多径环境中多用户波束形成与DOA估计

安毅; 吕昕; 高本庆

多径环境中多用户波束形成与DOA估计

计量
- 文章访问数: 2218
- HTML全文浏览量: 109
- PDF下载量: 520
- 被引次数: 0
出版历程
- 收稿日期: 2001-03-19
- 修回日期: 2001-11-22
- 刊出日期: 2002-11-19

Beamforming and DOA estimation for multiuser in multipath circumstance

摘要

摘要: 该文讨论了多径环境中多用户的波束形成与DOA估计问题,采用了解相关检测器来估计用户空间特征,提出了循环空间平滑算法(CSS)基于空间平滑的保持阵列权值维数不变的多用户波束形成算法,其理论依据是采样信号协方差矩阵的逆矩阵循环传递等效于对其求均值;利用了估计出的用户空间特征构造协方差矩阵进行空间平滑的高分辨DOA估计.仿真结果说明了循环空间平滑算法应用于多用户波束形成具有更优的抗干扰性能。
- 多径; 解相关检测器; 波束形成; DOA估计; 空间平滑
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.

HTML全文

参考文献(1)

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,殷勤业,基于空间特征的多用户循环累量域波达方向估计算法,通信学报,2000,21(5),36-40.

施引文献

资源附件(0)

访问统计