Blind Adaptive Multiuser Detection Based on Affine Projection Algorithm

  • Amin Khansefid
  • Ali Olfat
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 27)


We introduce an algorithm for blind adaptive multiuser detection of synchronous direct sequence code division multiple access (DS-CDMA) signals. This algorithm is based on the affine projection algorithm (APA). We first derive the algorithm for a single antenna at the receiver and then generalize it to the multiple antenna case at the receiver. Simulation results show that the proposed algorithm has lower misadjustment, an improved convergence rate, and superior bit error rate performance compared to existing conventional methods.


Code Division Multiple Access Multiuser Detector Single Antenna Code Division Multiple Access System Step Size Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors wish to thank the Iran Telecommunication Research Centre (ITRC) for helpful financial support.


  1. 1.
    Verdu S (1986) Minimum probability of error for asynchronous Gaussian multiple-access channels. IEEE T Inform Theory 32:85–96CrossRefMATHMathSciNetGoogle Scholar
  2. 2.
    Verdu S (1998) Multiuser detection. Cambridge University Press, CambridgeMATHGoogle Scholar
  3. 3.
    Wang X, Poor HV (2002) Wireless communication systems, advanced techniques for signal receptions. Prentice Hall, Englewood Cliffs, NJGoogle Scholar
  4. 4.
    Honig M, Madhow U, Verdu S (1995) Blind adaptive multiuser detection. IEEE T Inform Theory 41(7):944–960CrossRefMATHGoogle Scholar
  5. 5.
    Poor HV, Wang X (1997) Code-aided interference suppression for DS-CDMA communications. IEEE T Commun 45(9):1112–1122CrossRefGoogle Scholar
  6. 6.
    Li J, Zhang X (2005) Blind adaptive multiuser detection based on affine projection algorithm. IEEE Signal Proc Lett 12(10):673–676CrossRefGoogle Scholar
  7. 7.
    Haykin S (2001) Adaptive filter theory. Prentice Hall, Englewood Cliffs, NJGoogle Scholar
  8. 8.
    Olfat A, Nader-Esfahani S (April 2004) New receiver for multiuser detection of CDMA signals with antenna arrays. IEE P-Commun 151(2):143–151CrossRefGoogle Scholar
  9. 9.
    Wang X, Poor VH (1999) Space-time multiuser detection in multipath CDMA channels. IEEE T Signal Process 47(9):2356–2374CrossRefMATHGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Electrical and Computer Engineering DepartmentUniversity of TehranIran

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