一种宽带无线接入系统的小区搜索算法  

An Algorithm of Cell Search in Broadband Wireless Access Systems

作　　者：陈惠民[1] 顾琳[1] 金彦亮[1] 王勇[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2007年第4期344-347,共4页Journal of Shanghai University:Natural Science Edition

基　　金：上海市科委重点科技攻关资助项目(06dz15013);上海市重点学科建设资助项目(T0102)

摘　　要：该文提出一种新的基于OFDMA的宽带无线接入系统的小区搜索算法.该算法采用新的分级同步序列取代原有的前导序列(preamble),来完成符号定时、频偏估计和小区识别.分析了同步序列结构,给出了具体的小区搜索算法.仿真结果表明,在AWGN和TU信道下,该算法不仅增加了可识别小区数目,而且改善了原有前导训练序列的相关性能,提高了小区搜索的可靠性和有效性.A new algorithm of cell search in broadband wireless access systems based on OFDMA is proposed in the paper. With this algorithm, fast cell search can be achieved using the new hierarchical synchronous sequence instead of the original preamble to accomplish symbol timing, frequency offset estimation and cell ID detection. Synchronous sequence structure is analyzed, and the algorithm of cell search described. Simulation for AWGN channel and TU channel shows that the algorithm not only can increase the number of cell ID but also can improve performance of the preamble. Therefore, reliability and effectiveness of cell search are improved.

关 键 词：宽带无线接入系统 小区搜索 同步序列 前导序列 

分 类 号：TN911.5[电子电信—通信与信息系统]