摘要
讨论了OFDM系统的帧同步算法,针对基于循环前缀的同步算法在强干扰信道中以及在极低信噪比条件下,无法实现精确同步的缺点,提出了一种基于PN序列的帧同步算法。仿真结果表明,基于PN序列的帧同步算法在极低信噪比条件下能够实现精确同步,同时也具有抗多径效应和抗强窄带干扰的能力。
In this paper an algorithm of symbol synchronization for OFDM is proposed based on PN sequences. First, the algorithm Of symbol synchronization based on cyclic prefix is discussed, and then its drawbacks are analyzed. The results of computer simulati on show that the new algorithm based on PN sequences can overcome the drawbacks of the algorithm based on cyclic prefix and get better synchronization in particular in the channel of strong interference and in the case of low SNR.
出处
《空军工程大学学报（自然科学版）》
CSCD
2003年第5期39-42,共4页
Journal of Air Force Engineering University(Natural Science Edition)
基金
军队科研基金资助项目
关键词
OFDM系统
循环前缀
PN序列
帧同步
OFDM systems
cyclic prefix
PN sequences
frame synchronization
