多步联合检测技术在SCDMA系统中的应用  

Application of multi-step joint detection in synchronous CDMA system

作　　者：于秀兰[1] 杨丰瑞[1] 

机构地区：[1]重庆邮电学院,重庆400065

出　　处：《信息技术》2005年第3期6-10,共5页Information Technology

摘　　要：同步CDMA系统接近满码道工作时,由于信噪比恶化,联合检测技术不能满足系统性能的要求。多步联合检测(MSJD)有效地解决了这个问题,大大提高了系统的性能。本文研究了多步联合检测技术,在多步联合检测算法的基础上提出了改进的并行多步联合检测算法,减小了系统的延时;并把天线的接收分集和多用户检测技术相结合,提高了多径衰落信道下的传输可靠性。When system loads are close to the spread factor, joint detection cann't reach the need of system performance because of a SNR degradation. And multi-step joint detection is proposed to overcome the problem. In the paper a improved parallel MSJD is presented to reduce system time delay, and then the multi-(user) detection is connected with antenna array in rayleigh channel to improve transmission reliability.

关 键 词：同步CDMA系统 信噪比恶化 多用户检测 联合检测 多步联合检测 

分 类 号：TN911.23[电子电信—通信与信息系统]