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多徑環(huán)境中多用戶波束形成與DOA估計

安毅,  呂昕,  高本慶

安毅, 呂昕, 高本慶. 多徑環(huán)境中多用戶波束形成與DOA估計[J]. 電子與信息學(xué)報, 2002, 24(11): 1499-1505.
引用本文: 安毅, 呂昕, 高本慶. 多徑環(huán)境中多用戶波束形成與DOA估計[J]. 電子與信息學(xué)報, 2002, 24(11): 1499-1505.
An Yi, Lu Xin, Gao Benqing. Beamforming and DOA estimation for multiuser in multipath circumstance[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1499-1505.
Citation: An Yi, Lu Xin, Gao Benqing. Beamforming and DOA estimation for multiuser in multipath circumstance[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1499-1505.

多徑環(huán)境中多用戶波束形成與DOA估計

Beamforming and DOA estimation for multiuser in multipath circumstance

  • 摘要: 該文討論了多徑環(huán)境中多用戶的波束形成與DOA估計問題,采用了解相關(guān)檢測器來估計用戶空間特征,提出了循環(huán)空間平滑算法(CSS)基于空間平滑的保持陣列權(quán)值維數(shù)不變的多用戶波束形成算法,其理論依據(jù)是采樣信號協(xié)方差矩陣的逆矩陣循環(huán)傳遞等效于對其求均值;利用了估計出的用戶空間特征構(gòu)造協(xié)方差矩陣進行空間平滑的高分辨DOA估計.仿真結(jié)果說明了循環(huán)空間平滑算法應(yīng)用于多用戶波束形成具有更優(yōu)的抗干擾性能。
    Abstract: In this paper beamforming and DOA estimation for multiuser are discussed in multipath circumstance. Decorrelating detector is adopted to detect multiuser. CSS (Cyclic Spatial Smoothing) algorithm is presented. The algorithm with spatial smoothing can keep array weight dimension unchanged. Its theoretical foundation is that cyclic propagation of the sampling signal covariance inverse matrix is equivalent to averaging of the covariance matrix. The estimated spatial signature is adopted to construct the covariance matrix for high resolution DOA estimation. The simulation results show that CSS has better performance for multiuser beamforming.
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  • J.H. Winters, J. Salz, R. D. Gitlin, The impact of antenna diversity on the capacity of wireless communication system, IEEE Trans. on Comm. 1994, 42(2/3/4), 1740-1751.[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]J Choi, Beamforming for the multiuser detection with decorrelator in synchronous CDMA system:Approaches and performance analysis, Signal Processing, 1997, 60(2), 195-211.[4]S. Kapoor, S. Gollamudi, S. Nagaraj, Y. F. Huang, Adaptive multiuser detection and beamforming for interference suppression in CDMA mobile radio systems, IEEE Trans. on Veh. Technol. 1999,48(5), 1341-1355.[5]X.D. Wang, H. V. Poor, Blind multiuser detecion: A subspace approach, IEEE Trans. on Info.Theory, 1998, 44(2), 677-690.[6]T.J. Shan, T. Kailath, Adaptive beamforming for coherent signal and interference, IEEE Trans.on ASSP, 1985, 33(3), 527-536.[7]T.J. Shan, M. Wax, T, Kailath, On spatial smoothing for direction-of-arrival estimation of coherent signals, IEEE Trans. on ASSP, 1985, 33(4), 806-811.[8]M.D. Zoltowski, M. Kantz, S. D. Silverstein, Beamspace ROOT-MUSIC, IEEE Trans. on Signal Processing, 1993, 41(11), 344-364.[9]T.T. Lin, A novel beamforming for coherent signal reception, Proc. of 5th International Symposium on Antennas, Propagation and EM Theory, Beijing, Aug.2000, 599-602.[10]S. Haykin, Adaptive filter theory, Englewood Cliffis. NJ, Prentice-Hall, 1991, 565-566.[11]姚敏立,金梁,殷勤業(yè),基于空間特征的多用戶循環(huán)累量域波達方向估計算法,通信學(xué)報,2000,21(5),36-40.
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出版歷程
  • 收稿日期:  2001-03-19
  • 修回日期:  2001-11-22
  • 刊出日期:  2002-11-19

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