码索引调制与多进制扩频的分析比较  

Analysis and comparison of code index modulation and multi-ary spread spectrum

作　　者：冯胜 江治林 杨勤 郑鹤 葛利嘉 Feng Sheng;Jiang Zhilin;Yang Qin;Zheng He;Ge Lijia(Chongqing Key Laboratory of Mobile Communication Technology,Chongqing University of Past and Telecommunications,Chongqing 400065,China;Communication NCO Academy of Amy Engineering University,Chongqing 400035,China;Chongqing Lynchpin Electronic Technology Co.,Ltd.,Chongqing 400041,China)

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065 [2]陆军工程大学通信士官学校,重庆400035 [3]重庆临菲电子科技有限公司,重庆400041

出　　处：《电子技术应用》2018年第12期85-88,92,共5页Application of Electronic Technique

基　　金：国家自然科学基金项目(61271251);重庆市社会事业与民生保障科技创新专项项目(cstc2017shmsA40002)

摘　　要：在当今抗干扰通信中,扩频通信以抗干扰能力强、保密性能好的优点而获得了深入的研究。将对码索引调制技术和多进制扩频技术进行分析比较。码索引调制技术是基于直接序列扩频发展而来的,在发射端信息比特分别映射为伪随机(Pseudo Noise,PN)码的索引和调制符号,调制符号的同相部分和正交部分再分别选择激活的扩频码进行扩频,然后通过天线发射出去。多进制扩频技术与码索引调制技术不同的是:多进制扩频技术没有调制符号,只将激活的扩频码通过天线发射出去。介绍了这两种扩频技术的基本模型、扩频增益分析以及复杂度分析,仿真结果表明,码索引调制系统具有更高的频谱效率和抗干扰能力。In the current anti-jamming communication,the spread spectrum communication has been studied deeply with the advantages of strong anti-jamming ability and good security performance.In this paper,the code index modulation and multi-ary spread spectrum technology are analyzed and compared.Code index modulation technology is based on the development of direct sequence spread spectrum,in the transmitter information bits are mapped to the pseudo noise(PN)code index and the modulation symbol respectively.The in-phase and orthogonal parts of the modulation symbol select PN codes activated to spread spectrum,and then transmitted through an antenna.The difference between multi-ary spread spectrum technology and code index modulation technology is that the multi-ary spread spectrum technology does not have modulation symbols,and only sends out the activated spread spectrum code through the antenna.This paper will introduce the basic models,spread spectrum gain analysis and complexity analysis of the two kinds of spread spectrum technology.The simulation results show that the code index modulation system has higher spectral efficiency and anti-interference ability.

关 键 词：扩频通信 直接序列扩频 多进制扩频 码索引调制 

分 类 号：TN911.3[电子电信—通信与信息系统]