摘要
通过对WCDMA小区搜索算法过程进行研究,分析传统最大似然算法在时隙同步中存在的不足,给出基于频偏补偿和时隙同步相结合的时隙同步方案;采用基于快速哈达码变换的帧同步算法,快速准确实现小区主扰码组的识别。通过WCDMA实时处理系统,验证算法在时隙同步过程中能够有效克服系统频偏带来的同步误差,并最终实时实现小区搜索。
Algorithm for slot synchronization of cell searching in WCDMA is summarized in this paper. The deficiency of the maximum likelihood algorithm in slot synchronization is analyzed and the effect of frequency offset is fully considered. A kind of slot synchronization scheme based on PSC searching associated with frequency offset compensation is designed. FHT algorithm is employed in frame synchronization which reduces the computation largely and determines the primary scramb- ling code group faster. By means of real-time processing of the WCDMA system, the result reveals that the algorithm over- comes system frequency offset successfully and gets real-time implementation of cell searching.
出处
《数字通信》
2013年第1期22-26,39,共6页
Digital Communications and Networks
基金
重庆市教委科研项目(KJ110514)
关键词
小区搜索
时隙同步
帧同步
频偏补偿
快速哈达码变换
cell searching
slot synchronization
frame synchronization
frequency offset compensation
fast hadamard transformation
