减轻TOA和AOA定位系统非视距影响的方法
A New Method for Mitigating the Effect of NLOS Propagation in the TOA and AOA Hybrid Location System
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摘要: 结合圆位置线误差、直线位置线误差与参数误差的关系,该文提出了一种利用所有基站测量的波达时间与最近一个基站测量的所有多径的到达角进行混合定位的方法.在该方法中,对波达时间用测量的波达时间总是大于等于视距传播时间进行约束,对到达角用GBSBCM确定的最大角度扩展进行约束,以有效减小非视距传播的影响,提高定位精度.仿真结果证明了该方法的有效性。Abstract: Based on the relationship between the errors of the Circular Lines of Position (LOPs) and the straight LOPs and that of the measured parameters, a hybrid locating system in which the Time Of Arrival (TOA) and the Angle Of Arrival (AOA) measured by the closest Base Station (BS) are combined is presented to mitigate the effect of Non-Line-Of-Sight (NLOS) propagation in this paper. In order to reduce the feasible region of the Mobile Station (MS) and to improve the accuracy of the location estimation, the restrictions that TOA estimates are always greater than the true TOA values and the angle spreads are always smaller than the maximum angle spread determined by the Geometrically Based Single Bounce Circular Model (GBSBCM) are used. Its effectiveness is verified by the simulation.
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Rappaport T S, Reed J H, Woerner B D. Position location using wireless communications on highways of the future[J].IEEE Comm. Mag.1996, 34(10):33-41[2]Caffery J, Stuber L. Overview of radiolocation in CDMA cellular systems. IEEE Comm. Mag.,1998, 36(4): 38-45.[3]Wylie M, Holtzmann J. The NLOS-line of sight problem in mobile location estimation. In: IEEE International Conference on Universal Personal Communications, Cambridge, 1996: 827-831.[4]Caffery J. Wireless Location in CDMA Cellular Radio Systems. Boston: Kluwer Academic Publishers, 2000, Chap. 7.[5]Caffery J, Stuber L. Subscriber location in CDMA cellular networks[J].IEEE Trans. on Vehicular Technology.1998, 47(2):406-415[6]田孝华,廖桂生.一种有效减小非视距传播影响的TOA定位方法.电子学报,2003,3l(9):63-66.[7]Ertel R, Cardieri P, Sowerby K W, Rappaport T S, Reed J H. Overview of spatial channel models for antenna array communication systems. IEEE Personal Communications, 1998, 5(1): 10-22.[8]Parsons J. The Mobile Radio Propagation Channel. New Jersey: Halstcd Press, 1992, Chaps 5,6. ［9］袁亚湘,孙文瑜.最优化理论与方法.北京:科学出版社,2001,第4-7章. -
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