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A Tracking-before-Detection Method for Radar Targets Based on Trajectory Enhancement

A radar target and forward tracking technology, which is used in measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation. effect, smooth noise effect, small fluctuation of target state

Inactive Publication Date: 2017-03-08
XIDIAN UNIV
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Problems solved by technology

Using the histogram distribution to model the observation data, this method does not need to calculate the observation likelihood function, and the computational complexity is lower than the recursive Bayesian method, but the algorithm is easily disturbed by clutter

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  • A Tracking-before-Detection Method for Radar Targets Based on Trajectory Enhancement
  • A Tracking-before-Detection Method for Radar Targets Based on Trajectory Enhancement
  • A Tracking-before-Detection Method for Radar Targets Based on Trajectory Enhancement

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[0035] The pre-detection tracking method does not perform threshold discrimination, and there is no information loss. Through the incoherent accumulation of multi-frame data, the detection-tracking processing operation can be performed under the condition of low signal-to-noise ratio. However, the TBD recursive algorithm has a relatively high computational complexity; and the TBD batch processing method does not introduce tracking ideas, and there is a lack of research on how to make full use of the TBD results for tracking after obtaining a new frame of data. In order to introduce the idea of ​​tracking to realize integrated detection and tracking processing, the method of the present invention is proposed.

[0036] Suppose that in the k-th frame of measurement data during radar scanning and tracking, the slope distance of the target is r k , The azimuth angle of the target is α k , The pitch angle of the target is β k , The Doppler frequency of the target is f d, k , The target...

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Abstract

The invention belongs to the technical field of radar moving target tracking and particularly relates to a before-radar-target-detecting tracking method based on track enhancing. According to the tracking process, first, for multi-frame original data, non-parametric track initial batch processing operation is carried out, and a target trace point set is obtained; then according to target track state parameters updated in real time and errors in measurement, a corresponding parameterization track enhancing operator is designed; and finally current measuration is combined, and a parameterization track enhancing method is used for carrying out prediction tracking. The method is characterized in that closed loop feedback is achieved, during track enhancing operation, multi-frame measuration and states can be fully used, detecting tracking accuracy and precision can be improved, the method has the advantage that under the condition of the low signal-to-noise ratio, detecting and tracking integration processing can be achieved, and the method can be used in the field where monitoring systems such as radar are used for detecting and tracking a long-distance highly-maneuvering target with weak echo signals.

Description

Technical field [0001] The invention belongs to the technical field of radar moving target tracking, and particularly relates to a tracking method before detection of radar targets based on trajectory enhancement. The invention is a method for stable tracking of high maneuvering targets under low signal-to-noise ratio conditions, and can be used for radars The monitoring system integrates the detection and tracking of long-distance and weak echo signals. Background technique [0002] In modern warfare under the high-tech background, continuous monitoring of the battlefield can provide rich strategic and tactical information for situation assessment, command and other applications, and play a key role in winning the war. Radar has always been the core of the battlefield surveillance system for its all-time and all-weather work characteristics. [0003] Aiming at the detection and tracking problem in the case of low signal-to-noise ratio, in order to avoid target missed detection ca...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/72G01S13/58G01S7/41
CPCG01S7/41G01S13/72
Inventor 杨志伟廖桂生孙存光何嘉懿
Owner XIDIAN UNIV
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