Abstract
In this paper, we analyze the conventional closed-loop power-control system. We explain that the system behaves essentially as a companded delta modulator and then derive an expression for the power-control error in terms of the channel fading, which suggests methods for reducing the error variance. This is achieved by using a prediction technique for estimating the channel-power fading profile. The prediction module is combined with several proposed schemes for closed-loop power control. The resulting architectures are shown to result in improved performance in simulations.
| Original language | English |
|---|---|
| Pages (from-to) | 1447-1462 |
| Number of pages | 16 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 52 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2003 |
Bibliographical note
Funding Information:Manuscript received May 22, 2001; revised March 13 and July 23, 2003. Dr. Sayed’s work was supported in part by National Science Foundation Grant CCR-0208573. M. A. Aldajani is with King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia (e-mail: [email protected]). A. H. Sayed is with the Electrical Engineering Department, University of California, Los Angeles, CA 90095 USA. Digital Object Identifier 10.1109/TVT.2003.819448
Funding Information:
The first author would like to thank King Fahd University of Petroleum and Minerals for partial support of this work.
Keywords
- Adaptive filtering
- Channel inverse coding
- Closed loop
- Direct sequence code division multiple access (DS-CDMA)
- Error analysis
- Power control
- Prediction
- Rayleigh fading
ASJC Scopus subject areas
- Automotive Engineering
- Aerospace Engineering
- Computer Networks and Communications
- Electrical and Electronic Engineering