Title :
Convergence behaviors of adaptive DS-CDMA receivers
Author :
Wang, Hsuan-Fu ; Ueng, Fang-Biau ; Chang, Jui-Chi ; Jeng, Li-Der
Author_Institution :
Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung
Abstract :
This paper aims to investigate the convergence and transient behaviors of the symbol-based adaptive receivers for direct sequence-code division multiple access (DS-CDMA) communication system in multipath channels. The input signal vector is characterized as a simple stochastic model to simplify the analysis of the least mean square (LMS) and the normalized least mean square (NLMS) adaptive receivers. The learning curve, which is the ensemble average of the squared estimation error is applied to analyze the convergence of adaptive receivers for DS-CDMA system in multipath channels. Computer simulations show that the analytical results of the learning curve obtained in this work are consistent with the simulation results.
Keywords :
code division multiple access; convergence of numerical methods; least mean squares methods; multipath channels; radio receivers; spread spectrum communication; stochastic processes; communication system; convergence behavior; direct sequence-code division multiple access; input signal vector; multipath channel; normalized least mean square; squared estimation error; stochastic model; symbol-based adaptive receiver; transient behavior; Analytical models; Computational modeling; Computer simulation; Convergence; Estimation error; Least squares approximation; Multiaccess communication; Multipath channels; Signal analysis; Stochastic processes; DS-CDMA; LMS; NLMS;
Conference_Titel :
Information Theory and Its Applications, 2008. ISITA 2008. International Symposium on
Conference_Location :
Auckland
Print_ISBN :
978-1-4244-2068-1
Electronic_ISBN :
978-1-4244-2069-8
DOI :
10.1109/ISITA.2008.4895561
