小区搜索技术是WCDMA同步系统中的核心与关键技术。文中针对WCDMA系统三步小区搜索的特点,充分考虑了频差对初始小区搜索带来的影响,提出了优化的结构模型与实现算法,该模型结构简单,便于算法的灵活实现。文中对其性能进行了分析,得到了性能表达式,并通过仿真获得了算法所需的参数。 Cell search technology is the core and key technology in WCDMA synchronization system. In this paper, according to the characteristics of three-step cell search in WCDMA system, the impact of frequency difference on initial cell search is fully considered. An optimized structure model and algorithm are proposed. The proposed algorithm has a simple structure and facilitates the flexible implementation of the algorithm. In this paper, its performance is analyzed, the performance expression is obtained, and the required parameters of the algorithm are obtained by simulation.