LTE小区搜索中循环前缀类型判决和辅同步信号检测算法的改进  

Improvement of CP type decision and SSS detection algorithm in cell search for LTE system

作　　者：林雁[1] 乐光新[1] 尹长川[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《吉林大学学报（工学版）》2012年第2期499-504,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(60472070;60672123);高等学校博士学科点专项科研基金项目(20050013005)

摘　　要：提出了一种LTE系统小区搜索中循环前缀类型判决和辅同步信号检测的改进算法。基于滑动窗,利用接收信号的序列相关和门限值判断循环前缀类型,避免循环前缀类型的盲检测;利用辅同步信号的偶数序列相关检测小区组标识号,在此基础上利用奇数序列验证检测结果,避免偶数序列和奇数序列的盲检测。仿真结果表明,本文算法在保证检测性能的同时降低了计算复杂度,提高了小区搜索的有效性,非常适合实际系统应用。An improved Cyclic Prefix （CP） type decision and Secondary Synchronization Signal （SSS） detection algorithm in cell search for Long Term Evolution （LTE） system is proposed. To avoid CP type blind detection, sliding window correlation detection on receiving signals is adopted to decide CP type based on a pre-defined threshold. Instead of blind detection toward even-numbered signals and odd-numbered signals of SSS, the even-numbered signals are utilized to correlation detection first; then the odd-numbered signals are used to further verify the results detected by even-numbered signals. Simulation results show that the proposed algorithm effectively reduces the computational complexity without the diction performance degradation and is very suitable for application.

关 键 词：通信技术 主同步信号 辅同步信号 循环前缀 滑动窗 

分 类 号：TN929.5[电子电信—通信与信息系统]