基于Gibbs采样的群盲多用户检测技术  

A group-blind multiuser detection technique based on Gibbs sampler

作　　者：吴莉莉[1] 黄晖[1] 保铮[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071

出　　处：《电波科学学报》2003年第4期363-366,共4页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.60172028);高等学校博士学科点专项科研基金(No.20010701008);教育部科学技术研究重点项目(No.01163)

摘　　要：多用户检测是第三代移动通信系统中的一项关键技术。研究存在邻近小区干扰时异步多径DS-CDMA信号的多用户检测问题。提出一种新颖的基于Gibbs采样的群盲多用户检测技术,它根据线性群盲解相关器的输出,利用Gibbs采样进行Bayes多用户检测。存在信道编码时,提出的检测器非常适合做Turbo多用户检测,仍然能够找到Bayes解。该方法具有简单易实现、检测性能好、应用范围广泛的优点。仿真实验证实了这一点。Multiuser detection is a key technique in the third generation mobile communications system. In this paper, the multiuser detection of asynchronous DS-CD-MA signal with unknown interference and multipath fading is studied. A novel group-blind multiuser detector based on Gibbs sampler is proposed, in which Gibbs sampler is employed to perform the Bayesian multiuser detection according to the linear group-blind decorrelator output. It is well suited for Turbo multiuser detection in a coded system and is capable of finding the Bayesian solution. The proposed detector has the advantages of low complexity, high performance and wide applications. Simulation results are presented to demonstrate its effectiveness.

关 键 词：GIBBS采样 群盲多用户检测 第三代移动通信 DS-CDMA Bayes检测 

分 类 号：TN929.533[电子电信—通信与信息系统]