基于CAZAC序列的水声通信技术研究  

CAZAC Sequence-Based Underwater Acoustic Communication Technology Research

作　　者：杜利刚[1] 杨利[1] 苏建才[1] 

机构地区：[1]中国电子科技集团公司第20研究所通信事业部,陕西西安710068

出　　处：《电子科技》2013年第5期142-145,共4页Electronic Science and Technology

摘　　要：针对CI/OFDM系统对同步的敏感要求,提出了一种基于CAZAC序列的时频同步算法。该算法不仅可以实现定时同步,还可利用定时同步的相关结果和循环相关的原理实现小数倍频偏和整数倍频偏的估计与补偿。仿真和实验结果表明,在水声信道下,该算法具有良好的时频同步性能。In view of the fact that the CI/OFDM system is sensitive to synchronization, this paper puts forward a time and frequency synchronization algorithm based on CAZAC sequence. The time offset estimation and carrier frequency offset estimation can be achieved by this algorithm. Simultaneously, the fractional part and integral part of carrier offset estimation can be respectively obtained by the correlation result of time offset estimation and cyclic corre-lation principle. The simulation and experimental results show that in the underwater acoustic channel, the algorithm has a better time-frequency synchronization performance.

关 键 词：CI OFDM CAZAC 频偏估计 

分 类 号：TN929.3[电子电信—通信与信息系统]