Track tracking optimization method under radar far-near alternative ranging mode

Abstract

The invention relates to a track tracking optimization method under a radar far-near alternative ranging mode. The method comprises the following steps of alternately acquiring the trace points of a target through a long ranging mode and a near ranging mode; determining the track start of the target through the continuity of continuously acquired multi-frame track points; screening the track points acquired by the long ranging mode and the near ranging mode by adopting gates with different parameters to determine the track points matched with the flight track; and updating the track points matched with the flight tracks into the flight tracks through different nonlinear filter noise matrixes set according to different distance measuring modes for obtaining the point tracks, thereby obtaining new flight tracks. Through the method disclosed by the invention, the matching continuity of track points and flight tracks is improved by adopting the self-adaptive sector wave gate for matching,and the flight tracks are optimized by arranging different nonlinear filter noise matrixes through different ranging modes for acquiring track points, thereby improving the filtering smoothing effectof the flight tracks and the estimation precision of the motion state of the detected target.

Description

Technical field [0001] The invention relates to the technical field of radars, in particular to a method for tracking and optimizing a track in a radar distance alternate range measurement mode. Background technique [0002] The vehicle-mounted radar sets up the corresponding frame structure and transmitting antenna according to different ranging requirements, resulting in the short-range measurement mode (hereinafter referred to as the "near mode") and the long ranging mode (hereinafter referred to as the "far mode"). The difference, for example, the measurement accuracy of the radial distance of the short-mode target is higher than that of the far mode, and the measurement accuracy of the short-mode target angle is lower than that of the far mode. Therefore, when a single near system is used for track tracking, it is easy to lose track information at a long distance (such as beyond 120m), resulting in the failure of the matching of the point track and the track; (For example, ...

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Problems solved by technology

[0002] Vehicle-mounted radars set corresponding frame structures and transmitting antennas according to different ranging requirements, resulting in the measurement accuracy of point traces obtained in the near ranging mode (hereinafter referred to as 'near standard') and the far ranging mode (hereinafter referred to as 'far standard'). The difference is that the measurement accuracy of the radial distance of the near standard target is higher than that of the far standard, while the measurement accuracy of the near standard target angle is lower than that of the far standard

Therefore, when a single near system is used for track tracking, it is easy to lose point track information at a long distance (such as beyond 120m), resulting in failure to match the point track with the track; (For example, within 20m) the accuracy of the point track information is low, which leads to the wrong matching between the point track and the tr

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