基于训练序列的SC-FDE系统符号同步改进算法

针对单载波频域均衡系统的同步问题,采用不同的训练序列结构,提出两种新的定时测度计算方法,既避免SchmidlCox算法的峰值平台现象,又抑制Minn算法大量旁瓣的产生。仿真结果表明,无论在多径信道还是低信噪比下,改进同步算法具有更低的均方误差。而且第二种定时测度方法既简化计算又保持良好的同步性能,方便在工程实现中缩短定时所需的时间。

Based on Training Sequence Improved Symbol Timing Synchronization Algorithm for SC-FDE System

In view of synchronization problems in the single carrier frequency domain equalization system, two new timing metric calculation methods are proposed on the basis of the different training sequence structure, which avoid the phenomenon of the timing metric plateau of Schmidl & Cox algorithm and suppress that of redundant peaks of Minn algorithm. Simulation results show that the improved synchronization algorithms have a lower Mean Square Error (MSE) in both the multi-path channels and low SNR environment. Moreover, a second timing metric calculation method not only simplifies the calculation and keeps a good synchronization performance, it is easy to shorten the needed time in the project implementation.