Adaptive step-size constant modulus algorithm for DS-CDMA receivers in nonstationary environments

Authors:
Peerapol Yuvapoositanon;Jonathon A. Chambers
Affiliations:
Signal and Image Processing Group, Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY, UK and Department of Electronic Engineering, Mahanakorn University of Tech ...;Signal and Image Processing Group, Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY, UK
Venue:
Signal Processing
Year:
2002

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Abstract

A new adaptive step-size constant modulus algorithm for direct-sequence code division multiple access receivers is presented for application in nonstationary channel conditions. The algorithm is derived upon the basis of adapting the step-size to minimise the constant modulus criterion and its convergence is verified analytically. Simulations show the superior performance of the proposed method over similar adaptive receivers and its robustness to different settings of the initial step-size.