WCDMA第三方探测系统目标信号快速捕获算法  

Targeted Signal Fast Acquisition Algorithm in Third-party Detection System in WCDMA

作　　者：田益[1] 田增山[1] 

机构地区：[1]重庆邮电大学无线定位与空间测量研究所,重庆400065

出　　处：《电视技术》2013年第5期150-154,共5页Video Engineering

基　　金：国家科技重大专项(2011ZX03006-003)

摘　　要：针对第三方探测系统对WCDMA系统中上行PRACH捕获的实时性要求,分析传统前缀同步算法的不足,设计了一种基于能量累加和最大似然相结合的前缀快速捕获算法,并根据消息的帧结构特点设计了一种基于控制部分的频偏估计算法。快速捕获和频偏估计共同构成第三方探测系统目标信号快速捕获算法,经实测数据验证,该算法能够快速、准确地对目标手机用户RACH信息进行捕获和解码。According to the real-time requirements of third-party detection systems capturing uplink RACH in WCDMA system, the deficiency of tradi- tional algorithm is analyzed and a kind of fast capturing preamble algorithm is designed that combining energy accumulation and maximum likelihood. Ai- ming at the feature of message frame structure, a kind of frequency offset estimation algorithm based on the control part in PRACH message is designed. The targeted identification acquirement algorithm is made up of the algorithm of fast capturing preamble and frequency offset estimation algorithm based on the control part in PRACH message. Real data validation shows that this algorithm can capture and decode the PRACH message of targeted user quickly and accurately.

关 键 词：能量累加 快速捕获前缀 频偏 探测 

分 类 号：TN929.53[电子电信—通信与信息系统]