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An analytical model for performance evaluation of parallel interference cancellers in CDMA systems

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4 Author(s)
Guoqiang Xue ; Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada ; Weng, J.F. ; Le-Ngoc, Tho ; Tahar, S.

In multistage parallel interference cancellation, the tentative decisions for different users at each stage are mutually correlated, and they are also correlated with Gaussian noise. By taking the correlations into consideration and employing Price's theorem, an analytical model is proposed to refine the variance evaluation of the final decision variable. It is shown that the refined variance is very close to that obtained by simulation and can improve the accuracy in bit error rate evaluation.

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Communications Letters, IEEE  (Volume:4 ,  Issue: 6 )