A Method for Stable Tracking of Ground Moving and Static Targets by Airborne Radar

Abstract

The invention relates to a stable ground moving / static target tracking method for airborne radar. According to the method, nonlinear frequency-modulated and stepped-frequency signals are simultaneously emitted to respectively detect moving / static targets according to the characteristics of the moving / static targets; the nonlinear frequency-modulated signals are mainly used for detecting the moving targets, and the stepped-frequency signals are mainly used for detecting the static targets; one-time point trajectories of the moving / static targets on the ground can be simultaneously obtained in one scan frame of the radar. Compared with the traditional methods, the method has the advantages that the moving / static targets on the ground can be noticed simultaneously, the overall situation of the targets on the ground is reflected, continuous tracking can be carried out when the targets become static from moving or become moving from static, and the continuity and stability of tracking of the moving / static targets on the ground are guaranteed.

Description

Technical field [0001] The invention belongs to a surface target data processing method, belonging to the technical field of radar signal detection and data processing, and specifically relates to a method for stable tracking of airborne radar ground moving and static targets. Background technique [0002] Compared with traditional air-to-air radar, airborne radar's multi-target tracking on the ground is obviously different, and the technology is difficult. First, there is relative motion between the airborne radar platform and the target. Target tracking is not only related to the motion state of the target, but also related to the motion state of the carrier itself; secondly, since the tracking target is a ground target, there is strong ground clutter The background makes it difficult for radars to detect targets. Finally, due to the simultaneous existence of stationary and moving targets, mobile targets and non-mobile targets on the ground, the difficulty of stable target trac...

AI Technical Summary

Problems solved by technology

[0006] (4) Sensor detection probability: Due to terrain occlusion, the sensor may not be able to observe the ground target. In addition, the ground moving target indicator (GMTI) has a minimum detectable radial velocity (MDV), and the sensor cannot detect when the target is stationary or moving at a low speed , so the detection of the sensor may be discontinuous

[0007] (5) Clutter: The ground target moves in an environment with severe clutter. The current clutter suppression processing cannot achieve a close to ideal suppression effect. The existence of clutter will lead to a decrease in detection probability and an increase in the number of false alarms

The traditional data processing method is limited by the processing level and technical conditions. Usually, the moving target and the static target are processed separately. This method cannot fully reflect the overall situation of the ground target, especially when the target moves from dynamic to static or from static to dynamic. will cause the target to be lost

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