北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2006, Vol. 29 ›› Issue (6): 32-35.doi: 10.13190/jbupt.200606.32.236

• 论文 • 上一篇    下一篇

智能天线中一种上行信号空间特征盲估计算法

周围1,2,林云1,张德民1,周正中2   

  1. 1. 重庆邮电大学 移动通信技术重点实验室,重庆 400065; 2. 成都电子科技大学 通信与信息学院,成都 610054
  • 收稿日期:2005-06-10 修回日期:1900-01-01 出版日期:2006-12-30 发布日期:2006-12-30
  • 通讯作者: 周围

A Blind Estimation Algorithm for Spatial Signature of Uplink Signals in Smart Antenna

ZHOU Wei1,2, LIN Yun1, ZHANG De-min1, ZHOU Zheng-zhong2   

  1. 1. Key Lab of Mobile Communications, Chongqing University of Posts and Telecommunications, Chongqing 400065,China;
    2. School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2005-06-10 Revised:1900-01-01 Online:2006-12-30 Published:2006-12-30
  • Contact: ZHOU Wei

摘要:

以均匀直线阵为基础,提出了一种全盲的上行信号空间特征估计算法。该算法利用阵列输出四阶累积量构造了一种空间特征矩阵,证明了对其作特征分解可以得到各用户的空间特征。该算法不依赖于信号调制类型,可适用于任意加性高斯噪声。将其用于相干多径环境下多用户信号空间特征的估计,研究了不同快拍数和信噪比下的标准估计偏差,说明了算法的有效性和鲁棒性。

关键词: 智能天线, 空间特征, 高阶累积量, 均匀直线阵

Abstract:

Based on uniform linear array, a blind estimating algorithm for spatial signature of uplink signals was presented. Using the fourth order cumulant of array output, a spatial-signature-matrix was constructed with the algorithm. It was proved that the spatial signature of each user can be obtained via decomposition of the spatial-signature-matrix. The algorithm is not dependent upon the modulation type of signal, and can be employed to additive arbitrary Gaussian noise. Applying it to estimate spatial signature of multi-user with coherent multi-path, the standard estimation deviations at different snapshots and signal-to-noise-ratio (SNR) were studied. The results confirm the availability and robustness of the algorithm.

Key words: smart antennas, spatial signature, high order cumulant, uniform linear array

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