Multi-frame detection pre-tracking method of airborne early warning radar based on minimum covered airspace

Abstract

The invention discloses a multi-frame detection pre-tracking method of an airborne early warning radar based on a minimum covered airspace, which can be used to solve a problem of difficult implementation of a detection pre-tracking algorithm based on dynamic planning generated by an unaligned measured airspace grid caused by the movement of a radar platform. The method is characterized by discretizing an entire state space through using a measurement grid alignment discretization method; then, using a coordinate system change method to determine a mapping relationship between measurement anda state; and then traversing a maximum mapping result of each dimension to compress the size of a covered airspace, and then completing accumulated data preparation of a corresponding minimum coverageairspace dimension according to the mapping relationship; and finally, completing detection and tracking of a target by using a detection pre-tracking algorithm. By using the method of the invention,an original position of a measurement point trace is reserved as much as possible, and the size of a search airspace is compressed under a condition that most of the measurement point traces are reserved so that a computational burden of the algorithm is small while tracking accuracy is ensured.

Description

technical field [0001] The invention belongs to the field of radar target detection, in particular to a multi-frame detection-before-tracking technology for weak targets by an airborne early warning radar. Background technique [0002] Placing the early warning radar on an airborne platform that can move flexibly in the air has very important military significance: a) The launch of the radar greatly reduces the influence of the curvature of the earth and terrain occlusion, so that the detection blind area of ​​the early warning radar is significantly reduced; b ) The movement of the carrier aircraft enables the radar surveillance area to change flexibly, providing the possibility of completing various surveillance tasks; c) The mobility of the carrier aircraft ensures that the radar has a strong survivability in combat missions. Therefore, moving ground-based and ship-borne early warning radars to launch platforms such as airplanes and balloons is an inevitable choice for re...

AI Technical Summary

Problems solved by technology

Both literatures did not consider the impact of carrier movement

[0004] In the published patent "A Method for Tracking Before Detection of Airborne Radar Weak Targets Based on Coordinate Calibration" (publication number: CN108983216A), the tracking before detection algorithm used is another implementation method of the DP-TBD algorithm. The method screens the original echo data with the goal of reducing the calculation amount of the algorithm, so that the data input to the tracker is the position information of the echo point. Although the problem of grid misalignment in the measurement space can be avoided, it is undoubtedly better than the original algorithm. loss of performance

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