Multiple-antenna CDMA mobile reception using constrained normalized adaptive algorithms

Author

Werner, Stefan ; Apolinario, J.A., Jr. ; Laakso, Timo I.

Author_Institution

Lab. of Telecom. Technol., Helsinki Univ. of Technol., Espoo, Finland

fYear

1998

fDate

9-13 Aug 1998

Firstpage

354

Abstract

We analyze adaptive algorithms for a multiple-antenna code division multiple access (CDMA) mobile receiver. We study the constrained versions of the binormalized data-reusing LMS (BNDR-LMS) and the normalized LMS (NLMS). Their performance is compared with that of the classical Frost algorithm. Time-varying step-sequences are used to further enhance the performance of the receiver. The results show that considerable improvement in the convergence speed can be achieved with the use of the normalized algorithms compared with the conventional Frost algorithm. Using an optimal step-sequence in the update provides a fast convergence and a near-optimum steady-state performance

Keywords

adaptive antenna arrays; code division multiple access; convergence; least mean squares methods; mobile antennas; mobile radio; radio receivers; receiving antennas; sequences; BNDR-LMS; CDMA; Frost algorithm; NLMS; binormalized data-reusing LMS; code division multiple access; constrained normalized adaptive algorithms; convergence speed; mobile receiver; multiple-antenna reception; normalized LMS; optimal step-sequence; steady-state performance; time-varying step-sequences; Adaptive algorithm; Algorithm design and analysis; Convergence; Interference suppression; Laboratories; Least squares approximation; Mobile antennas; Multiaccess communication; Receiving antennas; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Symposium, 1998. ITS '98 Proceedings. SBT/IEEE International

Conference_Location

Sao Paulo

Print_ISBN

0-7803-5030-8

Type

conf

DOI

10.1109/ITS.1998.713146

Filename

713146