A Multi-Step Predictive CDMA Closed-Loop Power Control Scheme for Time-Varying Fading Channels

Author

Choe, Sangho ; Uysal, Murat

Author_Institution

Sch. of Inf., Commun. & Electron. Eng., Catholic Univ. of Korea, Gyeonggi-Do

fYear

0

fDate

0-0 0

Firstpage

120

Lastpage

123

Abstract

This paper presents a CDMA closed-loop power control (CL PC) scheme with a multi-step linear autoregressive (AR) predictor for time-varying fading channels. The proposed method effectively compensates multiple power control group delays and provides significant performance gains over nonpredictive CLPCs as well as conventional predictive CLPCs with one-step linear predictor. For noisy fading prediction, adaptive tracking method like least mean squares (LMS) is more robust than fixed tracking method like least squares (LS) or minimum mean square error (MMSE) but LS is also a good alternative with its lower complexity and comparable performance as LMS

Keywords

autoregressive processes; closed loop systems; code division multiple access; fading channels; least mean squares methods; linear predictive coding; power control; telecommunication control; time-varying channels; tracking; CDMA; CLPC scheme; LMS; adaptive tracking method; closed-loop power control; code division multiple access; least mean square; multistep linear autoregressive predictor; one-step linear predictor; time-varying fading channel; Delay effects; Energy management; Fading; Least squares approximation; Mean square error methods; Multiaccess communication; Power control; Power measurement; Propagation losses; Shadow mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2006 23rd Biennial Symposium on

Conference_Location

Kigston, Ont.

Print_ISBN

0-7803-9528-X

Type

conf

DOI

10.1109/BSC.2006.1644585

Filename

1644585