摘要
本文提出了一种带预处理的多用户检测器.其预处理器是通过二进制二次规划问题的全局最优性条件得到的.本文的预处理器只用很小的计算量就可以判断出大部分用户的信息码,而且可以保证通过预处理得到的部分用户的信息码与最佳多用户检测得到的结果相同.因为由预处理得到的用户的信息码已经是全局最优的,所以我们就可以将其从原多用户检测问题中剔除,进而得到一个相对小规模的多用户检测问题.与原问题相比,这个小规模的多用户检测问题的多址干扰减小了,然后可以用一些常用的多用户检测器来求解这个小规模的多用户检测问题.
A novel multiuser detector with pretreater is presented in this paper,which pretreater is obtained from global optimality conditions for quadratic optimization with binary constraints, The pretreater mentioned in this paper can calculate most user information sequences by low computational complexity and assure that the results obtained from pretreater are the same as that of optimum multiuser detection. Since the user information sequences obtained from pretreater have been global optimization, we can reject them from original multiuser detector and then a relative small scale multiuser detector can be obtained. Compared with the original one, the multi-access interference of small scale multiuser detector is reduced. As a result, we can solve this small scale multiuser detection by some common multiuser detector.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第10期1860-1862,共3页
Acta Electronica Sinica
基金
国家973重点基础研究发展规划项目(No.G1999032805)
关键词
多用户检测
多址干扰
远近效应
码分多址
multiuser detection
multi-access interference
near-far problem
Code-division multiple access
