SC-FDE系统中符号定时同步技术研究

Study of symbol timing synchronization in SC-FDE system

在SC-FDE(单载波频域均衡)系统中,符号同步的目的是确定接收端每个SC-FDE符号的起止时刻,即确定准确的FFT(Fast Fourier Transform)窗口位置。在对Schmidl&Cox、H.Minn及Serpedin3种符号定时同步算法进行深入研究的基础上,提出了一种改进的符号定时同步算法,并对其定时性能进行了验证。仿真结果表明,改进算法在SUI-3多径信道中具有较好的定时性能。

In SC-FDE （Single Carrier Frequency Domain Equalization） system,the purpose of symbol synchronization is to determine the sign of the beginning and end of each SC-FDE symbol in receiver,that is,to determine the precise loca- tion of the FFT （Fast Fourier Transform） window. In this paper, we proposed a modified algorithm based on the deep study of Schmidl ＆ Cox, H. Minns and Serpedin＇s symbol timing synchronization algorithm, and its performance was ver- ified, simulation results show that,the improved algorithm in SUI-3 multipath channel with good timing performance.