摘要
基于接收信号强度RSSI的测距技术,根据理论或经验信号传播模型将传播损耗转化为距离.但在实际环境中,无线电传播路径损耗使得定位过程中产生距离误差,通过分析引入对数模型法对RSSI进行修正,采用泰勒级数展开迭代法计算坐标位置,定位过程中节点间不增加通信开销,无需硬件扩展,通过仿真和实验证明该算法的优越性和可行性,提高了定位精度.
The path loss for radio-wave propagation is transformed into distance according to the theoretic or empirical model based on the range measurement of RSSI . In the actual environment the path loss re- sults in errors in the positioning process. By analyzing errors, RSSI is rectified by the introduction of the logarithmic model. The Taylor series iteration method is used to calculate the coordinate location. The localization process of nodes does not increase the communication costs and there is no need for hardware extensions. According to simulation and experiments , results reveal the feasibility and superiority of the algo- rithm, which has heightened the accuracy of estimates of the distance.
出处
《甘肃科学学报》
2013年第2期109-111,共3页
Journal of Gansu Sciences
