Advanced Search
Volume 28 Issue 6
Jun.  2006
Turn off MathJax
Article Contents
Hu Bing, Li Ping-an, Yu Bian-zhang. Blind Space-Time Channel Estimation and Multiuser Detection for Asynchronous DS-CDMA System[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1101-1105.
Citation: Hu Bing, Li Ping-an, Yu Bian-zhang. Blind Space-Time Channel Estimation and Multiuser Detection for Asynchronous DS-CDMA System[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1101-1105.

Blind Space-Time Channel Estimation and Multiuser Detection for Asynchronous DS-CDMA System

  • Received Date: 2004-10-25
  • Rev Recd Date: 2005-04-18
  • Publish Date: 2006-06-19
  • The blind space-time channel estimation and multiuser detection algorithm for asynchronous DS-CDMA system in frequency selective Rayleigh fading channel are presented. By investigating the code space of the multipath signals and the data vector space, the noise-subspace-based approach is used to perform blind channel parameter estimation in the asynchronous DS-CDMA system. The method exploits not only the characteristics of multipath propagation but also the characteristics of timing-offsets which may occur in the receiver, to facilitate the application of a blind linear filter-optimization technique to robust interference suppression. A modified ULV updating algorithm is applied to performing noise subspace tracking. The algorithm does not require rank estimation of the correlation matrix, and estimate directly the noise subspace without tracking the signal subspace. Furthermore, Linearly Constrained Minimum Variance (LCMV) blind space-time multiuser detection and its adaptive implementation based on Householder-transform constrained least-mean-square (HCLMS) algorithm is considered. Simulation results show the effectiveness of the proposed algorithms.
  • loading
  • Honig M L, Madhow U, Verd S. Blind adaptive multiuser detection[J].IEEE Trans. on Info. Theo.1995, 41(7):944-[2]Schodorf J S, Williams D B. Array processing techniques for multiuser detection[J].IEEE Trans. on Commun.1997, 45(11):1375-[3]Pados D A, Batalama S N. Joint space-time auxiliary-vector filtering for DS/CDMA systems with antenna arrays[J].IEEE Trans. on Commun.1999, 47(9):1406-[4]Wang X, Poor H V. Space-time multiuser detection in multipath CDMA channels[J].IEEE Trans. on Sig. Proc.1999, 47(9):2356-[5]Roy S. Subspace blind adaptive detection for multiuser CDMA[J].IEEE Trans. on Commun.2000, 48(1):169-[6]Chkeif A, Abed-Meraim K, Kawas-Kaleh G, Hua Y. Spatio-temporal blind adaptive multiuser detection[J].IEEE Trans.on Commun.2000, 48(5):729-[7]Wang X, Poor H V. Blind multiuser detection: a subspace approach[J].IEEE Trans. on Info. Theo.1998, 44(3):677-[8]Reynolds D, Wang X. Adaptive group-blind multiuser detection based on a new subspace tracking algorithm[J].IEEE Trans. on Commun.2001, 49(7):1135-[9]Liu H, Xu G. A subspace method for signature waveform estimation in synchronous CDMA system[J].IEEE Trans. on Commun.1996, 44(10):1346-[10]Bensley S E, Aazhang B. Subspace-based channel estimation for code division multiple access communication systems[J].IEEE Trans. on Commun.1996, 44(8):1009-[11]Li X, Fan H. Blind channel identification: subspace tracking method without rank estimation[J].IEEE Trans. on Sig. Proc.2001, 49(10):2372-[12]Campos M L R, Werner S, Apolinrio J A. Constrained adaptation algorithms employing Householder transformation[J].IEEE Trans. on Sig. Proc.2002, 50(9):2187-[13]Luo F L, Unbehauen R. A minor subspace analysis algorithm[J].IEEE Trans. on Neural Networks.1997, 8(5):1149-[14]Frost III O L. An algorithm for linearly constrained adaptive array processing[J].Proc. IEEE.1972, 60(8):926-
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (2452) PDF downloads(711) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return