High-frequency ground wave radar weak target accumulation detection method and computing device

Abstract

The invention provides a high-frequency ground wave radar weak target accumulation detection method and computing equipment, and the method comprises the steps: obtaining an echo signal of a high-frequency ground wave radar, and carrying out the pulse compression of the echo signal to obtain a high-frequency ground wave radar pulse pressure signal; setting search parameters of three-dimensional combined search of radial distance, radial speed and real speed according to the parameters of the high-frequency ground wave radar; performing target track signal extraction of the high-frequency ground wave radar according to the search parameters; constructing a phase compensation function along the slow time dimension of the high-frequency ground wave radar; compensating phase fluctuation of the extracted target track signal among pulses along a high-frequency ground wave radar pulse sequence, and adding echo envelopes of the compensated target track signal in the same phase to complete coherent accumulation; performing three-dimensional joint constant false alarm rate detection based on a coherent accumulation result, and judging whether a target is detected or not; and performing parameter estimation on the detected target, and outputting the parameter. According to the invention, the detection performance of the high-frequency ground wave radar on a high-speed and high-maneuverability weak target can be improved.

Description

technical field [0001] The present invention relates to the technical field of target detection, and in particular, to a high-frequency ground wave radar weak target accumulation detection method, a computing device and a computer-readable storage medium. Background technique [0002] High Frequency Surface Wave Radar uses the diffraction effect of long electromagnetic waves on the earth's surface (including the sea surface) to propagate electromagnetic waves along the earth's surface. Based on the characteristics of low propagation loss of high-frequency vertically polarized electromagnetic waves along the super-horizontal line on the surface, high-frequency ground wave radar can detect targets such as ships, aircraft, and missiles beyond the horizon, and the operating distance is approximately 300-400km. Therefore, high-frequency ground wave radar It can fill the blind spots that cannot be detected by microwave line-of-sight radar and sky-wave over-the-horizon radar. In a...

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Problems solved by technology

[0003] Although the high-frequency ground wave radar can implement all-weather continuous surveillance within its range of action, timely discover sea ships and air moving targets within its range of action, measure the distance, azimuth and radial velocity of the target, and process the track of the target, giving However, only based on the distance, azimuth and radial velocity of the sea surface ship and the air moving target, the target attributes cannot be correctly divided

When the angle between the moving direction of the target and the direction of the radar line of sight is very large, there is a large gap between the real moving speed of the target and the radial speed. Therefore, it is necessary to obtain the real speed of the target through technical means, and the current conventional radar calculation methods cannot correctly obtain the high-frequency ground wave radar monitoring target real speed

[0004] In addition, with the continuous emergence of various high-speed and high-mobility targets, such as hypersonic drones, high-altitude hypersonic cruise missiles, ballistic missiles, and high-mobility aircraft in space, especially weak targets moving at high speeds, high-frequency ground wave The echo signal that radar can receive is extremely weak, and the Signal to Noise Ratio (SNR) is extremely low. The existing high-frequency ground wave radar pulse accumulation method has encountered great challenges, and it is difficult to obtain accurate measurement results

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