An adaptive data-reuse interference cancellation scheme for DS-CDMA systems

Author

Tantikovit, S. ; Wang, M.Z.

Author_Institution

Hong Kong Polytech. Univ., Hong Kong

fYear

1997

fDate

9-12 Sep 1997

Firstpage

854

Abstract

An adaptive data-reuse (ADR) algorithm is proposed for an equalization based receiver in a direct-sequence code division multiple access (DS-CDMA) system. The proposed algorithm uses the available information in each receiving data period to perform multiple updating of the tap-weight vector. The number of iterations is dependent on the state of the equalizer. More iterations take place in the start-up period whereas fewer iterations are performed when the tap-weight vector is close to the optimum value. Simulation results show that the ADR based receiver converges much faster than a least-mean-square (LMS) based receiver when multiple-access interference (MAI) is strong

Keywords

adaptive equalisers; code division multiple access; convergence of numerical methods; interference suppression; iterative methods; receivers; spread spectrum communication; DS-CDMA systems; adaptive data-reuse interference cancellation scheme; algorithm; direct-sequence code division multiple access system; equalization based receiver; iterations; multiple updating; multiple-access interference; optimum value; simulation; start-up period; tap-weight vector; Adaptive equalizers; Convergence; Frequency conversion; Interference cancellation; Least squares approximation; Multiaccess communication; Multiple access interference; Power control; Propagation losses; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on

Print_ISBN

0-7803-3676-3

Type

conf

DOI

10.1109/ICICS.1997.652100

Filename

652100