摘要
提出了一种用于多基站协作传输多输入多输出(multiple input multiple output,MIMO)正交频分复用(orthogonal frequency division multiplexing,OFDM)系统的分布式多天线盲定时同步算法,利用接收信号的循环平稳特性,根据天线间时延导致的接收信号循环自相关函数谱峰的偏移量得到天线间的时延差值。采用一种基于滑动窗的检测算法,得到各天线时延值。仿真结果表明,该算法在无须额外同步数据的情况下,能有效地解决分布式定时问题。
A blind timing synchronization method using the cyclostationary feature of received signals of multiple bases cooperation multiple input multiple output（MIMO） orthogonal frequency division multiplexing（OFDM） transmission systems is proposed.Owing to the shift of the received signal cyclic autocorrelation peak,the delay difference among antennas is derived.A detection method based on sliding-window is designed to get the timing delay of each antenna.The simulation results prove this method can sovle the problem of ditributed multiple antennas timing synchronization with acceptable complexity.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第12期2506-2510,共5页
Systems Engineering and Electronics
基金
国际科技合作项目(2008DFA11700)资助课题
关键词
分布式定时
正交频分复用
协作多天线
盲定时
循环平稳
distributed timing
orthogonal frequency division multiplexing
cooperative multiple antenna
blind timing
cyclostationary
