面向高速移动通信系统的载波同步技术  

Carrier synchronization technology for high-speed mobile communication

作　　者：孙婷 SUN Ting(Shaanxi Post and Telecommunication College,Xianyang 712000,Shaanxi Province,China)

机构地区：[1]陕西邮电职业技术学院,陕西咸阳712000

出　　处：《信息技术》2021年第1期142-146,共5页Information Technology

摘　　要：针对高速移动通信系统大多普勒频偏和导频资源受限条件下的载频同步问题,提出了一种级联递进载波同步方法。首先利用数据帧首尾导频块估计与校正接收信号多普勒频率变化率;然后设计了基于多级自相关运算的高精度多普勒频偏估计模型;最后采用三阶锁相环跟踪剩余的多普勒变化率和频率偏移。仿真结果表明,该方法多普勒频率变化率校正满足载波同步需求,具有较高的多普勒频偏估计精度和较低的解调误码率。For the carrier frequency synchronization problem in high-speed mobile communication systems with large Doppler frequency offset and limited pilot resources,a cascade progressive carrier synchronization method is proposed.Firstly,the Doppler frequency change rate of the received signal is estimated and corrected by using the head and tail pilot blocks of the data frame.And then,a high-precision Doppler frequency offset estimation model based on multi-level autocorrelation is designed.Finally,the third-order PLL is used to track the remaining Doppler change rate and frequency offset.Simulation results show that the proposed method can meet the requirements of carrier synchronization,and has high Doppler frequency offset estimation accuracy and low demodulation bit error rate.

关 键 词：高速移动通信 载波同步 多普勒频偏 自相关 

分 类 号：TN911.23[电子电信—通信与信息系统]