WCDMA时隙同步算法的设计与实现

摘要

针对第三方手持探测系统对目标身份识别的需求,快速准确实现时隙同步是WCDMA探测系统正常工作的关键.首先通过对WCDMA时隙同步过程进行研究,指出传统时隙同步算法存在的缺陷,充分考虑系统频偏对时隙同步的影响,设计基于频偏补偿和时隙同步相结合的时隙同步方案.通过基于通用软件无线电平台处理系统,验证该算法能够克服较大系统频偏的影响,实现精确时隙同步.%In order to satisfy the technical requirements of third-party handhold detection system based WCDMA for targeted identification, achieving slot synchronization high-speed and accurate is the key. The slot synchronization algorithm 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. By means of real-time processing the WCDMA system based USRP, the result reveals that the algorithm overcomes system frequency offset successfully and implement slot synchronization precisely.