基于最小二乘法的TD-LTE传播模型校正研究

Study on TD-LTE propagation model adjustment based on least squares

基于线性最小二乘法,采用经典的SPM模型,在现有TD-LTE系统的传播模型——COST231-Hata模型的基础上,根据上海市热点地区实测所得的数据进行模型校正和改进,通过校正得到SPM模型的新的模型参数。将新的参数模型与实测数据进行仿真对比和误差分析,看出新的参数模型预测的数据和实测数据更为接近,校正后的误差也在可接受的参考标准误差范围内,校正后SPM模型与当地的环境相匹配。最后给出了校正结果,为TD-LTE网络规划奠定了一定的理论基础,同时为运营商采用无线网络规划软件进行基站的覆盖范围预测提供更为准确的参考模型。

Based on least squares, on the basis of the existing propagation model of TD-LTE system COST231- Hata model, this paper uses classical SPM model for model adjustment and improvement in accordance with the measurement data in hot spots of Shanghai. Through the simulation ,we can see that the data we get by using the new model parameters is more closer to measured and the error is within the acceptable range of error reference, so the adjustment model can match with the local environment well. Finally, conclusions are given, offering the theoretical references and a more accurate reference model for TD-LTE network planning for the opertors .