Moving target constant false alarm detection method based on waveform contrast ratio optimal algorithm

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

Active Publication Date: 2017-12-12
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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  • Moving target constant false alarm detection method based on waveform contrast ratio optimal algorithm
  • Moving target constant false alarm detection method based on waveform contrast ratio optimal algorithm
  • Moving target constant false alarm detection method based on waveform contrast ratio optimal algorithm

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[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, and the protection scope of the present invention will be defined more clearly.

[0031] Reference Figure 1-Figure 5 , A moving target constant false alarm detection method based on the optimal algorithm of waveform contrast,

[0032] The key of terahertz fuze target detection is motion compensation, in which the estimation accuracy of motion parameters determines whether 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, and α is the estimated value of the phase error coefficient, Represents ...

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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 particularly relates to a moving target constant false alarm detection method based on a waveform contrast optimal algorithm. Background technique [0002] Terahertz (THz) high-resolution fuzes obtain extremely high resolution by transmitting broadband waveform signals, thereby obtaining more target information. However, because the scattering center of the target spreads to multiple distance 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 It is an extended area target t composed of multiple scatterers in different radar range units. Therefore, for the terahertz high-resolution radar system, the detection of range extended targets can no longer directly use conventional low-resolution radar point target det...

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Application Information

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Patent Type & Authority Applications(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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