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为了降低待定位节点在定位单元的边缘定位误差,设计了一种四边形区域定位算法。首先根据待定位节点在定位单元的不同位置,分别采用定位单元内部定位机制和定位单元外部定位机制,然后引入向量相近度来辅助寻找距离未知节点最近的参考样本点。试验结果表明,该算法可降低50%的定位误差,随着锚节点数的增加,定位精度逐渐增加且最终趋于稳定,解决了待定位节点的定位误差问题。
In order to reduce the positioning error of the node to be positioned on the edge of the positioning unit, a quadrilateral region positioning algorithm is designed. First, according to the location of the node to be located in different positions of the positioning unit, the internal positioning mechanism of the positioning unit and the external positioning mechanism of the positioning unit are respectively used, and then the vector proximity is introduced to assist in finding the reference sample point closest to the unknown node. Experimental results show that this algorithm can reduce the positioning error by 50%. As the number of anchor nodes increases, the positioning accuracy gradually increases and eventually stabilizes, which solves the positioning error of the node to be located.