A kind of gnss passive radar remote sensing detection method and system for air moving target

A detection method and space motion technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as inaccurate detection of targets, improve detectability, and improve Doppler frequency accuracy , The effect of improving the solution accuracy

Active Publication Date: 2022-08-05
CHANGSHA UNIVERSITY
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Problems solved by technology

[0005] The invention provides a GNSS passive radar remote sensing detection method and system for air moving targets, which is used to solve the technical problem that the target cannot be accurately detected in the dynamic target state calculation

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  • A kind of gnss passive radar remote sensing detection method and system for air moving target
  • A kind of gnss passive radar remote sensing detection method and system for air moving target
  • A kind of gnss passive radar remote sensing detection method and system for air moving target

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0035] see figure 1 , a GNSS passive radar remote sensing detection method for air moving targets of the present invention comprises the following steps:

[0036] S1: The GNSS signal is used as the signal source, and the bistatic radar model is used as the signal receiving model; the signals transmitted by several satellites are simultaneously received by the same receiver, and weak signals and strong signals are selected respectively. The determination of weak signal and strong signal is mainly based on the satellite signal-to-noise ratio map after tracking capture. The satellite signal with relatively high peak-to-peak value in the signal-to-noise ratio graph is defined as a strong signal, and the satellite signal with relatively low peak-to-peak valu...

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Abstract

The invention discloses a GNSS passive radar remote sensing detection method and system for air-to-air moving targets. Using the autocorrelation characteristic of GNSS code to cancel the noise of the signal; use the denoised signal to generate RDM, estimate the carrier phase of the moving target in the air, and obtain the motion state information. The invention improves the accuracy of the Doppler frequency estimation of the moving target by the RDM.

Description

technical field [0001] The invention relates to the technical field of environmental remote sensing, in particular to a GNSS (Global Navigation Satellite System, global satellite navigation system) passive radar remote sensing of moving targets in the air based on an RDM (Range-Doppler Map, range Doppler map) signal-to-noise ratio improvement Detection method and system. Background technique [0002] Using GNSS signal as the signal source and using the principle of radar to carry out environmental remote sensing is a non-contact and emerging remote sensing method. However, due to the weak signal and low resolution, this technology has not been applied to the actual detection environment. [0003] Moving targets are the hotspots and difficulties of radar environmental remote sensing. The GNSS-R method has its inherent advantages, but the low signal-to-noise ratio leads to Doppler RDM ambiguity. The detection of moving targets is obtained by detecting the Doppler frequency s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/45G01S19/43G01S13/86G01S13/00
CPCG01S19/45G01S19/43G01S13/86G01S13/003
Inventor 张竹娴郑昱聂俊伟朱培栋吴鹏
Owner CHANGSHA UNIVERSITY
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