Information-combined quadratic equality constraint least square radiation source positioning method

Abstract

The invention belongs to the field of radiation source positioning, and particularly relates to an information-combined quadratic equality constraint least square radiation source positioning method, which comprises the following steps of: performing two-dimensional direction finding on a ground short-wave radiation source by using a plurality of direction finding stations to obtain azimuth angle and elevation angle information of the radiation source, and constructing nonlinear observation equations of the azimuth angle and the elevation angle; obtaining an ionosphere virtual height observation model; respectively converting the nonlinear observation equations of the azimuth angle and the elevation angle into pseudo-linear observation equations in combination with an ionosphere virtual height observation model, and combining the pseudo-linear observation equations to form a two-dimensional angle pseudo-linear observation equation; constructing a quadratic equality constraint least square optimization model, and converting a model constraint optimization problem into a nonlinear equation set problem about a Lagrange multiplier; and iteratively solving and determining a position vector and a covariance matrix thereof under the earth-centered earth-fixed coordinate system of the short-wave radiation source according to a solving result so as to obtain the latitude and longitude of the short-wave radiation source. According to the invention, the positioning precision of the short-wave radiation source is improved, and more accurate radiation source target positioning information is obtained.

Description

technical field [0001] The invention belongs to the field of radiation source positioning, and in particular relates to a quadratic equation-constrained least squares radiation source positioning method of information union. Background technique [0002] 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 national defense security. 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, the active positioning system usually needs to rely on the transmission of high-power electromagnetic signals to complete, so it is very easy to expose its position and be easily...

AI Technical Summary

Problems solved by technology

As we all know, short-wave direction-finding intersection positioning is a very important multi-station passive positioning technology, which is mainly aimed at positioning long-distance over-the-horizon radiation sources. The azimuth information and the earth ellipse model determine the position information of the short-wave radiation source. The advantage of this type of positioning method is that it can quickly determine the position coordinates of the short-wave radiation source, but the disadvantage is that it can only use the azimuth information provided by each direction-finding station. , it is difficult to directly use the elevation angle information provided by each direction-finding station for intersection positioning, so there is still room for further improvement in its positioning accuracy

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