A Direct Positioning Method of Single-station Shortwave Station under the Condition of Existing Calibration Source

Abstract

The invention relates to the technical field of short-wave single-station positioning, and discloses a short-wave single-station direct positioning method under the condition that a correction source exists. In the method, several short-wave correction sources with known positions are placed near the short-wave target source at the same time, and a single observation station is used The uniform circular array in the method receives shortwave signal data, and then determines the relationship between the azimuth and elevation angles of the received signal with respect to its longitude, latitude and ionospheric false height parameters, and then constructs parameters about the longitude, latitude and ionospheric false height of the target source based on the signal subspace fitting criterion The cost function of , using the Gauss-Newton iterative algorithm to jointly estimate the longitude and latitude of the target source and the false height of the ionosphere, so as to determine the target position information. Due to the existence of the correction source, the present invention can effectively suppress the influence of the false height deviation of the ionosphere on the positioning accuracy of the short-wave signal.

Description

technical field [0001] The invention relates to the technical field of short-wave single-station positioning, in particular to a short-wave single-station direct positioning method under the condition that a correction source exists. 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. 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 very easy to expose its positi...

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Problems solved by technology

[0006] The present invention aims at the problem of the influence of the false height error of the ionosphere, and provides a short-wave single-station direct positioning method under the condition that the correction source exists, so as to improve the single-station positioning accuracy of the short-wave radiation source

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