Real-time high-precision position solution method for multilateration system

Abstract

The invention provides a real-time high-precision position solution method for a multilateration system. The position solution method comprises the following steps: (1) storing far-end unit information to a buffer memory by using a central processing unit of the multilateration system, judging consistency of time labels and screening effective information; (2) processing the effective information by using the Chan algorithm and calculating a target initial positioning value; (3) substituting the target initial positioning value into the Taylor series expansion method and carrying out recursive operation so as to obtain high-precision positioning information; and (4) subjecting the positioning information to filtering processing by using the self-adaptive Kalman filtering algorithm and reporting the processed positioning information to a display and control system or command system. The position solution method provided by the invention has obviously improved instantaneity and solution precision compared with traditional methods and carries out target positioning through combination of a plurality of algorithms, so requirements on hardware of the central processing unit and on the number of far-end units are lowered down, and cost for hardware in the system is reduced.

Description

technical field [0001] The invention relates to the field of a multipoint positioning system, in particular to a real-time high-precision position calculation method for a multipoint positioning system. Background technique [0002] The multilateration system is another new type of air traffic control monitoring technology vigorously promoted by the International Civil Aviation Organization after the ADS-B technology. The multi-point positioning system is compatible with all the functions of ADS-B, and it can also monitor the aircraft equipped with ordinary A / C / S mode transponders with high precision and reliability in real time. However, this real-time high-precision and reliable monitoring must be based on the real-time High-precision position calculation. Due to the limitations of the technical level, how to further improve the accuracy of the target calculation to ensure the accuracy of the airport surface target monitoring required by the International Civil Aviation h...

AI Technical Summary

Problems solved by technology

The Chan algorithm has a small amount of calculation and does not require iterative operations, but its positioning accuracy is poor in non-line-of-sight environments; Taylor series expansion requires an iterative initial value for iterative operations in order to obtain accurate target positions in a short time; Friedlander algorithm There is a large dependence on the number of remote units. When the number is reduced, the positioning accuracy is significantly reduced; the line-of-sight algorithm represented by the Fang algorithm does not meet the needs of the multi-point positioning system for actual engineering over-the-horizon

[0004] In short, any of the above position calculation algorithms has more or less defects, and cannot achieve the best balance among cost control, real-time and positioning accuracy

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