(2007) A ChipLevel BSORbased linear GSIC multiuser Detector for LongCode CDMA Systems. EURASIP Journal on Wireless Communications and Networking, 2007.

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Abstract
In this work, we introduce a chiplevel linear groupwise successive interference cancellation (GSIC) multiuser structure that is asymptotically equivalent to block successive overrelaxation (BSOR) iteration, which is known to outperform the conventional block GaussSeidel iteration by an order of magnitude in terms of convergence speed. The main advantage of the proposed scheme is that it uses directly the spreading codes instead of the crosscorrelation matrix and thus doesn’t require the calculation of the crosscorrelation matrix (requires 2NK2 floating point operations (flops), where N is the processing gain and K is the number of users) which reduces significantly the overall computational complexity. Thus it is suitable for longcode CDMA systems such as IS95 and UMTS where the crosscorrelation matrix is changing every symbol. We study the convergence behavior of the proposed scheme using two approaches and prove that it converges to the decorrelator detector if the overrelaxation factor is in the interval ]0, 2[. Simulation results are in excellent agreement with theory.
Item Type:  Article 

Subjects:  Electrical 
Department:  College of Engineering and Physics > Electrical Engineering 
Depositing User:  ABDELOUAHAB BENTRCIA 
Date Deposited:  24 Mar 2008 13:03 
Last Modified:  01 Nov 2019 13:24 
URI:  http://eprints.kfupm.edu.sa/id/eprint/707 