智能天线中一种上行信号空间特征盲估计算法  

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

作　　者：周围[1] 林云[1] 张德民[1] 周正中[2] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065 [2]电子科技大学通信与信息工程学院,成都610054

出　　处：《北京邮电大学学报》2006年第6期32-35,57,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60572089);重庆邮电大学4G移动通信专项资金(A2004-70);重庆邮电大学青年教师基金(A2005-30)

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,证明了对其做特征分解可以得到各用户的空间特征.该算法不依赖信号调制类型,适用于任意加性高斯噪声.将它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.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.

关 键 词：智能天线 空间特征 高阶累积量 均匀直线阵 

分 类 号：TN929.5[电子电信—通信与信息系统]