TY - JOUR
T1 - Mode identification and location improvement based on data association of OTHR and azimuth-only sensors
AU - Kong, Ruonan
AU - Cheng, Yongmei
AU - Liang, Yan
AU - Wang, Zengfu
AU - Sui, Zhijia
PY - 2012/6
Y1 - 2012/6
N2 - Target tracking of over-the-horizon radar (OTHR) faces the challenge of low detection probability, low sampling rate, low measurement precision and multipath propagation. Identification of propagation modes and improvement of target location accuracy will significantly affect both data association and estimate updating, and thus they become the key concern on OTHR target tracking. In this paper, a scheme of measurement fusion of OTHR and azimuth-only sensors is presented to identify propagation/clutter modes and improve location accuracy. Measurements of azimuth-only sensors are first fused to obtain the preliminary estimates of location position via the standard least square method. Then, based on the above position estimate and OTHR measurements, a maximum-likelihood-estimation-based data association rule is proposed to identify the propagation modes and clutter mode. Finally, a minimum variance estimation method is given to improve the estimate of target position by fusing the associated data from OTHR and azimuth-only sensors. In simulation, it is found that the identification of propagation/clutter modes is satisfactory, and there is significant improvement on azimuth. However, the method does not result in significant improvement in the accuracy of geographical distance from the OTHR receiver to the target.
AB - Target tracking of over-the-horizon radar (OTHR) faces the challenge of low detection probability, low sampling rate, low measurement precision and multipath propagation. Identification of propagation modes and improvement of target location accuracy will significantly affect both data association and estimate updating, and thus they become the key concern on OTHR target tracking. In this paper, a scheme of measurement fusion of OTHR and azimuth-only sensors is presented to identify propagation/clutter modes and improve location accuracy. Measurements of azimuth-only sensors are first fused to obtain the preliminary estimates of location position via the standard least square method. Then, based on the above position estimate and OTHR measurements, a maximum-likelihood-estimation-based data association rule is proposed to identify the propagation modes and clutter mode. Finally, a minimum variance estimation method is given to improve the estimate of target position by fusing the associated data from OTHR and azimuth-only sensors. In simulation, it is found that the identification of propagation/clutter modes is satisfactory, and there is significant improvement on azimuth. However, the method does not result in significant improvement in the accuracy of geographical distance from the OTHR receiver to the target.
KW - Azimuth-only sensors
KW - Data fusion
KW - Location improvement
KW - Mode identification
KW - Over-the-horizon radar
UR - http://www.scopus.com/inward/record.url?scp=84864514201&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:84864514201
SN - 1000-6893
VL - 33
SP - 1061
EP - 1069
JO - Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
JF - Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
IS - 6
ER -