Sea clutter Doppler spectrum characteristic analysis and comparison method

A technology of Doppler spectrum and spectral characteristics, applied in the field of sea clutter Doppler spectrum characteristics analysis and comparison, can solve the problems of differences in Doppler spectrum characteristics and difficult long-term observation, and achieve the effect of expanding data sources

Active Publication Date: 2020-03-24
中国电波传播研究所
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Problems solved by technology

[0003] In order to obtain more sea clutter data under the conditions of ocean parameters, one is time accumulation and long-term observation, which is more suitable for shore-based fixed platforms, and the other is spatial changes, in different sea areas However, some sea areas are restricted by various conditions, and it is difficult to find a

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  • Sea clutter Doppler spectrum characteristic analysis and comparison method
  • Sea clutter Doppler spectrum characteristic analysis and comparison method
  • Sea clutter Doppler spectrum characteristic analysis and comparison method

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Embodiment 1

[0045] Example 1, such as figure 1 As shown, this embodiment discloses a method for analyzing and comparing sea clutter Doppler spectral characteristics, including the following steps:

[0046] Step 1, sea clutter average Doppler spectrum estimation and frequency shift spectral width calculation:

[0047] For the sea clutter data collected by the radar on the ship-borne platform and the fixed platform, firstly, the power spectral density function estimation algorithm is used to obtain the average Doppler spectrum of each group of data on each range gate, and then according to the The maximum spectral peak position of the average Doppler spectrum is dynamically set to a certain interval range, and the spectral center and spectral broadening of the Doppler spectrum are estimated by the integral method to obtain the initial value of the frequency shift and spectral width;

[0048] The power spectral density function estimation algorithm adopts the Welch or Burg spectral estimati...

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Abstract

The invention discloses a sea clutter Doppler spectrum characteristic analysis and comparison method. The method comprises the following steps: step 1, sea clutter average Doppler spectrum estimationand frequency shift spectrum width calculation; step 2, sea clutter frequency shift and spectral width correction of the shipborne platform; and step 3, marine environment parameter matching and testparameter influence analysis and comparison. Aiming at the phenomena of platform difference influence and complex and diverse test parameter conditions existing in sea clutter Doppler spectrum characteristic analysis and comparison of the same radar in multi-platform test, the invention provides the sea clutter Doppler spectrum characteristic analysis and comparison method. The influence caused bythe movement of the shipborne platform is corrected, and a certain analysis sequence and steps are designed according to the size difference of the influence of radar parameters and marine environment parameters, so that the Doppler spectrum characteristic difference of the same radar under various marine environment conditions tested by different platforms can be conveniently and quickly obtained.

Description

technical field [0001] The invention belongs to the research field of clutter Doppler characteristics, in particular to a method for analyzing and comparing sea clutter Doppler spectrum characteristics of multi-platform testing in the field. Background technique [0002] Maritime radar surveillance system will inevitably be affected by random signals of radar echoes from the sea surface, that is, sea clutter. The analysis of time correlation is helpful to design detection algorithms to distinguish between targets and sea clutter. Sea clutter time correlation is usually called pulse-to-pulse correlation, and is often described by clutter power spectrum. Because the sea surface is moving, the sea clutter spectrum will produce Doppler frequency shift, so it is also called Doppler spectrum. In processing such as radar moving target detection, in order to effectively suppress clutter, it is necessary to accurately estimate the center position and spectral width of the clutter Do...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 许心瑜张金鹏张玉石李清亮李慧明张浙东万晋通余运超黎鑫尹雅磊朱秀芹尹志盈赵鹏夏晓云李善斌
Owner 中国电波传播研究所
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