中文摘要：

该文考虑了协同中继系统中的多时偏和多频偏估计问题,提出了一种基于恒幅零自相关基础序列的同步序列,进而提出了相应的多时偏和多频偏估计算法,相关的定时与频偏估计算法只需要做简单的自相关和互相关运算就可以获得良好的估计性能。仿真结果表明,所提出的同步序列和同步算法在协同中继系统中可以取得满意的系统性能。

英文摘要：

The estimation of multiple timing offsets and multiple frequency offsets in cooperative relay system is investigated.A synchronization sequence based on constant amplitude zero auto-correlation sequence is constructed.Furthermore,the corresponding synchronization algorithms are proposed,which only need auto-correlation and cross-correlation operations.Simulation results show that the proposed preamble and synchronization algorithms can achieve satisfactory performance in cooperative relay system.