Correlation method between radar and esm track based on topological information under systematic error

A track correlation and topology information technology, applied in the radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problems of unknowable correlation statistics threshold, wrong correlation and missing correlation, etc. Achieve the effects of improving the correct correlation rate, ensuring real-time performance, and suppressing influence

Active Publication Date: 2018-09-11
NAVAL AVIATION UNIV
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Problems solved by technology

Traditional radar and ESM track correlation methods usually assume that the error is Gaussian white noise with zero mean value. By constructing correlation statistics and then using statistical theory to judge, the existence of systematic errors is often ignored.
Since the system error is unknown, statistical methods cannot be used to obtain the threshold of correlation statistics, so it will lead to a large number of false correlations and missing correlations in practical applications, which cannot meet the requirements

Method used

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  • Correlation method between radar and esm track based on topological information under systematic error
  • Correlation method between radar and esm track based on topological information under systematic error
  • Correlation method between radar and esm track based on topological information under systematic error

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Embodiment Construction

[0014] The flow of the radar and ESM track correlation method based on topology information under system error is as follows: figure 1 Shown.

[0015] Assume that two remotely configured radars and ESM simultaneously detect targets in a two-dimensional Cartesian coordinate system, where the radar is located at the coordinate (x A ,y A ), ESM is at (x B ,y B ) Place. Suppose there are n targets in the detection area at time k, and the measurements of radar and ESM are simultaneously affected by random measurement errors and systematic errors. The systematic errors of radar ranging, angle measurement and ESM angle measurement are constant Δ r ,Δ θA And Δ θB . Random error of radar angle measurement, ranging and ESM angle measurement ε θA (k), ε r (k) and ε θB (k) Obey the mean value of 0, and the variances are respectively with Gaussian distribution.

[0016] Reference attached figure 1 , A method of radar and ESM track correlation based on topology information under systematic...

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Abstract

The invention discloses a radar and ESM (Electronic Support Measure) track correlation algorithm based on topology information under system error. For radar and ESM configured in different places, when the bearing lines intersect, a plurality of cross location points are produced, including wrong ghost points and correct correlated points. After all cross location points are obtained, partial correlation is performed first based on distance information, and a lot of impossible correlations are ruled out, so that the amount of calculation is reduced, and time is saved. Then, the remaining cross location points are divided and combined, the degree of correlation between each combination and radar measurement is calculated based on topology information, the cross location points in the combination corresponding to the highest degree of correlation are sequentially correlated with corresponding radar measurement, and thus, the correlation between all radar and ESM targets is obtained. Compared with the traditional track correlation algorithm, the topology information between targets is fully utilized, the influence of system error on track correlation can be well restrained, the rate of correct association is improved, and the rate of error correlation and the rate of missing correlation are reduced.

Description

Technical field [0001] The invention belongs to the field of track correlation of heterogeneous sensors, and provides a method for track correlation of radar and electronic support measurement (Electronic Support Measurement, ESM) based on topology information under the condition of system error. Background technique [0002] The information provided by similar sensors is single and susceptible to interference. With the increasingly complex battlefield environment, heterogeneous sensor systems are playing an increasingly important role. Radar and ESM are two typical and most widely used active and passive sensors. Radar can provide accurate location information, ESM can provide accurate attribute information, the combination of the two can more accurately and completely recognize the target, can solve the problem of who the target is and where the target is, which is useful for target threat estimation, early warning and Further operational command and decision-making are of vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/72
CPCG01S13/726
Inventor 关欣彭彬彬衣晓孙贵东
Owner NAVAL AVIATION UNIV
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