一种适用于机场场面MLAT监视系统的定位算法及其性能分析

doi:10.7527/S1000-6893.2014.0293

Abstract

Abstract:

Instead of regular three-dimensional targets, the height of targets at airport surface is a known constant and it should be considered when designing an multilateration (MLAT) system suitable for surveillance at civil airport surface. Based on the characteristics of target at airport surface and MLAT, we propose a modified time of difference arrival (TDOA) positioning algorithm, which is especially useful for MLAT system for the airport surface surveillance. Compared with traditional three-dimensional positioning way, the proposed algorithm not only improves the positioning accuracy but also gets greater system robustness. A corresponding Cramer-Rao lower bound(CRLB) of this algorithm is achieved, and the theoretical relation between two-dimensional and three-dimensional positioning algorithms is deduced, which further proves that the algorithm has higher precision than three-dimensional way. Meanwhile we use condition number theory to prove that the proposed algorithm has stronger robustness than three-dimensional positioning way. The simulation and practical measured data verify the correctness and effectiveness of the above conclusions.

Key words: multilateration system, condition numbers, time of difference arrival, Cramer-Rao lower bound, robustness, passive location

CLC Number:

PENG Wei, HUANG Rongshun, GUO Jianhua, JIANG Kai, HE Donglin. A location algorithm suitable for MLAT surveillance system at airport surface and its performance analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(9): 3050-3059.

References

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A location algorithm suitable for MLAT surveillance system at airport surface and its performance analysis

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