NB-IoT系统基于导频信道估计算法研究

摘要

NB-IoT(Narrow Band Internet of Things)是一种基于蜂窝的窄带物联网技术,该技术如今发展非常迅速,为了协助终端更好地解调出发射信号,在现有的LS算法和基于DFT的LS算法基础上进行改进,设计了基于阀值的变换域信道估计算法,并且通过MATLAB对以上三种算法的BER(误码率)进行仿真和验证,最终仿真结果显示改进算法的性能优于另外两种算法.%NB-IoT (Narrow Band Internet of Things) is a cellular-based narrowband networking technology,which is developing rapidly now.To assist the terminal in demodulating the transmitted signal better,the existing LS algorithm and the DFT-based LS algorithm are improved.A channel estimation algorithm which based on threshold is designed.The BER (bit error rate) of the above three algorithms are simulated and verified by MATLAB.The final result shows that the improved channel estimation performance is better than the other two algorithms.