基于CW测试的改进Lee室内模型的研究  

Research on Improved Lee Indoor Model Based on CW Test

作　　者：严天峰[1,2,3] 魏楠 许富馨 李帅 王逸轩 YAN Tian-feng;WEI Nan;XU Fu-xin;LI Shuai;WANG Yi-xuan(School of Electronin and Information Engineering,Lanzhou Jiao to ng University,Lanzhou 730070,China;Radio Monitoring and Technology Centeo of Positioning Industry of Gansu Province,Lanzhou 730070,China;High-Precision Positioning Technology Compass Engineering Laboratory of Gansu Province,Lanzhou 730070,China)

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070 [2]甘肃省无线电监测及定位行业技术中心,甘肃兰州730070 [3]甘肃省高精度北斗定位技术工程实验室,甘肃兰州730070

出　　处：《测控技术》2019年第8期103-107,共5页Measurement & Control Technology

基　　金：兰州交通大学校青年基金(2018003);甘肃省无线电监测定位创新团队资助项目(2017C-09)

摘　　要：针对室内模型在实际应用时预测路损与真实路损之间存在误差的问题,提出了适应穿墙场景的改进模型。该模型以Lee提出的经验模型为理论基础,建立真实室内结构的平面模型,通过发射恒定功率,对不同频点的频率信号,变换接收天线位置得到测试结果,即利用CW(Continuous Wave)测试的方式进行了多种场景的实际测试。采用平滑样条和线性拟合的方法对理论模型做出了验证和优化。仿真结果表明,改进的模型减小了与实际测量损耗的误差,实测值和改进模型的预测值之间的均方根误差小于1.5dB。In order to solve the problem about the error between predicted path loss and true path loss in practical application of the indoor model,an improved model which adapts to the situation of passing walls is proposed.The empirical model proposed by Lee is used as theoretical model.A planar model based on the actual indoor structure is established.By transmitting a certain power,the test results are obtained by changing the position of the receiving antenna for frequency signals at different frequencies,that is,an actual test of various scenes is carried out by using the CW test.The theoretical model is verified and optimized by the method of smoothing spline and linear fitting.The simulation results show that the improved model reduces the error with the actual measurement loss,and the mean square root error between the measured value and the predicted value of the improved model is less than 1.5 dB.

关 键 词：室内模型 CW测试 平滑样条 线性拟合 

分 类 号：TN011[电子电信—物理电子学] TP306[自动化与计算机技术—计算机系统结构]