• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 21 Issue 5
Oct.  2008
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Article Contents
ZHANG Donghong, LIAO Guisheng. Successive Interference Cancellation Algorithm Based on Gram-Schmidt Orthogonalization Algorithm[J]. Journal of Southwest Jiaotong University, 2008, 21(5): 561-565.
Citation: ZHANG Donghong, LIAO Guisheng. Successive Interference Cancellation Algorithm Based on Gram-Schmidt Orthogonalization Algorithm[J]. Journal of Southwest Jiaotong University, 2008, 21(5): 561-565.

Successive Interference Cancellation Algorithm Based on Gram-Schmidt Orthogonalization Algorithm

  • Received Date: 18 Sep 2007
  • Publish Date: 25 Oct 2008
  • A new SIC(successive interference cancellation) algorithm based on the Gram-Schmidt orthogonalization algorithm was presented.Unlike the conventional SIC algorithm,this algorithm uses an optimal despreading sequence,locally generated by the Gram-Schmidt orthogonalization of spreading sequences,to demodulate a received signal in each stage.The despreading code of the strongest user in each stage is orthogonal to the subspace spanned by the spreading code of other users,so that the multiple access interference(MAI) is fully suppressed.An approximate bit error rate(BER) formula with the amplitude mismatch was proposed,and the effect of the amplitude mismatch on the BER performance of CDMA systems was discussed.Simulations show that the new algorithm can effectively cancel MAI and improve the BER performance.

     

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  • VERDU S.Multiuser detection[M].Cambridge:Cambridge University Press,1998:112-136.[2] LUPAS R,VERDU S.Linear multiuser detectors for synchronous code-division multiple acess channels[J].IEEE Trans.on Info.Theory,1989,35(1):123-136.[3] 任品毅,朱世华,汪勇刚.基于克莱姆·施密特正交化法则的多用户检测器[J].西安交通大学学报,2001,35(6):586-590.BEN Pinyi,ZHU Shihna,WANG Yonggang.Multi-user detector based on Gram-Schmidt algorithm[J].Journal of Xi'an Jiao Tong University,2001,35(6):586-590.[4] PATEL P,HOLTZMANM J.Analysis of a simple successive interference cancellation scheme in a DS/CDMA systeEJ].IEEE Trans.on Selected Areas in Communications,1994,12(5):2477-2484.[5] LAI K C.Performance evaluation of a generalized linear SIC for DS/CDMA signals[J].IEEE Trans.on Signal Processing,2003,51(6):1604-1614.[6] LAI K C.Analysis of the linear SIC for DS/CDMA signals with random spreading[J].IEEE Trans.on Signal Processing,2004,52(12):3 417-3 428.[7] LIU T H.Decision-feedback multiuser detection with orthogonal feodforward transformation[J].IEEE Trans.on Vehicularechnology,2004,53(5):1 370-1 378.[8] WATERS D W,BARRY J R.A low-complexlty upgrade of the linear detector for MIMO channels via partial decision feedback[J].IEEE.Trans.on Wireless.Communications,2007,5(6):1587-1590.
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