中文摘要：

这篇文章介绍 downlink 为长期的进化(LTE ) 的起始的同步和房间鉴定算法第三产生(3G ) 活动通讯系统，它基于同步隧道(SCH ) 和房间特定的飞行员符号分别地。建议计划的特色是：它能通过 SCH 的 oversampling 改进频率同步的性能，它能由 modulating 支持很多目标房间在在内的二个符号上的一个房间特定的飞行员序列一个副框架，和它能保证房间鉴定性能由最大地联合频率域的比率微分跨关联。模拟证明建议计划在 3G LTE 有潜在的使用。

英文摘要：

This article presents downlink initial synchronization and cell identification algorithms for long term evolution （LTE） of third-generation （3G） mobile communication systems, which are based on synchronization channel （SCH） and cell specific pilot symbols, respectively. The key features of the proposed scheme are： it can improve performance of the frequency synchronization through oversampling of the SCH, it can support a large number of target cells by modulating a cell-specific pilot sequence over two symbols within a subframe, and it can guarantee cell identification performance by maximally ratio combining the frequency domain differential cross-correlation. Simulations show that the proposed scheme has a potential use in 3G LTE.