Title :
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
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;
Conference_Titel :
Communications, 2006 23rd Biennial Symposium on
Conference_Location :
Kigston, Ont.
Print_ISBN :
0-7803-9528-X
DOI :
10.1109/BSC.2006.1644585
