Dynamic programming track before detect method for moving platform radar based on motion compensation search

Abstract

The invention discloses a dynamic programming track before detect method for moving platform radar based on motion compensation search, is applied to the field of radar target detection, and aims at solving the problem of difficult determination of discrete state space caused by mismatch of measurement grids under the moving platform. Firstly a time-varying measurement gridding method is utilizedto discretize the whole state space, then the position of the state cell in the absolute geodetic coordinate system is calculated by the method of coordinate system change, then the possible positionof the last frame is speculated according to the search speed and finally the effective state space range of the search is calculated according to the motion compensation so as to complete the value function accumulation process in the dynamic programming track before detect algorithm under the moving platform. The dynamic programming track before detect algorithm is enabled to be adaptive to themoving platform radar by the scheme under the condition of low calculation amount and high tracking accuracy, and the detection and tracking performance of the radar for weak targets can be greatly enhanced.

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 a moving platform radar. Background technique [0002] Compared with ground-based radar, airborne mobile platform radar has many advantages in modern military warfare because of its advantages in platform height and maneuverability. On the one hand, the elevation of the radar reduces the influence of the curvature of the earth and terrain occlusion, making the radar's surveillance area wider; on the other hand, placing the radar on an aircraft that can move flexibly can improve the survival rate of the radar in combat. Today, the early warning aircraft has become an important symbol of military informatization, the nerve center of the entire combat system of modern warfare, and has broad development prospects. [0003] The current radar target detection technology is facing severe challenges. For exampl...

AI Technical Summary

Problems solved by technology

On the one hand, because the entire state space is discretized with the same standard, and the measurement space at different times has different discretization standards, the position of the trace is no longer accurate due to the second discretization, and may cause different measurement The cells are mapped in the unified state cells, which leads to the problem of insufficient utilization of measurement information; on the other hand, although the state space selected by the algorithm covers all measurement airspaces and reduces the size of the airspace as much as possible, it still covers Some airspaces without measurement data, the value function update operation in this airspace can be regarded as redundant calculation

Images