Title :
Discrete stochastic approximation algorithms for spreading code adaptation in CDMA systems
Author :
Krishnamurthy, Vikram ; Wang, Xiaodong
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
This paper presents discrete stochastic approximation algorithms that adaptively optimize the spreading codes of users in a CDMA system employing linear MMSE receivers. The proposed algorithm has a self-learning capability, i.e., it spends most of the computational effort at the global minimizer of the objective function.
Keywords :
adaptive filters; code division multiple access; fading channels; least mean squares methods; multipath channels; optimisation; stochastic processes; time-varying channels; CDMA systems; MMSE; code division multiple access; computational effort; discrete stochastic approximation algorithms; global minimizer; linear receivers; minimum mean square error; self-learning capability; spreading code adaptation; time varying channel conditions; Approximation algorithms; Detectors; Fading; Least squares approximation; Multiaccess communication; Signal processing algorithms; Stochastic processes; Stochastic systems; Transmitters; Vectors;
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7576-9
DOI :
10.1109/ACSSC.2002.1197297
