基于正交信道的双M-ary扩频通信方案  

Scheme of Double Mary Spread-spectrum Communication Based on Orthogonal Channels

作　　者：曾志斌[1] 庄奕琪[1] 向新[2] 姚引娣[3] 

机构地区：[1]西安电子科技大学微电子学院宽禁带半导体材料与器件重点实验室,西安710071 [2]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071 [3]西安邮电学院通信工程系,西安710061

出　　处：《系统仿真学报》2011年第5期984-986,共3页Journal of System Simulation

基　　金：国家自然科学基金(60276028)

摘　　要：针对传统系统中伪码资源缺乏以及同步实现较困难等方面的问题,提出一种新的双M-ary扩频通信系统方案,该系统采用两条正交支路传输信息,其中在同相支路上采用M-ary双正交扩频调制,在正交支路上采用CPSK扩频调制。该方案能够利用信息自身扩频调制准确实现同步,不需要额外提供同步资源。仿真结果表明,它与传统M-ary扩频方案性能相一致,但在传输比特信息时,它只需约四分之一的传统M-ary扩频的条数,有效地节省了扩频码资源。To solve these problems that spread spectrum codes resource is lack and synchronization is difficult to realize in conventional M-ary spread spectrum system,a new double M-ary spread spectrum hybrid communication system utilizing orthogonal channel was proposed.The system adopts two orthogonal branches to transport information,that is,M-ary biorthogonal spread spectrum modulation in in-phase branch,and CPSK spread spectrum modulation in orthogonal branch.The system has the advantages which can achieve synchronization accurately and fleetly by itself,but rather offer additional synchronization resource.The simulation results demonstrate the system maintaining a comparable performance as the M-ary spread spectrum,but it needs only about quarter of spread spectrum codes of M-ary spread spectrum system,which saves source of spread spectrum codes effectively.

关 键 词：扩频通信 正交信道 同步 CPSK扩频 M-ary双正交 

分 类 号：TN914.42[电子电信—通信与信息系统]