Short-wave multi-station and single-satellite cooperative direct positioning method based on two-dimensional direction of arrival

Abstract

The invention discloses a short-wave multi-station and single-satellite cooperative direct positioning method based on a two-dimensional direction of arrival, and the method comprises the steps: sequentially building an algebraic relation between the geographic coordinates of a to-be-positioned radiation source which can transmit a short-wave signal and a satellite signal at the same time and theazimuth angle and elevation angle of the transmitted short-wave signal arriving at different short-wave observation stations; determining a derivative expression of an array manifold vector in the short-wave observation station about geographic coordinates; establishing an algebraic relational expression between the geographical coordinates of the radiation source and the azimuth angle and the elevation angle of the emitted satellite signal reaching the single satellite; determining a derivative expression of an array manifold vector in a single satellite about geographic coordinates; and transmitting the acquired array signal data to a ground central station for processing, obtaining an optimization model for estimating the longitude and latitude of the radiation source based on the short-wave signal data and the satellite signal data, and performing numerical optimization to obtain an estimated value of the longitude and latitude of the radiation source. The method can remarkably improve the positioning precision of the earth surface long-distance radiation source.

Description

technical field [0001] The invention belongs to the technical field of wireless signal positioning, in particular to a short-wave multi-station and single-satellite collaborative direct positioning method based on two-dimensional direction of arrival. Background technique [0002] As we all know, wireless signal positioning technology is widely used in communication, radar, target monitoring, navigation telemetry, seismic survey, radio astronomy, emergency rescue, safety management and other fields, and it plays an important role in industrial production and military applications. [0003] Target positioning (that is, location parameter estimation) can be done using active equipment such as radar, laser, and sonar. This type of technology is called active positioning technology, which has the advantages of all-weather and high precision. However, active positioning systems usually need to rely on the transmission of high-power electromagnetic signals to achieve, so it is ver...

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Problems solved by technology

[0008] The present invention aims at the problem that the existing positioning system seldom uses different positioning means for collaborative processing and the positioning accuracy of long-distance radiation sources on the earth's surface is low. A short-wave multi-station and single-satellite cooperative direct positioning method based on two-dimensional direction of arrival, which can significantly improve the positioning accuracy of long-distance radiation sources on the earth's surface

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