Adaptive array algorithms for wireless CDMA systems with multipaths

Author

De Matos, Antônio Rénede R ; de Mendonga, L.M. ; d´Assuncao, A.G.

Author_Institution

Departamento de Engenharia Eletrica, Univ. Fed. do Rio Grande do Norte, Natal, Brazil

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

31

Abstract

In this paper we propose modifications in the least-squares despread respread multitarget array (LS-DRMTA) and recursive least-squares (RLS) algorithms, in order to improve the performance of adaptive arrays in the presence of multipath. It is shown from simulation that the radiation patterns formed with MLS-DRMTA and MRLS point beams toward the directions of all the desired signal arriving multipaths, while those formed with LS-DRMTA and RLS point only a main beam in the direction of the multipath which is synchronized with the receiver. Thus the new algorithms are indicated to perform coherent combination of multipath.

Keywords

adaptive antenna arrays; antenna radiation patterns; code division multiple access; least squares approximations; mobile radio; multipath channels; spread spectrum communication; LS-DRMTA; MLS-DRMTA; RLS algorithms; adaptive array algorithms; least-squares despread respread multitarget array; multipath coherent combination; radiation patterns; recursive least-squares algorithms; wireless CDMA systems; AWGN; Adaptive algorithm; Adaptive arrays; Antenna radiation patterns; Delay effects; Multiaccess communication; Postal services; Receiving antennas; Resonance light scattering; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 2001. IMOC 2001.Proceedings of the 2001 SBMO/IEEE MTT-S International

Print_ISBN

0-7803-7065-1

Type

conf

DOI

10.1109/SBMOMO.2001.1008712

Filename

1008712