基于双正交复序列的高效扩频调制方法  

High efficiency spreading spectrum modulation based on double orthogonal complex sequences

作　　者：史小红[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《中国工程科学》2012年第3期108-112,共5页Strategic Study of CAE

基　　金：江苏省产学研联合创新资金资助项目(BY2009149)

摘　　要：提出了一种采用双正交复序列的高效扩频调制与解调方法(DoCS)。输入数据比特流被分割为长度为M的组,每组的M比特作为输入码字,从2M-2个长度为L的DoCS序列中选择一条序列进行发送,被选中的序列以QPSK方式调制在载波上,实现扩频通信。文中还提出了一种前向相位校正(FPC)方法来解决该系统中收发两端的载波同步问题。This paper presents a kind of high efficiency spreading spectrum modulation scheme using double orthogonal complex sequences （DoCS）. In this scheme, input data bit - stream is split into many groups with length M. Each group is then mapped into a word of width M and then utilized to select one sequence from 2M -2 DoCS sequences each with length L. After that, the selected sequence is modulated on carrier in QPSK（ quadrature phase shift keying） mode. In addition, a novel method named forward phase correction （FPC） is put forward for carrier recovery.

关 键 词：调制与解调技术 高效扩频调制 前向相位校正 双正交码 

分 类 号：TN911.3[电子电信—通信与信息系统]