非视距环境下单站定位的伪目标动态可行域约束法  

Pseudo-Target Dynamic Feasible Region Constraint Location Method Using Single Observer in NLOS Environment

作　　者：范丹丹[1] 张立志[1] 黄开枝[1] 金梁[1] 

机构地区：[1]解放军信息工程大学,河南郑州450002

出　　处：《电子学报》2008年第10期2040-2043,共4页Acta Electronica Sinica

基　　金：新世纪优秀人才支持计划;国家863项目(No.2007AA01Z434)

摘　　要：针对非视距环境下多站定位方法需要资源量大、成本高且定位精度受非视距传播影响大等问题,本文提出了单站定位的伪目标动态可行域约束法.该方法将目标周围的散射体看作伪目标,利用单个机动观测站测量伪目标信号的来波方向角和方向角变化率,得到较精确的伪目标坐标后,根据伪目标与真实目标间的位置关系构造可行域,在可行域内进行最优化求解,消除非视距引起的误差,得到真实目标位置的估计值.伪目标动态可行域约束法把通常认为是不利的多径信号转化为有利因素.仿真实验证明:该方法在对目标连续数次采样测量后,即可以快速有效地抑制定位误差.A location method aiming at suppressing NLOS errors in cellular networks using single observer is proposed, which is named by pseudo-target dynamic feasible region constraint method. The method needs less resource and cost than traditional multi-base-stations location methods. The scatters around the target are regarded as pseudo-targets. AOA and the changing rate of AOA of pseudo-targets are measured to get the location of pseudo-targets. Then the feasible region of real target is constructed according to the location of pseudo-targets and the geometrical relationship between real targets and pseudo-targets,in which the optimization methods are applied to estimate the location of real target and deal with the NLOS errors.Pseudo-target dynamic feasible region constraint method converts multi-path signals, usually regarded as harmful factors, to advantage factors. As proved in simulation experiment, the proposed method can depress the location errors effectively and rapidly.

关 键 词：非视距 方向角 方向角变化率 可行域 优化处理 

分 类 号：TN95[电子电信—信号与信息处理]