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Capacity of the linear decorrelating detector for QS-CDMA

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2 Author(s)
I. Ghauri ; Dept. of Mobile Commun., Eurecom Inst., Sophia Antipolis, France ; R. A. Iltis

We study the performance and capacity of a quasi-synchronous code-division multiple-access (QS-CDMA) cellular system employing the decorrelating detector. It is assumed that each of N users has a GPS generated local clock, and attempts to transmit in synchrony with the other users in its cell. The detector makes use of the small timing uncertainties to build the interference signal space and perfectly cancel the interference. Results are compared with those of an adaptive MSE receiver. It is shown that when the LMS adaptive algorithm is employed, the mean-squared-error misadjustment significantly affects the receiver performance. Finally, system capacities in terms of users/cell are evaluated

Published in:

IEEE Transactions on Communications  (Volume:45 ,  Issue: 9 )