A Method for Realizing 3D Positioning of Non-cooperative Bi-Multistatic Radar Targets

Abstract

The invention discloses a method for achieving three-dimension positioning of a non-cooperative double multistatic radar target. The method belongs to the technical field of passive double multistatic radar target positioning. In a non-cooperative double multistatic radar, an existing target position estimating method based on the iterative optimal algorithm has the defect that due to the non-linear relationship between a target position and double base parameters, if the initial value is not properly selected, a wrong solution can be obtained and in addition, the iterative algorithm consumes lots of time. Thus, the invention provides the method for obtaining an analytical solution of a three-dimension position of the non-cooperative double multistatic radar target. The method integrates measuring of multiple pairs of transmitters and receivers and deduces the analytical solution of the three-dimension position of the target through a model of minimal target position error vectors of the target position. The method for achieving three-dimension positioning of the non-cooperative double multistatic radar target is fast in arithmetic speed, suitable for a double multistatic radar system to perform target positioning, wherein the double multistatic radar system carries out opportunity detecting based on all sorts of opportunity illuminators. Initiation of a target track is facilitated and a better result can also be obtained under the multiple-target environment.

Description

1. Technical field [0001] The invention belongs to the technical field of passive dual multistatic radar target positioning, in particular to a three-dimensional positioning method for non-cooperative dual multistatic radar targets. 2. Background technology [0002] In the non-cooperative bistatic radar, by comparing the direct wave reference signal and the echo signal reflected by the target, the relative time delay of the target echo can be determined, that is, the bistatic time delay, which is different from the bistatic distance (i.e., the transmitter to The distance from the target to the receiver corresponds to the difference in the transmitter-receiver distance). For a geometric configuration with a certain bistatic baseline distance, the corresponding bistatic distance sum is constant, and the possible position of the target is on the ellipse with the transmitter and receiver as the focus. If multiple sets of bistatic range measurements with different geometric conf...

AI Technical Summary

Problems solved by technology

Due to the nonlinear relationship between the target position and the bistatic parameters, the cost function, that is, the modulus of the error, may have a local minimum value, and the optimization problem is difficult to obtain a solution

Therefore, standard numerical optimization algorithms may not obtain the correct solution if the initial value of the target position iteration is chosen improperly.

In addition, the defect of this target positioning method based on the numerical iterative optimization algorithm is very time-consuming, so it is necessary to consider finding a method that can obtain a simple closed solution of the target three-dimensional position

However, in the currently published literature, no literature has been found that uses the intersection points of different ellipses corresponding to transmitters and receivers with different spatial geometric configurations in the three-dimensional Cartesian coordinate system to obtain the analytical solution of the target position

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