1、 本科毕业论文（设计） 学院、系 电子信息工程学院 电子系 专业名称 电子信息科学与技术 年 级 2008 级 学生姓名 指导教师 2012 年 5 月 31 日 多用户检测技术研究 多用户检测多用户检测技术技术研究研究 摘要摘要：多用户检测是宽带CDMA通信系统中抗干扰的关键技术。多用户检测是综合考 虑同时占用某个信道的所有用户或某些用户，消除或减弱其它用户对任一用户的影响， 并同时检测出所有这些用户或某些用户的信息的一种信号检测方法。本文主要研究了 CDMA移动通信系统的各种多用户检测算法的原理和优缺点。首先介绍了多用户检测技 术的基本分类， 主要有线性多用户检测和非线性多用户检测两类，
2、前者包括解相关检测、 线性最小均方误差检测，后者则以干扰抵消多用户检测为主，又分为串行和并行干扰消 除多用户检测。然后对各类多用户检测技术的特点进行了分析比较。文中通过仿真比较 分析了传统检测器、串行干扰抵消检测器和解相关检测器等经典多用户检测器的误码率。 随着多用户检测技术的发展越来越成熟，其应用领域也不断扩大，多用户检测成为目前 研究的一个热点。 关键词关键词：多用户检测，串行干扰消除，并行干扰消除 RESEARCH ON MUTI-USER DETECTION TECHNIQUE Author: Hu Bo Tutor: Sun Kai Abstract: Multi-user dete
3、ction is an anti-interference key technology in broadband CDMA system. Multi-user detection is a method for signal detection; it overall evaluates all users or certain users who occupy some channels, other users to any users influence will be eliminated or weakened. In the meantime, information of a
4、ll users or certain users is detected. This article focuses on the principle and algorithm of Multiuser Detection (MUD) and discusses the main techniques available for data detection in wireless CDMA systems. MUD can be classified into two main parts: Linear MUD and Nonlinear MUD. Linear MUD include
5、s Decorrelating Detection and Minimum Mean-Square Error (MMSE) Linear MUD, while Nonlinear MUD includes Successive Interference Cancellation (SIC) and Parallel Interference Cancellation (PIC). In this paper, the pros and cons of recent and old techniques available in the literature are discussed. Th
6、e performances of BER of some typical conventional multi-user detectors, successive interference cancellation detector (SIC) and decorrelating detector are compared and analyzed through MATLAB simulation. With the multi-user detection technique becoming increasingly sophisticated, their applications have also expanded continuously, research of multi-user detection on the system become a hot topic at present. Key words: Multi-user detection (MUD),
