| 引用本文: | 杨世海,周良柱.在非高斯信道下多用户检测的鲁棒算法.[J].国防科技大学学报,2000,22(6):83-86.[点击复制] |
| YANG Shihai,ZHOU Liangzhu.Robust Multiuser Detection in Non-Gaussian Channels[J].Journal of National University of Defense Technology,2000,22(6):83-86[点击复制] |
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| 在非高斯信道下多用户检测的鲁棒算法 |
| 杨世海, 周良柱 |
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(国防科技大学 电子科学与工程学院,湖南 长沙 410073)
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| 摘要: |
| 在无线通信中应用多用户检测技术可以有效去除多路径干扰（MAI）。实验证明，实际信道通常包含冲激噪声，从而是非高斯的。讨论了目前扩频通信（DS-SS）中应用于非高斯信道的自适应鲁棒的多用户检测技术，以前的研究大多存在两个缺点：一是需要对非高斯信道的模型有一个先验估计；二是计算较基于高斯信道的算法复杂的多。本文从传统的特征空间的自适应跟踪技术PASTd［1］，针对其误差模型对算法进行修改，提出了一种简易的鲁棒算法。经蒙特卡洛仿真证明，该方法在含冲激噪声信道中能显著提高信号子空间跟踪的精度。 |
| 关键词: 扩频通信 码分多址 多用户鲁棒检测 信号空间跟踪 |
| DOI： |
| 投稿日期：2000-07-05 |
| 基金项目: |
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| Robust Multiuser Detection in Non-Gaussian Channels |
| YANG Shihai, ZHOU Liangzhu |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In wireless system where multiuser detection techniques may be applied, the ambient channel noise is known through experimental measurements to be decidedly non-Gaussian. This paper consider the problem of adaptive robust detection of direct-sequence spread-spectrum(DS-SS) signal in the presence of unknown correlated SS interference and additive non-Gaussian noise. Many efforts have been made and most of them have two major problems:the first, explicit a priori knowledge of the underlying noise statistics is generally not available in a realistic scenario; second, computational complexity must be taken into consideration. From traditional subspace tracking techniques, we derive a robust method with low computational complexity. Analytical and simulation results show that the proposed robust techniques offer significant performance better than the normal subspace tracking methods in impulsive noise. |
| Keywords: spread spectrum communication CDMA robust multiuser detection signal subspace tracking |
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