Fast high maneuvering target accumulating and detecting method based on cross-correlation functions

Abstract

The invention provides a fast high maneuvering target accumulating and detecting method based on cross-correlation functions, belongs to the technical field of radar, and relates to a target detecting method. The method can be used for efficiently processing radar detection based on multiple phase-coherence pulse echoes in a white Gaussian noise environment. At first, the cross-correlation functions of adjacent pulses of echo signals are utilized for correcting the distance movement of a target, cross-correlation operation for the second time is used for correcting the Doppler movement of the target, and finally Flourier transformation (FFT) is used for achieving effective accumulation of target energy. As all kinds of operation can be achieved by utilizing the fast Fourier transformation, the operation amount of the detecting method is greatly reduced, phase-coherence accumulation of the variable accelerated target energy can be achieved fast, the fast detection ability of the radar to the high-speed maneuvering target can be effectively improved, and the method is beneficial for engineering realization.

Description

technical field [0001] The invention belongs to the technical field of radar and relates to a target detection method, which can be used for efficient processing of radar detection based on multiple coherent pulse echoes in a Gaussian white noise environment. Background technique [0002] With the development of science and technology, especially the continuous development of aviation technology and high-speed targets, more and more maneuvering targets appear in the field of radar signal detection. For example, a hyperspeed vehicle in close space can fly at a speed as high as Mach 25, and can move with variable acceleration, which is extremely maneuverable; there are also targets such as ballistic missiles, which can be used for snake-like maneuvering penetration. On the other hand, the increasing maturity of stealth technology has sharply reduced the radar reflection cross-sectional area of ​​maneuvering targets such as space vehicles, resulting in very weak radar echoes an...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a fast accumulation detection method for high-mobility targets based on cross-correlation functions to solve the problem of rapid accumulation detection of high-speed targets with variable acceleration. The method does not require any interpolation or search operations, thereby It achieves the purpose of small amount of calculation, easy engineering implementation, and is conducive to improving the real-time detection performance of radar for high-speed maneuvering targets

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