两种基于调制引入循环平稳的多用户系统盲检测研究

本文探讨了两种多用户系统的检测方法:第一种方法首先分别对各个用户的信道进行盲辨识,再进行多用户盲检测;第二种方法在收方利用频偏滤波(FRESH)的超强抗干扰能力,从收方混合多用户收信号中盲提取和盲分离出所需用户的收信号,再利用已辨识出的该用户的信道进行单用户盲检测。但这里的单用户检测不是普通的单用户检测,而是用了干扰抑制技术的新型检测,所以性能可以同多用户检测相当,克服了近远问题。

Two Blind Multiuser Detection Approaches Based on Modulation-Induced Cyclostationarity

In this paper, two detection approaches are discussed for the multiuser detection: one approach is to identify all the channels for all the users, then multiuser detection is performed; the other one is to identify the channels for the concerned user only, followed by signal separation using FRESH filtering, then the single-user detection is carried out by solving linear equations. The single-user detection is no longer the conventional one, but a novel interference-rejection technique applied, so that the performance is comparable to the multiuser counterpart, and the near-far problem is overcome.