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DS-CDMA code acquisition in the presence of correlated fading-part II: application to cellular networks

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3 Author(s)
Caini, C. ; Univ. of Bologna, Italy ; Corazza, G.E. ; Vanelli-Coralli, A.

This paper applies the theoretical framework for the evaluation of code acquisition in the presence of fading developed in the companion Part I paper. Code synchronization for code-division multiple-access (CDMA) cellular networks, such as IS-95 and cdma2000, is considered. A multidwell testing procedure is adopted. Notably, a procedure for the optimization of the multidwell parameters (number of dwells, dwell lengths, thresholds) to achieve minimum acquisition time is introduced and enforced. The effects of fading, interchip interference (ICI), frequency offset, multiple-access interference, and noise are taken into account in the determination of false alarm and detection probabilities. In particular, anomalous ICI despreading and internal interference-cancellation effects are described. Numerical and simulation results, in terms of time for correct acquisition, confirm the accuracy of the proposed approach and show how it can be effectively used in the design and evaluation of a code-acquisition subsystem.

Published in:

Communications, IEEE Transactions on  (Volume:52 ,  Issue: 8 )

Date of Publication:

Aug. 2004

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