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一種多人多出DS/CDMA系統(tǒng)中的半盲多用戶檢測算法

王勇,  尤肖虎,  陳明,  程時昕

王勇, 尤肖虎, 陳明, 程時昕. 一種多人多出DS/CDMA系統(tǒng)中的半盲多用戶檢測算法[J]. 電子與信息學(xué)報, 2001, 23(9): 847-853.
引用本文: 王勇, 尤肖虎, 陳明, 程時昕. 一種多人多出DS/CDMA系統(tǒng)中的半盲多用戶檢測算法[J]. 電子與信息學(xué)報, 2001, 23(9): 847-853.
Wang Yong, You Xiaohu, Chen Ming, Cheng Shixin . A SEMIBLIND MULTIUSER DETECTION ALGORITHM IN MIMO DS/CDMA SYSTEMS[J]. Journal of Electronics & Information Technology, 2001, 23(9): 847-853.
Citation: Wang Yong, You Xiaohu, Chen Ming, Cheng Shixin . A SEMIBLIND MULTIUSER DETECTION ALGORITHM IN MIMO DS/CDMA SYSTEMS[J]. Journal of Electronics & Information Technology, 2001, 23(9): 847-853.

一種多人多出DS/CDMA系統(tǒng)中的半盲多用戶檢測算法

A SEMIBLIND MULTIUSER DETECTION ALGORITHM IN MIMO DS/CDMA SYSTEMS

  • 摘要: 多用戶檢測技術(shù)是DS/CDMA中的一項關(guān)鍵技術(shù),而天線陣的廣泛應(yīng)用也促使對多入多出系統(tǒng)的研究。該文將兩種技術(shù)結(jié)合在一起,考慮到基站在一般情況下總是知道本小區(qū)的多個用戶的擴頻碼,在此半盲意義下研究了將子空間方法應(yīng)用于多用戶檢測的技術(shù)。這種技術(shù)可適用于低速移動臺在慢衰落信道下的盲檢測。仿真結(jié)果表明這種算法相對于只利用一個用戶的擴頻碼的盲檢測算法性能有相當(dāng)大的提高。
    Abstract: Multiuser Detection (MUD) is a key technique in DS/CDMA systems. Antenna array has also promoted the investigation of Multiple Input Multiple Output(MIMO) system. In this paper a MUD method combined with MIMO considerations is proposed for multiuser interference reduction in antenna array DS/CDMA system. The knowledge that the base station knows many users spreading codes is utilized to form a semiblind MUD algorithm. This algorithm can work under slow fading environment, and simulation proves the superiority of the semiblind algorithm over the conventional blind algorithm.
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  • S. Verdu, Minimum probability of error for asynchronous Gaussian multiple-access channels, IEEE Trans. on Info. Theory, 1986, 32(1), 85-96.[2]R. Lupas, S. Verdu, Linear multiuser detectors for synchronous code-division multiple-access channels, IEEE Trans. on Info. Theory, 1989, 35(1), 123-136.[3]R. Lupas, S. Verdu, Near-far resistance of multiuser detectors in asynchronous channels, IEEE Trans. on Comm., 1990, 38(4), 496-508.[4]Vafa Ghazi-Moghadam, Mostafa Kaveh, A CDMA interference canceling receiver with an adaptive blind array, IEEE J. on SAC, 1998, 16(8), 1542-1554.[5]T.F. Wong, T. M. Lok, J. S. Lehnert, M. D. Zoltovski, A linear receiver for direct-sequence spread-spectrum multiple-access systems with antenna arrays and blind adaptation, IEEE Trans.on Info. Theory, 1998, 44(2), 659-676.[6]Hui Liu, Michael D. Zoltowski, Blind euqalization in antenna array CDMA systems, IEEE Trans.on Signal Processing, 1997, 45(1), 161-171.[7]S.Y. Miller, S. C. Schwartz, Integrated spatial-temporal detectors for asynchronous Gaussian multiple-access channels, IEEE Trans. on Comm., 1995, 43(2/3/4), 396-411.[8]李國通,CDMA系統(tǒng)中的空間時間處理,[博士論文],杭州,浙江大學(xué),1999.3.[9]Hui Liu, Guanghan Xu, Smart antennas in wireless systems: Uplink multiuser blind channel and sequence detection, IEEE Trans. on Comm., 1997, 45(2), 187-199.[10]Ye Li, K. J. Ray Liu, Adaptive blind source seperation and equalization for multipleinput/multiple-output systems, IEEE Trans. on Info. Theory, 1997, 44(10), 2864-2876.[11]A.J. Veen, S. Talwar, A. Paulraj, A subspace approach to blind space-time signal processing for wireless communication systems, IEEE Trans. on Signal Processing, 1997, 45(1), 173-190.[12]X. Wang, H. V. Poor, Blind equalization and multiuser detection in dispersive CDMA channels,IEEE Trans. on Comm., 1998, 46(1), 91-103.[13]E. Moulines, P. Duhamel, J. F. Cardoso, S. Mayrargue, Subspace methods for the blind identification of multichannel FIR filters, IEEE Trans. on Signal Processing, 1995, 43(2), 516-525.[14]M. Honig, U. Madhow, S. Verdu, Blind adaptive multiuser detection, IEEE Trans. on Info.Theory, 1995, 41(4), 944-960.[15]Xiaodong Wang, H. Vincent Poor, Space-time multiuser detection in multipath CDMA channels,IEEE Trans. on Signal Processing, 1999, 47(9), 2356-2374.[16]David Gesbert, Joakim Sorelius, Petre Stoica, A. Paulraj, Blind multiuser MMSE detector for CDMA signals in ISI channels, IEEE Comm. Lett., 1999, 3(8), 233-235.
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出版歷程
  • 收稿日期:  1999-09-20
  • 修回日期:  2000-05-15
  • 刊出日期:  2001-09-19

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