超宽带系统中的迭代多用户检测算法  

Iterative multi-user detection algorithm for UWB communication systems

作　　者：刘文博[1] 邹传云[1] 张长春[1] 

机构地区：[1]桂林电子科技大学通信与信息工程系,广西桂林541004

出　　处：《系统工程与电子技术》2006年第8期1258-1261,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题(60472092)

摘　　要：针对超宽带通信系统的多用户检测问题,将Turbo理论中的迭代思想应用于跳时超宽带多址通信系统的多用户检测中,提出了一种基于Turbo码的多用户检测与跳时超宽带多址系统相结合的联合应用方案———迭代多用户检测器,并推导出了一种基于软干扰消除和最小均方误差(MMSE)滤波的低复杂度迭代多用户检测算法,仿真结果证明,在室内超宽带信道条件下,使用该算法的这种接收结构的性能显著优于传统接收机,经过几次迭代后多址干扰被有效地抑制,系统性能明显提高。To investigate the multi-user detection in UWB communication systems, the Turbo principle is brought into the multi-user detection in UWB multiple-access communication systems, and a scheme of joint detection of Turbo code and multi-user detection in TH-UWB multiple access communication system-iterative （Turbo） multi-user detector is proposed. A low complexity implementation is presented. The implementation is based on the soft interference cancellation and minimum mean-squared error （MMSE） filter. The performance characteristic of the low-complexity implementation has been examined using simulations in UWB indoor channel. Our numerical results show that the new receiver significantly improves the system performance. Moreover, after little iteration, multiple access interference （MAI） is efficiently suppressed, and a performance better than traditional receiver is achieved.

关 键 词：超宽带 多用户检测 TURBO原理 多址干扰 干扰消除 

分 类 号：TN914.2[电子电信—通信与信息系统]