摘要
为多载波通信系统设计一种联合同步算法 ,能很好地解决多载波系统中的帧、符号和载波联合同步问题 .从理论角度简单地分析该算法的性能 ,并针对多径信道进行了仿真 .仿真显示该算法不仅提供高精度的频偏估计 ,而且提供足够精度的时间同步 ,从而有效地减少了时间同步估计误差和频偏所造成的符号间干扰 (ISI)和子信道间干扰 (ICI) .
In this paper, a combined synchronization method for OFDM system is proposed. It provides good synchronization for frame, symbol, and carrier. Theoretical analysis is made for the above method. In the case of multipath fading channel, the simulation result shows that the method provides not only accurate carrier synchronization but also high-resolution symbol synchronization. Consequently, intersymbol interference (ISI) and interchannel interference (ICI) from symbol timing error and frequency offset are effectively reduced.
出处
《应用科学学报》
CAS
CSCD
2001年第4期327-332,共6页
Journal of Applied Sciences
基金
国家自然科学基金资助 ( 6 0 0 72 0 13)
关键词
正交频分复用
时间同步
帧同步
符号同步
载波同步
联合同步算法
多载波通信系统
orthogonal frequency division multiplexing
time synchronization
frame synchronization
symbol synchronization
carrier synchronization
