Sea clutter suppression method for marine radar

A marine radar and sea clutter technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as signal amplitude attenuation of nearby targets

Inactive Publication Date: 2011-09-07
NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that in the existing marine radar sea clutter suppression method, while suppressing the sea clutter near the radar, the signal amplitude of nearby targets may be greatly attenuated. The Suppression Method of Radar Sea Clutter

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  • Sea clutter suppression method for marine radar
  • Sea clutter suppression method for marine radar
  • Sea clutter suppression method for marine radar

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, provide the specific embodiment of the present invention. It should be noted that the parameters in the examples do not affect the generality of the present invention.

[0046] The characteristics of sea clutter include two aspects: one is to determine the amplitude distribution and power spectrum type of sea clutter; the other is to determine the parameters of the amplitude distribution and power spectrum model according to the specific radar system and radar working environment. The sea clutter amplitude distribution function is very important for designing signal and information processing algorithms such as target detection, estimation, tracking and recognition. The schematic flow chart of the embodiment of the present invention is as figure 1 As shown, the details are as follows:

[0047] S1. Initialization, complete the initialization of parameters and data initialization, as follows:

[0048] S11. According to th...

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Abstract

The invention discloses a sea clutter suppression method for a marine radar. Most of the existing marine radars can not process the nearby sea clutter, and the existing sea clutter suppression methods usually suppress the sea clutter according to a fixed template, which can result in the great attenuation in the amplitude of a nearby target signal or even result in miss detection. The sea clutter suppression method provided for overcoming the above disadvantages comprises the following steps: initializing parameters and data, estimating parameters, suppressing the sea clutter and updating an estimation sample. The method can estimate the sea clutter according to different sea clutter distributions selected according to different sea conditions, and determine whether the sample data need to be updated for re-estimation according to the suppression effect, thereby maximally reducing the influence to the target while suppressing the sea clutter as much as possible, and obviating the great attenuation in the amplitude of the nearby target signal.

Description

technical field [0001] The invention belongs to the technical field of marine radar, in particular to the suppression of sea clutter therein. Background technique [0002] Marine radar is one of the indispensable navigation equipment for ships, but the detection and tracking performance of marine radar is often affected by the scattering of electromagnetic waves on the surface of waves (that is, sea clutter), especially when detecting small targets flying at low altitudes skimming the sea. The clutter problem is more serious. It is well known that clutter increases the false alarm probability or correspondingly reduces the detection probability for a constant false alarm rate. This situation may be even more serious for sea clutter, because compared with ground clutter, sea clutter is moving and undulating, so it is difficult to eliminate. Most of the existing marine radars do not deal with the sea clutter near the radar, which leads to the so-called "big pie" phenomenon i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
Inventor 段昶姚云萍
Owner NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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