时频同步算法在高速环境下的性能分析

高速移动无线通信面临许多难题,信道快速时变以及多普勒扩展的存在,使得定时同步度量函数的峰值减小,频偏估计函数产生相位差,这都降低了同步估计的准确性。在经典时频同步算法的基础上,根据高速移动环境下信道的特点,分析常用时频算法的性能,并通过计算机仿真验证了常用时频同步算法在高速移动环境下性能分析的正确性。

PERFORMANCE ANALYSIS OF TIMING SYNCHRONIZATION ALGORITHM IN HIGH SPEED MOBILE ENVIRONMENT

There are many problems for wireless mobile communication in high speed mobile environment. The fast time-varying chan- nel and Doppler spread have the bad influence on the timing and frequency algorithm. They make the peak value of measurement func- tion decreases, and the frequency estimate function have the phase difference, which lead to bad performance. This paper theoretically analyzes the performance of timing and frequency algorithm on the basis of classical algorithms and the feature of channel in high speed environment. At last, the simulation results certificate the correct analysis of the classical algorithms in high speed mobile environment.