相位扩谱序列的设计准则及该直扩多址系统的性能研究  

Design Criterion of Phase Spreading Sequences and Performance of DS/SSMA Communications

作　　者：仰枫帆[1] 梁树雄[2] 毕光国[3] 

机构地区：[1]南京航空航天大学,南京210016 [2]香港城市大学 [3]东南大学,南京210096

出　　处：《电子学报》2001年第1期136-139,共4页Acta Electronica Sinica

摘　　要：本文提出了一种基于连续相位调制 (CPM)并用于直接序列扩频多址 (DS/SSMA)的新型相位扩谱序列(PSS) ,以及它的最佳设计准则 .依据该准则并在调制指数为 0 5的连续相频键控 (CPFSK)条件下 ,通过穷尽搜索法得到了含有若干种不同周期长度的相位扩谱序列的集合 .同时在瑞利衰落信道条件下 ,作者对采用相位扩谱序列的DS/SSMA系统的性能进行了研究 。In this paper we propose a novel kind of phase spreading sequence (PSS) for direct sequence spread spectrum multiple access (DS/SSMA) with continuous phase modulation (CPM),and the optimal design criterion of PSS is obtained.Several sets with PSSs of various periodic lengths under the condition of continuous phase frequency shift keying (CPFSK) of modulation index h =0.5 are constructed by exhaustive search based on this optimal criterion.The performances of PSS DS/SSMA system in Rayleigh fading channel are in vestigated by theoretical analysis and numerical simulations.Finally,the comparisons between the performances of the systems with PSSs and the traditional PN sequence under the same conditions are also made.

关 键 词：相位扩谱序列 直接序列扩频多址 连续相位调制 瑞利衰落信道 

分 类 号：TN914.42[电子电信—通信与信息系统] TN911[电子电信—信息与通信工程]