基于前置接收机的天波超视距雷达回波模式辨识与定位精度提升

doi:10.7527/S1000-6893.2013.0312

Abstract

Abstract:

Target tracking of over-the-horizon radar (OTHR) faces the challenge of low detection probability, low sampling rate, low measurement accuracy and multipath propagation. Both mode recognition of multipath propagation and target localization, significantly affect data association and estimate updating. In this paper, a scheme of measurement fusion of OTHR and forward-based receivers (FBRs) is presented to identify propagation modes and improve positioning accuracy. A coordinate transformation formula related to the target height is derived, and the measurements of FBRs are fused to obtain the preliminary estimates of the target state and ionosphere heights via an iterative least square method. Based on the above position estimate and OTHR measurements, a maximum-likelihood-estimation-based rule is proposed to identify the propagation/clutter modes. Finally, a minimum variance estimation method is given to improve positioning accuracy by fusing the associated data from OTHR and FBRs in ground coordinates. Simulation results show that the identification of propagation modes is satisfactory, the ionospheric heights and target heights can be estimated, and there is significant positioning accuracy improvement through fusing measurements of OTHR and FBRs.

Key words: over-the-horizon radar (OTHR), mode identification, forward-based receiver, positioning accuracy, data fusion, target tracking

CLC Number:

V219

FENG Xiaoxue, LIANG Yan, JIAO Lianmeng, ZHOU Lin. Mode Identification and Positioning Accuracy Improvement Using Forward-based Receivers for OTHR[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(11): 2590-2598.

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Mode Identification and Positioning Accuracy Improvement Using Forward-based Receivers for OTHR

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