Air target quick capturing method of monopulse radar

Abstract

The invention provides an air target quick capturing method of monopulse radar. By means of the method, a target searching and capturing capability of the radar can be remarkably improved on conditions of low signal-to-noise ratio and high-speed target movement, thereby realizing quick target capturing. The air target quick capturing method is realized through a technical solution which is characterized in that DSP embedded software is composed of a three-channel constant false-alarm rate detecting module, a wave beam direction adjusting module, a target parameter estimating module, a sequence position correlation module and a slide window accumulation confirmation module, wherein the method comprises the steps of inputting summation, direction difference and pitch difference three-channel distance images, performing constant false-alarm rate determination on the three-channel distance images, thereby obtaining a target signal with a highest amplitude; then changing elapse main triggering time, and adjusting the wave beam according to a designed strategy; performing target parameter estimation by means of a phase and a difference type monopulse measured angle; determining a fact that target correlation successes or fails by means of sequence position correlation; performing sliding window type accumulation on the correlation result, determining the accumulation result, and outputting the target information which is successively captured through the monopulse radar.

Description

technical field [0001] The invention relates to the field of radar target search and capture, in particular to a fast and accurate capture method for a high-speed moving target in the air by a monopulse radar with a low signal-to-noise ratio. Background technique [0002] In the air search and tracking radar, it is necessary to search for the designated airspace target before implementing the tracking guidance, and the fast and reliable target acquisition is the first prerequisite for the precise target strike. Most search and track radars use monopulse technology to achieve precise measurement and tracking of targets. Monopulse is a radar angle measurement technology. Accurate target angle information is obtained by comparing and difference channel signals. Theoretically speaking, an echo pulse is received to form an angle estimate of the target relative to the radar. The radar using this technology is called monopulse. pulse radar. [0003] In order to obtain high angle ...

AI Technical Summary

Problems solved by technology

Method (1) often uses increasing transmit power, increasing antenna and channel gain, and reducing receiver noise. It will be limited by many practical conditions, and it is difficult to use in engineering; method (2) improves the output signal-to-noise ratio by coherent and non-coherent accumulation of multiple time series pulses in signal processing, but requires the accumulation time target It is not possible to walk across distance units, which limits the accumulation time of high-speed moving targets in the air, and it is not suitable for long-term accumulation; in addition, most of the above methods only consider the detection of the sum channel, ignoring the information of the poor channel, and may lose the targets appearing in the poor channel. lose its capture

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