关键词: 距离向量算法, 接收信号强度指示（RSSI）, 跳数, 平均跳距, 校正向量, Matlab仿真

Abstract: In view of the problem of low positioning accuracy in traditional DV-Hop algorithm, the algorithm is improved from three aspects. Firstly, it sets Received Signal Strength Indicator（RSSI） value which node receives, when the distance is one standard hop between node and transmitter. It uses RSSI value which node receives to set RSSI value ratio to correct hops. Secondly, the average hop distance of unknown nodes is considered from two cases to make estimated distance between unknown node and anchor node more accurate. Thirdly, it introduces correction vector to correct the estimate coordinates of the unknown node. Simulation results show that positioning precision of the improved algorithm is significantly higher than the traditional DV-Hop algorithm and the algorithm of literature[6] and stability also has certain ascend.

Key words: Distance Vector（DV）-Hop algorithm, Receive Signal Strength Indication（RSSI）, hop, average hop distance, correction vector, Matlab simulation