多载波DS CDMA并行干扰消除算法分析  

Parallel interference-cancellation algorithm for multi-carrier DS CDMA

作　　者：张援农[1] 徐国雄[2] 黄天锡[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]中原工学院电子信息学院,河南郑州450007

出　　处：《华中科技大学学报（自然科学版）》2005年第6期47-50,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：将频率分集合并技术与并行干扰抵消算法相结合,提出了多载波DSCDMA系统的并行干扰消除算法(FDC-PIC),并对这一算法的误码性能进行了计算机仿真.结果表明:FDC-PIC获得了明显优于相关接收的性能,且随着干扰消除级的增加,系统性能将得到进一步地改善,其中最初2级的干扰消除可获得最大的性能改善,但到第3级干扰消除,性能不再有明显的改善,表明2级FDC-PIC具有最佳的性能/复杂度.仿真结果表明:在具有相同干扰消除级数的情况下,基于软判决反馈的FDC-PIC性能上总优于硬判决反馈FDCPIC.Parallel interference cancellation was proposed for multi-carrier DS CDMA (which is termed FDC-PIC) by integrating frequency diversity combining with parallel interference canceling method. It was seen that the performance of FDC-PIC is superior to correlation reception of multi-carrier DS CDMA. With an increase in interference-canceling stages, the system showed its good performance further, especially in the initial second stage, but did a poor performance in the 3rd stage. Namely, 2-stage FDC-PIC showed its best performance/complexity trade-off. The simulation results also indicated that FDC-PIC with soft decision feed back outperforms the system with hard decision one when the stage numbers are the same.

关 键 词：多载波 直接序列码分多址 并行干扰消除 

分 类 号：TN911.4[电子电信—通信与信息系统]