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小区搜索是WCDMA物理层关键技术之一 ,其中同步序列 ,即主同步码和次级同步码的选择对于小区搜索的性能有着密切的影响。本文简单介绍了WCD MA的物理信道、扰码分配及小区搜索的具体实现过程。重点讨论了主同步码采用何种序列才能在保持其良好的非周期自、互相关性的基础上 ,最大程度地降低小区搜索的复杂性。本文分三种序列 (分层序列、Golay序列、分层Golay序列 )来进行具体比较分析 ,并对分层Golay序列进行了仿真 ,最后得出了研究结论。
Cell search is one of the key technologies of the WCDMA physical layer. The synchronization sequences, that is, the selection of the primary and secondary synchronization codes, have a close impact on the performance of the cell search. This article briefly introduced the WCD MA physical channel, scrambling code allocation and cell search of the specific implementation process. It focuses on the sequence of the primary synchronization code to minimize the complexity of cell search while maintaining its good aperiodic and cross-correlation. This article is divided into three sequences (hierarchical sequence, Golay sequence, hierarchical Golay sequence) to conduct a specific comparative analysis, and the layered Golay sequence simulation, and finally draw the conclusion.