GNSS passive radar air moving target remote sensing detection method and system
A detection method and air motion technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as inability to accurately detect targets, improve detectability, reduce noise power, and solve The effect of improved accuracy
Active Publication Date: 2022-06-21
CHANGSHA UNIVERSITY
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[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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The invention discloses a GNSS passive radar air moving target remote sensing detection method and system, and the method comprises the steps: employing a GNSS signal as a signal source, and employing a bistatic radar model as a signal receiving model; signals emitted by several satellites are received at the same time through the same receiver, and noise cancellation is carried out on the signals by using the self-correlation characteristic of GNSS codes; and generating RDM by using the denoised signal, estimating the carrier phase of the air moving target, and resolving to obtain the motion state information. According to the invention, the accuracy of estimating the Doppler frequency of the moving target by the RDM is improved.
Description
technical field [0001] The present 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 air moving targets based on RDM (Range-Doppler Map, range-Doppler map) signal-to-noise ratio improvement Detection method and system. Background technique [0002] It is a non-contact and emerging remote sensing method to use GNSS signal as the signal source and use the principle of radar for environmental remote sensing. However, due to problems such as weak signal and low resolution, this technology has not been applied to the actual detection environment. [0003] Moving targets are hotspots and difficulties in radar environment 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 the moving target is obtained by detecting the Doppler frequency ...
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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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