GLRT-based target detection method under a plurality of heterogeneous satellites

A target detection and satellite technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of inconsistent actual scenes, low detection reliability, unsuitable target detection, etc.

Active Publication Date: 2017-08-18
GUILIN CHANGHAI DEV
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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the traditional time-frequency two-dimensional coherent detection method is inconsistent with the actual scene, the detection reliability is low, and it is not suitable for target detection under multiple radiation sources

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  • GLRT-based target detection method under a plurality of heterogeneous satellites
  • GLRT-based target detection method under a plurality of heterogeneous satellites
  • GLRT-based target detection method under a plurality of heterogeneous satellites

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[0075] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0076] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0077] Such as figure 1 As shown, the GLRT-based target detection method under a plurality of heterogeneous satellites provided by the embodiment of the present invention comprises the following steps:

[0078] S101: Modeling the received signals of the reference channel and the monitoring channel, separating the reference channel signal and substituting it into the monitoring channel signal;

[0079] S102: Establish a binary hypothesis according to the received signal of the monitorin...

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Abstract

The invention belongs to the field of target detection and signal processing technology and discloses a GLRT-based target detection method under a plurality of heterogeneous satellites. The method comprises the steps: received signals of a reference channel and a monitoring channel is modeled, the reference channel signals are separated and are substituted into monitoring channel signals; binary hypothesis is established according to the received signal of the monitoring channel, and probability density functions of signals under two hypotheses are given out; maximum likelihood estimations of unknown parameters under two sypotheses are respectively estimated through using a maximum likelihood estimation method according to two probability density functions; according to the maximum likelihood estimations of unknown parameters, detection statistics based on a generalized likelihood ratio are obtained, and a detector is obtained; according to the probability distribution of the detection statistics, an optimal decision threshold of the detector is obtained, the judgment is performed, and the target is detected. According to the invention, the method can effectively realize moving target detection under a plurality of heterogeneous satellite radiation sources.

Description

technical field [0001] The invention belongs to the technical field of target detection and signal processing, in particular to a GLRT-based target detection method under a plurality of heterogeneous satellites. Background technique [0002] Aiming at the problem that the traditional time-frequency two-dimensional coherent detection method is sensitive to the noise of the reference channel, the existing method achieves the purpose of weak echo detection through the detection method based on the generalized likelihood ratio. However, this detection method is based on a single radiation It is not suitable for target detection in the scene of multiple satellite radiation sources in the actual environment. D.E.Hack, L.K.Patton, B.Himed et al. derived a generalized likelihood ratio detector for passive multi-static detection with known noise variance by modeling the received signal as a definite signal but the signal parameters are unknown, but in the actual scene The noise vari...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 刘明骞李兵兵高修会
Owner GUILIN CHANGHAI DEV
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