摘要：

城市建筑物的结构、高度和密度会对蜂窝移动通信产生影响，在多径扩散信道中产生宽带和窄带干扰。为此，设计一种次优化的盲最小均方误差检测器。在抑制通信系统中宽带干扰(多址干扰和码间干扰)的同时，消除窄带通信系统产生的窄带干扰(包括正弦波信号、自回归信号、多速信号系统中的数字信号等)以及环境噪声，利用子空间分解技术和辅助向量来简化传统检测器。仿真结果证明，当信噪比为10 dB时，该检测器的误码率比传统检测器低约3 dB。

关键词: 码分多址, 多用户检测, 多址干扰, 码间干扰, 最小均方误差, 窄带干扰

Abstract:

The problem of Narrow Band Interference(NBI) and both Multiple Access Interference(MAI) and Intersymbol Interference(ISI) in dispersive channel of the cellular mobile communication under urban architecture’s influence is proposed, a technique for the simultaneous suppression of NBI, i.e., multitone interferers, autoregressive interferers and digital interferers, and both MAI and ISI, and environmental noise is considered. This technique is based on the suboptimal subspace blind Minimum Mean Square Error(MMSE) detector of multiuser detection with the auxiliary vector to make it low-complexity. It is seen that when SNR is 10 dB, BER of blind MMSE detector is lower than about 3 dB of the conventional ways’.

Key words: Code Division Multiple Access(CDMA), multiuser detection, Multiple Access Interference(MAI), Intersymbol Interference(ISI), Minimum Mean Square Error(MMSE), narrow-band interference

中图分类号: 

• TN911