General analysis of downlink power control in CDMA systems

Author

Lima, Adriano Da Rocha ; Brandao, Joao Celio

Author_Institution

CETUC, Univ. Catolica de Rio de Janeiro, Brazil

fYear

1998

fDate

9-13 Aug 1998

Firstpage

172

Abstract

The classical analysis of the downlink power control in CDMA cellular systems neglects the background noise in the mobile receivers and leads to a solution for the equalized signal-to-interference ratio by solving an eigenvalue problem. By considering the background noise, we obtain a general solution that includes the previous result and is optimal in the sense that it minimizes the transmitted power. Detailed illustration is presented for an homogeneous system and a general formulation is given for non-homogeneous systems

Keywords

cellular radio; code division multiple access; eigenvalues and eigenfunctions; minimisation; power control; radio links; radio receivers; radiofrequency interference; telecommunication control; CDMA systems; background noise; cellular systems; downlink power control; eigenvalue; homogeneous system; minimization; mobile receivers; non-homogeneous systems; signal-to-interference ratio; Background noise; Base stations; Degradation; Downlink; Eigenvalues and eigenfunctions; Interference; Multiaccess communication; Power control; Power system modeling; Signal analysis;

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.1998.713112

Filename

713112