A short-wave sky-wave propagation time difference positioning method based on Taylor series straight-line distance
A straight-line distance and sky-wave propagation technology, applied in the field of radiation source positioning, can solve problems such as errors and large radiation source positioning, and achieve high positioning accuracy
Active Publication Date: 2022-06-07
WUHAN UNIV
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Therefore, applying the existing algorithm to the location of the radiation source under the condition of short-wave sky-wave propagation will cause a large error
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[0050] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0051] In the process of electromagnetic wave propagation, the propagation principle of direct wave and short wave is obviously different: short wave time difference positioning is different from direct wave time difference positioning. Therefore, the time difference data obtained based on the line-of-sight propagation principle cannot be directly used as the straight-line dista...
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The invention provides a short-wave sky-wave propagation time difference positioning method based on Taylor series linear distance. Based on the equivalent path principle, the present invention equates the ground and the ionosphere into two parallel uniform planes within a preset range; on the ground equivalent to a uniform plane, a plurality of receiving stations and radiation sources are set, and The equivalent radiation source is virtualized at the position vertically above the radiation source; the distance of the signal from the receiving station to the equivalent radiation source is calculated, and the distance from the receiving station to the equivalent radiation source is used as the propagation distance of the signal from the real radiation source to the receiving station; Obtain the distance difference of the signal from the equivalent radiation source to different receiving stations, and perform Taylor expansion on the distance difference equation of the signal from the equivalent radiation source to different receiving stations to obtain the coordinates of the radiation source. The invention has the advantages that the time difference positioning can be performed under the short-wave operating frequency without measuring the information of the ionosphere, and the positioning accuracy is improved.
Description
technical field [0001] The invention relates to the field of radiation source positioning, in particular to a short-wave sky-wave propagation time difference positioning method based on a Taylor series straight-line distance. Background technique [0002] The propagation process of radio waves in the earth, the earth's atmosphere and space is called radio wave propagation. Radio wave propagation can be used for communication and target detection. With the continuous development of electromagnetic warfare, passive positioning technology does not radiate any signals and only works by receiving external signals; the advantage of not requiring high target radiation sources plays an irreplaceable role in electronic warfare. effect. [0003] At present, the passive positioning technology in the prior art is a positioning method in which a positioning signal receiver is used to locate a target. At present, the research on the passive time difference positioning algorithm at home...
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IPC IPC(8): G01S5/06
CPCG01S5/06Y02A90/10
Inventor 周晨李琛吕明杰赵正予
Owner WUHAN UNIV