城市建筑对移动通信信号多用户检测的影响

Urban architecture's influence to multiuser detection of mobile communication signals

分析城市建筑的结构、高度和密度对移动通信信号多用户检测的影响。在蜂窝移动通信系统中,当城市环境传播模型变化致使信号处于深衰落时,最小均方误差(MMSE)检测器经常失去对信号的相位跟踪。本文提出了一种次优化子空间盲MMSE检测算法,运用目标用户特征波形和辅助向量,对信号相位进行去耦处理,使盲MMSE检测器具有次优化低复杂性的结构和算法,并且适合于城市衰落信道。

The problem of urban architecture＇s influence to multiuser detection of mobile communication signals is considered. In the cellular mobile communication systems, it is noted that the minimum-mean-square-error （MMSE） detector often loses phase to lock desired signal when the desired signal dips into a deep fade made by variety of transmission models in urban environment. The major contribution of this paper is to propose a suboptimal blind MMSE detector with the subspace-bascd that is incorporated the desired user＇s signature waveforrn and the auxiliary vector to make it low-complexity. It decouples the signal phase, and fits to realistic urban fading channels.