Secondary surveillance radar track extraction method for multimode polling and S-mold roll-calling interrogation

Abstract

The invention provides a secondary surveillance radar track extraction method for multimode polling and S-mold roll-calling interrogation. By using the method, false targets under an interference environment can be effectively removed and the accuracy and the real-time performance of the S-mode query are improved. The method is realized through the technical scheme that plot combination is conducted to S-mode plot data which is searched from the same sector of a secondary surveillance radar interrogator, the mean value and the variance of the plot data are calculated, and a real track is initiated after time-space registration; the combined plot data is divided according to the sector characteristic of radar and an associated sector window is created to enter a plot and track processing flow; firstly de-biased measurement conversion is conducted to the associated plot data, a CV (Constant Velocity) model, a CA (Constant Acceleration) model and a current statistical model are combined into a target multi-model, and the interactive input state estimation vector and the variance of each filter under an interactive effect are calculated; interference targets are removed by adopting interference target removing strategies; and unnecessary target files are removed through track management, tracking is ended and a correct target track extraction result of the secondary surveillance radar is given.

Description

technical field [0001] The invention relates to a target track recording method in the field of S mode secondary radar data processing. Background technique [0002] Mode S secondary radar is an advanced western system radar, which has been widely used in air traffic control and other fields because of its many advantages. Secondary Radar (SSR) is for primary radar. The secondary radar transmits a certain mode of interrogation signal from the ground interrogation radar, and the transponder installed on the aircraft receives this mode of inquiry. [0003] After asking the signal, after signal processing and decoding, the transponder sends back the coded reply signal. The ground radar receives the reply signal, and after signal processing and data processing, the aircraft code, altitude, altitude, etc. [0004] Information such as bearing and distance are shown on the display. Mode S secondary radar is an intelligent secondary surveillance radar to overcome the limitations ...

AI Technical Summary

Problems solved by technology

Trajectory data processing in traditional secondary radar 1, 2, 3 / A, C modes Commonly used algorithms for track association include: "Nearest Neighbor" method and "All Neighbor" method, "All Neighbor" method includes probabilistic data association (PDA) method and joint data association (JPDA), the nearest neighbor method includes the general nearest neighbor method (NN) and the global nearest neighbor method (GNN). Using these methods alone is easy to follow the target, it is difficult to remove false targets, and it is difficult to achieve Ideal track acquisition effect, common interference targets are difficult to remove, high maneuvering target tracking is lost and cannot be accurately interrogated, etc. There is no relevant report on the solution to the above-mentioned problems of S-mode secondary radar.

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