无线传感器网络基于测距的节点定位算法研究

在无线传感器网络的各种应用问题中，节点的位置信息是很重要的。本文利用matlab对目标定位的基本测距算法RSSI进行仿真，得到了距离的估计值，并对其做了误差分析，得出了距离越小，误差也小，估计距离和实际距离越接近的结论；同时对DOA的MUSIC也进行了仿真，得到了信号相对于天线阵列的角度估计值，实验中取不同的snr值得到了不同的结果，其中信噪比SNR越大时得到的角度估计值越精确，并对两种基本测距算法进行比较。在得到距离估计值的基础上利用三边测量定位算法对监测事件进行仿真得出估计位置。

Research on Range-based Node Localization Algorithm of Wireless Sensor Networks

In various applications of wireless sensor networks issues, the node location information is very important. In this paper, the basic matlab on targeting RSSI localization algorithm simulation, obtained from the estimated value, and its doing error analysis, obtained from the smaller error is small, estimated and actual distance from the conclusions of the closer ; the same time, the MUSIC of DOA also carried out simulation to get a signal relative to the estimated value of the angle of the antenna array, the SNR for different experiments should be to different results, which snr larger angle obtained when the more accurate estimate, and compare two basic localization algorithm. In the distance estimates are based on the use of trilateration positioning algorithm estimates the monitoring position incident simulation shows.