[1]王维新,吴镇扬,彭岳星,等.基于抵消干扰信号相关阵的DOA估计[J].东南大学学报(自然科学版),2004,34(3):301-304.[doi:10.3969/j.issn.1001-0505.2004.03.004]
　Wang Weixin,Wu Zhenyang,Peng Yuexing,et al.DOA estimation based on counteraction of interferences’ correlation matrices[J].Journal of Southeast University (Natural Science Edition),2004,34(3):301-304.[doi:10.3969/j.issn.1001-0505.2004.03.004]
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基于抵消干扰信号相关阵的DOA估计()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第3期
页码:
301-304
栏目:
信息与通信工程
出版日期:
2004-05-20

文章信息/Info

Title:
DOA estimation based on counteraction of interferences’ correlation matrices
作者:
王维新;  吴镇扬;  彭岳星;  刘陈
东南大学无线电工程系, 南京 210096
Author(s):
Wang Weixin;  Wu Zhenyang;  Peng Yuexing;  Liu Chen
Department of Radio Engineering, Southeast University, Nanjing 210096, China
关键词:
波达方向估计;  智能天线;  空时信号处理
Keywords:
DOA estimation;  smart antenna;  space-time signal processing
分类号:
TN911.7
DOI:
10.3969/j.issn.1001-0505.2004.03.004
摘要:
讨论了异步直接序列码分多址(DS-CDMA)系统中多用户环境下的波达方向(DOA)估计问题,针对路径总数大于天线阵元数这一问题,提出了一种有效的DOA估计模式.通过抵消干扰信号的相关阵,可方便地提取出感兴趣信息; 此时,采用传统的DOA估计算法即可逐次估计出各DOA信息.为改善系统性能,本文提出了2种改进措施:Mahalanobis变换法及矩阵点除算法.前者能够大幅度地提高估计精度,而后者则可避免特征值分解运算,大大降低算法复杂度.仿真实验验证了算法的有效性.
Abstract:
The DOA(direction of arrival)estimation for asynchronous DS-CDMA(direct sequence code division multiple access)systems in multi-user environments is discussed. An effective DOA estimation pattern is presented for the situation that the number of all the paths exceeds that of antenna array’s elements. Based on the counteraction of the correlation matrices of interferences, signals of interest(SOI)are conveniently extracted. In the meantime, DOA’s of each path can be resolved serially from the SOI using the conventional DOA estimation algorithms. Furthermore, two scenarios — Mahalanobis transform and element-wise division algorithm, which improve the system performances, are provided. The former improves the estimation accuracy and the latter decreases the complexity as eigenvalue decomposition can be avoided. Simulation results confirm the effectiveness of the algorithm.

参考文献/References:

[1] Godara L C.Application of antenna arrays to mobile communications,part II:beam-forming and direction-of-arrival considerations [J]. Proc IEEE,1997,85(8):1195-1245.
[2] Lei Z,Lim T J.Estimation of directions of arrival of multipath signal in CDMA systems [J]. IEEE Trans Commu, 2000,48(6):1022-1028.
[3] 王维新,彭岳星,刘陈,等.异步DS-CDMA系统中基于符号级相关阵的DOA估计 [J].通信学报,2003,25(3):50-57.
　 Wang Weixin,Peng Yuexing,Liu Chen,et al.DOA estimation based on symbol-rate correlation matrices for asynchronous DS-CDMA systems [J]. J China Inst Commu,2003,25(3):50-57.(in Chinese)
[4] Blanz J J,Papathanassiou A,Haardt M,et al.Smart antennas for combined DOA and joint channel estimation in time-slotted CDMA mobile radio systems with joint detection [J]. IEEE Trans Veh Tech, 2000,49(3):293-306.
[5] Naguib A F,Paulraj A.Recursive adaptive beamforming for wireless CDMA [A].In:IEEE Intl Conf Gateway to Globalization [C].Seattle,1995.1515-1519.
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备注/Memo

备注/Memo:
基金项目: 国家高技术研究发展计划(863计划)资助项目(2001AA123015).
作者简介: 王维新(1975—),男,博士生; 吴镇扬(联系人),男,教授,博士生导师, zhenyang@seu.edu.cn.
更新日期/Last Update: 2004-05-20