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A Constant False Alarm Detection Method for Moving Targets Based on Waveform Contrast Optimal Algorithm

A technology of constant false alarm detection and optimal algorithm, applied in the field of terahertz radar target detection, to achieve the effect of good motion compensation and excellent detection performance

Active Publication Date: 2020-10-09
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

Therefore, these algorithms are not suitable for the fast-moving terahertz high-resolution fuze target detection problem, and the research on the fast-moving extended target detection is very necessary

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  • A Constant False Alarm Detection Method for Moving Targets Based on Waveform Contrast Optimal Algorithm
  • A Constant False Alarm Detection Method for Moving Targets Based on Waveform Contrast Optimal Algorithm
  • A Constant False Alarm Detection Method for Moving Targets Based on Waveform Contrast Optimal Algorithm

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Embodiment Construction

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0031] refer to Figure 1-Figure 5 , a constant false alarm detection method for moving targets based on the waveform contrast optimal algorithm,

[0032] The key to terahertz fuze target detection is motion compensation, in which the estimation accuracy of motion parameters determines whether the High Resolution Range Profiles (HRRP) can be optimally focused. The waveform contrast function is defined as the ratio of the standard deviation of the waveform intensity to the average value, denoted as

[0033]

[0034] where Y represents the HRRP amplitude of the received echo signal, α is the estimated value of the phase error coefficient, rep...

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Abstract

The invention discloses a moving target constant false alarm detection method based on a waveform contrast ratio optimal algorithm. The method comprises steps of allowing a waveform contrast ratio to become optimal according to an obtained echo signal high-resolution distance image by adjusting a compensation parameter to obtain a high-resolution distance image after movement compensation; giving a false alarm probability and acquiring a detection threshold; and according to the comparison of the high-resolution distance image after the compensation and the threshold, judging whether a target exists. Compared with the prior art, the method is characterized by capability of remarkably improving target detection performance of a Terahertz fuse.

Description

technical field [0001] The invention belongs to the technical field of terahertz radar target detection, and in particular relates to a constant false alarm detection method for moving targets based on an optimal algorithm of waveform contrast. Background technique [0002] The terahertz (THz) high-resolution fuze obtains extremely high resolution by emitting broadband waveform signals, thereby obtaining more target information. However, since the scattering center of the target diffuses into multiple range units, it also brings difficulties to the detection of the target while obtaining high resolution. Targets such as tanks and airplanes can no longer be considered as point targets at this time, but should be defined is an extended area target t composed of multiple scatterers in different radar range cells. Therefore, for the terahertz high-resolution radar system, the detection method of the conventional low-resolution radar point target can no longer be directly used f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89G01S13/04G01S7/41
CPCG01S7/41G01S13/04G01S13/89
Inventor 李家强李昭陈金立
Owner NANJING UNIV OF INFORMATION SCI & TECH
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