Blind CMA-Based Asynchronous Multiuser Detection Using Generalized Sidelobe Canceller with Decision Feedback

Ann-Chen CHANG  Chih-Wei JEN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B    No.1    pp.376-380
Publication Date: 2008/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.1.376
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
CDMA,  asynchronous,  constant modulus algorithm,  decision-feedback,  generalized sidelobe canceller,  

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Summary: 
This letter deals with blind multiuser detection based on the multi-channel linearly constrained constant modulus algorithm (MLCCMA) for asynchronous code division multiple access (CDMA) systems over frequency-selective Rayleigh fading channels. In conjunction with the decision-feedback generalized sidelobe canceller (DFGSC), we present an efficient approach to combat multiple access interference and intersymbol interference. Computer simulations confirm that the proposed MLCCMA-based DFGSC can significantly speed up convergence and improve the output performance.