Description: 蜂窝网络抑制非视距定位算法研究.详细介绍了几种基本的定位方法：圆周定位法（TOA, Time Of Arrival）、双曲线定位法（TDOA, Time Different Of Arrival）、角度测量值定位法（AOA, Angle Of Arrival）和混合定位法，并对这些方法进行了比较。
-Cellular networks inhibit non-line-location algorithms. Details the positioning of several basic methods: Circle location algorithm (TOA, Time Of Arrival), hyperbolic positioning method (TDOA, Time Different Of Arrival), the angle measurement positioning method ( AOA, Angle Of Arrival) and mixed-orientation law, and these methods were compared. Platform: |
Size: 28672 |
Author:gudeyi |
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Description: 针对基于双曲线定位的DV-Hop算法中误差项的异方差性引起的定位误差大的问题，提出了一种基于加权双曲线定位的DV-Hop改进算法。算法分析了基于双曲线定位的DV-Hop算法模型中误差项的异方差性，用加权最小二乘法对异方差性进行纠正，对加权最小二乘法中的权值矩阵进行了推导并得到与跳数相关的最佳权值矩阵，使得误差项满足同方差性，所得估计值更加接近最佳线性无偏估计。仿真实验结果表明，所提算法在节点定位精度上较现有的基于双曲线定位的DV-Hop算法都有一定提高。(Aiming at the problem that the heteroscedasticity of observation errors leads to low locating accuracy in DV-Hop algorithm based on hyperbolic positioning, this paper proposes an improved DV-Hop algorithm which based on weighted hyperbolic positioning. The algorithm analysis the heteroscedasticity of the error term in the model and takes advantage of weighted least square method which corrects heteroscedasticity straightforwardly. Then, the weight matrix related to least hops between nodes is deduced, the estimators thus obtained are more close to the best linear unbiased estimator. The simulation results show that the location performance of the improved algorithm is better than that of the exsiting DV-Hop algorithm which based on hyperbolic positioning.) Platform: |
Size: 2048 |
Author:helios~
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Description: 对比了基础dv-hop算法，和改进的2d-hyperbolic 方法，引进了权重因子，在很大程度上改进了定位精确度。(Compared with the basic DV hop algorithm and the improved 2D hyperbolic algorithm, the weight factor is introduced to improve the positioning accuracy to a large extent.) Platform: |
Size: 2048 |
Author:Summer825 |
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