摘要
CDMA通信系统本身存在着多径干扰、多址干扰等缺点,这将大大限制CDMA系统中的用户容量.为此,在深入分析了完备互补序列理论的基础上,提出了一种抗多径干扰的新方法———采用修正完备互补序列,利用其特性从接收机的相干输出中消除多径干扰的影响,并以4阶完备互补序列的一个子集为例根据加/去修正的原理设计了CDMA单用户系统,对系统的抗多径干扰性能进行了仿真,验证了采用修正完备互补序列较m序列抗多径干扰的优异特性.
Multipath interference and multi-access interference in CDMA systems are disadvantages to the user capability of a code division multiple access (CDMA) system. Based on the theory of complete complementary series,presented is a new kind of anti-multipath interference method:modified complete complementary codes.By use of the properties of a modified complete complementary series,it tries to cancel the effect of multipath interference.A sample CDMA single user system was designed according to the principle of adding and deleting dummy chips and taking a subset of 4-order complete complementary codes and the anti-multipath interference performance of the system was simulated.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2004年第5期666-669,共4页
Journal of Harbin Engineering University
基金
国防科学技术工业委员会基础研究基金资助项目(02J3.24).
