[1] Wang Jianming, Zhao Chunming,. Constrained least squares algorithm for channelvector estimation in 2-D RAKE receiver [J]. Journal of Southeast University (English Edition), 2003, 19 (1): 1-4. [doi:10.3969/j.issn.1003-7985.2003.01.001]

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Constrained least squares algorithm for channelvector estimation in 2-D RAKE receiver()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

19

Issue:

2003 1

Page:

1-4

Research Field:

Information and Communication Engineering

Publishing date:

2003-03-30

Info

Title:

Constrained least squares algorithm for channelvector estimation in 2-D RAKE receiver

Author(s):

Wang Jianming;  Zhao Chunming

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Keywords:

2-D RAKE receiver;  channel estimation;  subspace decomposition;  constrained least squares

PACS:

TN929.5

DOI:

10.3969/j.issn.1003-7985.2003.01.001

Abstract:

Based on the fact that the variation of the direction of arrival(DOA)is slower than that of the channel fading, the steering vector of the desired signal is estimated firstly using a subspace decomposition method and then a constrained condition is configured. Traffic signals are further employed to estimate the channel vector based on the constrained least squares criterion. We use the iterative least squares with projection(ILSP)algorithm initialized by the pilot to get the estimation. The accuracy of channel estimation and symbol detection can be progressively increased through the iteration procedure of the ILSP algorithm. Simulation results demonstrate that the proposed algorithm improves the system performance effectively compared with the conventional 2-D RAKE receiver.

References:

[1] Thompson J S, Grant P M, Mulgrew B. Performance of antenna array receiver algorithms for CDMA [J]. Signal Processing, 1998, 68(1): 23-41.
[2] Choi J. Pilot channel-aided techniques to compute the beamforming vector for CDMA systems with antenna array[J]. IEEE Trans on Vehicular Technology, 2000, 49(5):1760-1775.
[3] van der Veen A, Vanderveen M C, Paulraj A. Joint angle and delay estimation using shift-invariance techniques[J]. IEEE Trans on Signal Processing, 1998, 46(2): 405-418.
[4] Talwar S, Viberg M, Paulraj A. Blind estimation of multiple co-channel digital signals using an antenna array[J]. IEEE Signal Processing Letters, 1994, 11(2):29-31.
[5] Chang K H, Sohn I S, Chang K S. Chip-level 2-D RAKE receiver with symbol-level searcher beamforming[A]. In: Vehicular Technology Conference[C]. Amsterdam, the Netherlands, 1999. 924-928.
[6] Li Ge, Ding Zhi. Semi-blind channel identification for individual data bursts in GSM wireless systems[J]. Signal Processing, 2000, 80(10): 2017-2031.

Memo

Memo:

Biographies: Wang Jianming(1970—), male, graduate; Zhao Chunming(corresponding author), male, professor, cmzhao@seu.edu.cn.

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