YUVAPOOSITANON, P. and CHAMBERS, J.A., 2003. Convergence behaviours of an adaptive step-size constant modulus algorithm for DS-CDMA receivers. IN: Proceedings of 2003 International Symposium on Circuits and Systems (ISCAS '03), Bangkok, Thailand, 25-28 May, Vol. 3, pp. 40-43.
A convergence analysis of the blind adaptive step-size constant
modulus algorithm (AS-CMA) for direct-sequence code division
multiple access (DS-CDMA) receivers is presented. Analytical
results show similar convergence behaviours of the AS-CMA receiver
and the adaptive step-size stochastic approximation (ASSA)
receiver. Simulations show that the blind AS-CMA algorithm
performs comparably with the non-blind AS-SA in a Markovian
type of nonstationary environment. The robustness of the proposed
algorithm to different settings of the initial step-size is also shown.