Multiuser equalization using multidimensional lattice filter for DS/CDMA

Author

Jitsukawa, Daisuke ; Kohno, Ryuji

Author_Institution

Fac. of Eng., Yokohama Nat. Univ., Japan

fYear

1995

Firstpage

899

Lastpage

903

Abstract

This paper proposes and investigates the adaptive multiuser equalizer based on the multidimensional IIR adaptive lattice filter in order to suppress the co-channel interference (CCI) in asynchronous DS/CDMA system. The equalizing error of the filter is small, compared with that of the multidimensional FIR transversal filter, of which the number of taps is finite. The multi-dimensional lattice filter can adaptively achieve fast and stable convergence with less taps. Since the filter can resolve correlative multiple input into orthogonal output stage by stage, CCI can be removed. Computer simulations show performance of the proposed scheme

Keywords

IIR filters; adaptive equalisers; adaptive filters; cellular radio; cochannel interference; code division multiple access; convergence of numerical methods; correlation theory; interference suppression; land mobile radio; lattice filters; multidimensional digital filters; pseudonoise codes; radiofrequency interference; spread spectrum communication; DS/CDMA; adaptive multiuser equalizer; co-channel interference; convergence; correlative multiple input; equalizing error; multidimensional IIR adaptive lattice filter; orthogonal output; performance; taps; Adaptive filters; Equalizers; Finite impulse response filter; IIR filters; Interchannel interference; Lattices; Multiaccess communication; Multidimensional systems; Radiofrequency interference; Transversal filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on

Conference_Location

Tokyo

Print_ISBN

0-7803-2955-4

Type

conf

DOI

10.1109/ICUPC.1995.497139

Filename

497139