Multi-sensor passive synergic direction finding and positioning method

Abstract

The invention provides a multi-sensor passive synergic direction finding and positioning method.By the adoption of the method, target positioning capacity under the condition that a multi-passive-sensor observed value hops, time is asynchronous and precision difference is large can be improved remarkably, and high-precision synergic direction finding and positioning can be achieved.According to the technical scheme, multi-sensor measurement data is input into passive synergic direction finding and positioning software, outliers distinguishing is conducted on the observed value by means of a predicted residual, and extrapolation is conducted with the extension forgetting factor recursive least-square filtering algorithm to the same moment; then a weighting matrix is calculated with a measurement covariance matrix, the observation linear equation system of multiple sensors is established, the initial estimate value of a target position is solved, increment is calculated with the weighting gauss-newton descent method, iterative solution is conducted on the target position, the significance testing statistics of the increment is judged, and iterative computation is stopped and the iterative estimation solution obtained at the moment is output to serve as final target positioning information when it is judged that estimation convergence occurs.

Description

technical field [0001] The invention relates to the technical field of target tracking and positioning, in particular to a high-precision passive cooperative direction finding and positioning method for targets under the conditions of multi-sensor observation value jumps, time asynchrony, and large precision differences. Background technique [0002] In modern warfare, the positioning and tracking of targets plays an increasingly prominent role. However, active detection methods represented by radar are vulnerable to anti-radiation missile attacks. In this case, it is more meaningful to use the passive positioning method based on electronic reconnaissance to locate the radiation source target. Passive positioning means that the observation sensor does not actively transmit signals, mainly using the angle information, time information or Doppler information received by the target radiation source relative to the sensor, using one or more of the angle, time difference, Doppler...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of decreased positioning accuracy caused by the failure of multiple passive sensors, the purpose of the present invention is to provide a multi-sensor passive cooperative direction-finding positioning method that can effectively eliminate outliers and improve positioning accuracy, so as to improve the accuracy of multi-passive sensor observation. The ability to locate targets in the case of value jumps, time out of synchronization, and large differences in accuracy

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