology, also known as simultaneous multi-beam technology, which was first proposed to overcome the l...

AI Technical Summary

Problems solved by technology

The angle tracking accuracy of the monopulse radar is much higher, and the cone scan radar can obtain the angle error information after at least one cone scan cycle, during which the target amplitude fluctuation noise is also superimposed on the cone scan modulation signal (angle error signal) Interference is formed, and the bandwidth of the automatic gain control circuit cannot be too wide, so the influence of the target amplitude fluctuation noise cannot be eliminated. The amplitude fluctuation noise within a certain bandwidth near the cone sweep frequency can enter the angle tracking system and cause angle measurement errors

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