Iterative filtering method for tracking before multiframe detection

An iterative filtering and forward tracking technology, applied in radio wave measurement systems, instruments, etc., to solve problems such as inapplicability to short tracks, inability to estimate the true state of the target, and degradation of detection performance.

Active Publication Date: 2014-09-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, in order to ensure the requirements of detection performance and radar real-time display, these multi-frame pre-detection tracking processes can only obtain the short track of the target at a time
If too many frames are tracked before detection, a large number of random factors will be introduced, and the detection perform...

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  • Iterative filtering method for tracking before multiframe detection
  • Iterative filtering method for tracking before multiframe detection
  • Iterative filtering method for tracking before multiframe detection

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Embodiment Construction

[0055] Implementation steps such as figure 1 Shown:

[0056] Step 1. Initialize system parameters:

[0057] The initialization variables include: the total simulation time K=50; the number of tracking processing frames before one detection N=6; the target signal-to-noise ratio SNR=8dB; the threshold of tracking processing before detection V T =13.7329; elliptic wave gate threshold γ=16; the detection probabilities of the 1st, 2nd,..., N frames of tracking processing before multi-frame detection are 0.806, 0.892, 0.902, 0.890, 0.882, 0.830 respectively; radar scanning period T=1s ;Target state transition matrix F; Observation matrix H; Process noise covariance Q;

[0058] F = 1 T 0 0 0 1 0...

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Abstract

The invention provides an iterative filtering method for tracking before multiframe detection. A later target state can be estimated more precisely according to a short track obtained through tracking processing before detection, filtering processing is carried out on the target state, the precision of estimating the target state is improved, a target can be tracked in real time for a long time, and the complete track of the target is obtained. The target state is estimated iteratively, and overmuch memory space and the too large calculated amount are not introduced. According to the method, the precision of estimating the target state is improved, the target can be tracked in real time for a long time, the problem that missing inspection possibly happens to tracking before weak target detection with the low signal to noise ratio is effectively solved through track predication, and the continuity of the track is guaranteed.

Description

technical field [0001] The invention relates to radar data processing technology, in particular to the technical field of radar weak target tracking. Background technique [0002] The modern battlefield environment is becoming more and more complex, the reduction of target flying height and the increasing maturity of target stealth technology have challenged the detection performance of traditional radars. Improving the detection and tracking performance of radar for faint targets has become an extremely important issue, and has attracted more and more attention. [0003] Multi-frame tracking before detection technology is a technology for detecting and tracking weak targets in low signal-to-noise ratio environments. This technology uses multi-frame information for target detection at the same time, which improves the detection effect of weak targets. Different from traditional detection methods, pre-detection tracking does not announce the detection results in a single fra...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/41
Inventor 易伟刘睿李溯琪姜海超崔国龙孔令讲杨晓波翟玉强
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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