判决反馈解相关多用户DS-SSMA信号检测器的研究

On Decorrelating Mulfiuser Signal Detectors with Decision Feedback for DS-SSMA Channels

直接序列扩频多址(DS-SSMA)通信系统的最大缺点在于存在远近效应(Near-Far Effect)和多址干扰(Multiuser Interference),它们影响了通信系统的稳定性、系统容量及应用范围.本文提出一种新的多用户信号检测器——判决反馈解相关检测器,在线性信道条件下,此检测器能有效地消除多址信号间的相互干扰,且具有较低的算法复杂度.计算机模拟结果验证了文中的理论分析.

The main shortcomings of direct sequence spread-spectrum multiple-access (DS-SSMA) communication systems are the Near-Far effect and multiaccess interferences, which impair the stability, capacity and application areas of the communication systems. In this paper, we propose a new kind of multiuser detector——decorrelating detector with decision feedback. In linear channels,this detector can eliminate the multiaccess interferences with low complexity. Computer simulations verify the theoretical analysis in this paper.