Satellite-borne GNSS-S radar system and ship target detecting and tracking method thereof
A radar system, detection and tracking technology, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc. Low transmission power and other issues, to achieve the effect of large-scale search and long-term tracking, compact structure, and small volume
Pending Publication Date: 2022-05-27
BEIJING SATELLITE INFORMATION ENG RES INST
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[0003] However, the height of GNSS navigation satellites from the ground is relatively high, and the signal transmission power is small. The signal power reaching the ground is usually around -130dBm, and the satellite signals after scattering will be weaker, which makes the spaceborne GNSS-S radar realize the Target detection is very difficult
In addition, ships on the sea usually appear in the form of a fleet with multiple targets at the same time, and the positions and trajectories of each ship are different. The GNSS-S signal is limited by the bandwidth and the spatial resolution is low, so as to realize the simultaneous tracking of multiple ship targets. more difficult
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[0029] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, 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.
[0030] 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.
[0031] In one embodiment of the present invention, a spaceborne GNSS-S radar system based on an all-digital array antenna and a ship target detection and tracking method are provided.
[0032] refer to figure 1 , the spaceborne GNSS-S radar system includes: a navigation satel...
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The invention relates to a satellite-borne GNSS-S radar system and a ship target detecting and tracking method thereof. The satellite-borne GNSS-S radar system comprises a navigation satellite direct signal processing subsystem, a target signal detecting and tracking subsystem, a target trajectory forming subsystem and an echo signal storage subsystem. The navigation satellite direct signal processing subsystem is used for receiving and processing a direct signal of a navigation satellite to obtain a pseudo code and Doppler frequency shift information of the direct signal; the target signal detection tracking subsystem is used for receiving a target scattering signal of a navigation satellite, scanning and searching a target sea area and tracking a target at the same time; the target trajectory forming subsystem is used for comprehensively processing the speed and the position of the target to obtain the motion trajectory of the target and rejecting false targets; and the echo signal storage subsystem is used for storing the comprehensive processing result of the target scattering signal, the target detection result and the motion trail of the target. Searching detection and tracking monitoring of a large number of ship targets on the sea surface can be achieved at the same time.
Description
technical field [0001] The invention relates to the technical field of radar detection and tracking, in particular to a spaceborne GNSS-S radar system based on an all-digital array antenna and a ship target detection and tracking method thereof. Background technique [0002] GNSS Scattered Signal Detection (Global Navigation Satellite System–Scatter, GNSS-S) radar uses the scattered signals of GNSS navigation satellites to detect ship targets on the sea surface. It has abundant signal sources, all-weather detection, anti-radio silence and radar stealth. , low load power consumption and easy satellite loading. This technology can complement electronic reconnaissance, radar and optical reconnaissance, improve our army's battlefield perception ability, and is an important means of marine reconnaissance and surveillance. In recent years, the detection of sea surface targets based on GNSS-S signals has become a hotspot of scientific research. [0003] However, the height of GNS...
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Login to View More IPC IPC(8): G01S13/88G01S19/14G01S19/37
CPCG01S13/88G01S19/14G01S19/37Y02A90/10
Inventor 岳富占高文宁夏正欢赵志龙张涛汤丁诚张庆君金世超梁银川易春宏
Owner BEIJING SATELLITE INFORMATION ENG RES INST