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Non-cooperative signal sensing system and multi-dimensional parameter estimation method of satellite-borne passive SAR

A perception system and non-cooperative technology, applied in the field of radar, can solve the problems of low system imaging duty cycle, inability to perceive and utilize SAR satellite information, etc., achieve high flexibility, ensure parameter estimation accuracy, and large imaging duty cycle Effect

Pending Publication Date: 2022-02-01
SPACE STAR TECH CO LTD
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Problems solved by technology

However, the cooperative detection system can only perceive and utilize the signals of a limited number of SAR satellites, and cannot perceive and utilize the information of all SAR satellites in orbit, resulting in a low system imaging duty ratio

Method used

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  • Non-cooperative signal sensing system and multi-dimensional parameter estimation method of satellite-borne passive SAR
  • Non-cooperative signal sensing system and multi-dimensional parameter estimation method of satellite-borne passive SAR
  • Non-cooperative signal sensing system and multi-dimensional parameter estimation method of satellite-borne passive SAR

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Embodiment Construction

[0042] In order to better understand the above technical solutions, the technical solutions of the present application will be described in detail below through the accompanying drawings and specific examples. It should be understood that the embodiments of the present application and the specific features in the examples are detailed descriptions of the technical solutions of the present application, and It is not a limitation to the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments can be combined without conflict.

[0043] The non-cooperative signal perception system and multi-dimensional parameter estimation method of the spaceborne passive SAR provided by the embodiment of the present application will be further described in detail below in conjunction with the accompanying drawings. The specific implementation methods may include (such as Figure 1-8 shown):

[0044] In the scheme ...

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Abstract

The invention discloses a non-cooperative signal sensing system and a multi-dimensional parameter estimation method of a satellite-borne passive SAR and belongs to the technical field of radars. The invention provides a non-cooperative SAR signal sensing system and the non-cooperative SAR signal multi-dimensional parameter estimation method. The non-cooperative SAR signal sensing system comprises a zenith sensing antenna, a direct signal array receiving unit, a ground detection antenna and an echo signal array receiving unit, and receives non-cooperative SAR direct signals and echo signals. The non-cooperative SAR signal multi-dimensional parameter estimation method involves a direct-arrival signal time-frequency-space characteristic estimation unit and an antenna beam pointing parameter estimation unit and achieves multi-dimensional parameter estimation and antenna pointing estimation of non-cooperative SAR signals. Compared with a traditional satellite-borne SAR system, the satellite-borne passive SAR does not need to transmit any signal, can sense and capture available non-cooperative SAR signal sources in space in real time, and uses the non-cooperative SAR signal sources to perform double-station SAR imaging detection.

Description

technical field [0001] The invention relates to a non-cooperative signal perception system and a multi-dimensional parameter estimation method of spaceborne passive SAR, and belongs to the technical field of radar. Background technique [0002] International SAR satellites have been developed for more than 40 years, and the number of SAR satellites in orbit has exceeded 40. In recent years, with the maturity of commercial miniaturized SAR satellite technology, nearly a thousand miniaturized SAR satellites will be in orbit in the next 5 to 10 years. Limited by the statutory operating frequency, large-scale miniaturized SAR satellites will inevitably have certain electromagnetic interference problems. It is urgent to study a new type of SAR technology, that is, spaceborne passive SAR system technology. The space-borne passive SAR system does not need to actively transmit high-power broadband signals, but only needs to perceive and utilize the signals of other SAR satellites ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 杨钰茜夏正欢赵志龙尹心石慧峰张涛刘新刘敦歌张瑶郭宇华岳富占
Owner SPACE STAR TECH CO LTD
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