DocumentCode :
2312678
Title :
Semi-Blind Adaptive Multiuser Detection Based on Subspace Constrained Chebyshev Approximation
Author :
Meng, Yan ; Wang, Jinkuan ; Zhu, Jun ; Liu, Zhigang
Author_Institution :
Sch. of Inf. Sci. & Eng., Northeastern Univ., Shenyang
fYear :
2006
fDate :
25-27 Oct. 2006
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, a new semi-blind adaptive multiuser detection based on a subspace constrained Chebyshev approximation (CA) is proposed for multicarrier code division multiple access (MC-CDMA) uplink system. This proposed detector fully utilizes all known information to suppress the interferers within the cell, while mitigating the inter-cell interferers based on the minimum output energy (MOE) principle. A subspace constrained CA algorithm is designed to obtain the MOE weight vector adaptively, which significantly outperforms the CA algorithm. To reduce the computational complexity, an improved projecting approximation subspace tracking with deflation (PASTd) algorithm is developed for adaptive signal subspace estimation. Computer simulations show that the performance of the proposed semi-blind multiuser detection is much better than that of the blind multiuser detection based on Chebyshev approximation
Keywords :
adaptive signal detection; approximation theory; code division multiple access; multiuser detection; radio links; MC-CDMA uplink system; adaptive signal subspace estimation; inter-cell interferers; minimum output energy; multicarrier code division multiple access; projecting approximation subspace tracking with deflation; semi-blind adaptive multiuser detection; subspace constrained Chebyshev approximation; Algorithm design and analysis; Approximation algorithms; Chebyshev approximation; Computational complexity; Computer simulation; Detectors; Interference constraints; Multicarrier code division multiple access; Multiuser detection; Subspace constraints;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications and Networking in China, 2006. ChinaCom '06. First International Conference on
Conference_Location :
Beijing
Print_ISBN :
1-4244-0463-0
Electronic_ISBN :
1-4244-0463-0
Type :
conf
DOI :
10.1109/CHINACOM.2006.344813
Filename :
4149778
Link To Document :
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