Satellite-borne GNSS-S radar ship target signal receiving and direct interference suppression method

A target signal and interference suppression technology, applied in satellite radio beacon positioning systems, using re-radiation, radio wave reflection/re-radiation, etc., can solve the problem of low signal power of navigation satellites, achieve broad market application prospects, receive The effect of a small number of channels and a high interference rejection ratio

Active Publication Date: 2022-06-24
BEIJING SATELLITE INFORMATION ENG RES INST
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  • Abstract
  • Description
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Problems solved by technology

However, the power of the navigation satellite signal is low, and after two-way attenuation, the power of the scattered signal of the ship target is much lower than the noise power

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  • Satellite-borne GNSS-S radar ship target signal receiving and direct interference suppression method
  • Satellite-borne GNSS-S radar ship target signal receiving and direct interference suppression method
  • Satellite-borne GNSS-S radar ship target signal receiving and direct interference suppression method

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Embodiment Construction

[0062] In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

[0063] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be repeated here, but the embodiments of the present invention are not limited to the following embodiments.

[0064] see figure 1 , the method for receiving large-area (large-scale) surface ship target signals of spaceborne GNSS-S radar and suppressing direct interference from navigation satellites (ie, direct interference signal suppression) of the space-borne GNSS-S radar of the p...

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Abstract

The invention relates to a satellite-borne GNSS-S radar ship target signal receiving and direct interference suppression method. The method comprises the following steps: a, optimizing an antenna; b, optimizing direct interference signal suppression; and c, performing digital beam forming on the GNSS-S signal. According to the invention, weak scattering signals of large-range sea surface ship targets can be received, and direct interference signals of a plurality of navigation satellites can be inhibited.

Description

technical field [0001] The invention relates to a method for receiving and suppressing direct interference of satellite-borne GNSS-S radar ship target signals. Background technique [0002] The detection of large-area surface ships has always been a hotspot of scientific research. Affected by weather such as clouds, rain and fog at sea, it is difficult for optical sensors to exert their high-resolution imaging and identification advantages in detection, while spaceborne SAR systems can penetrate clouds and fog. , has the characteristics of all-weather observation of the sea, and is suitable for high-resolution imaging and detection of surface ship targets. However, the existing spaceborne SAR system is difficult to achieve long-term tracking of ship targets, and the existing technology usually adopts the method of actively transmitting high-power signals, so it is easy to be intercepted and interfered. [0003] In this regard, some technologies use the reflected signal of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36G01S13/88G01S13/90G01S19/14G01S19/37
CPCG01S7/36G01S13/88G01S13/9004G01S13/9021G01S19/14G01S19/37
Inventor 夏正欢刘新赵志龙张涛尹心董启甲徐振兴金世超王海涛岳富占彭涛
Owner BEIJING SATELLITE INFORMATION ENG RES INST
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