LTE系统时频同步算法及其DSP实现

介绍了LTE—FDD系统主同步序列的产生，给出了一种基于主同步信道的时频同步算法，包括符号定时同步算法和频偏估计算法。定时同步算法引入了多径能量窗，并且根据LTE系统同步信道的特点，对多个同步信道上的相关值进行非相干合并，有效地提高了同步性能。对所给出的算法进行仿真，并采用DSP实现同步算法。仿真和实验结果表明，所给出的算法具有良好的性能，能够满足LTE系统对同步性能的要求。

Time and Frequency Synchronization Algorithms and Their DSP Implementations in LTE System

Primary Synchronization Sequence （PSS） in LTE-FDD system is introduced. Time and frequency synchronization algorithms based on primary synchronization channel （PSCH）, including symbol timing and frequency offset estimation algorithms are studied. Multi-path energy window is introduced into the timing synchronization algorithm, and the correlation values of multiple synchronization channels are combined. The performance of synchronization is effectively enhanced using the algorithms in this paper. Simulations about the algorithms have been done, which are implemented by DSP. Results of the simulations and experimentations indicate that the algorithms have good performance, which can meet the requirements of the LTE system.