An enhanced multimode power loading algorithm applicable to large dimensional OFDM systems

Multi-mode power loading is an attractive power loading technique since it avoids iterative procedures and periodic updates of a threshold value in order to find the best power loading configuration. Simultaneously, multi-mode power loading achieves comparable spectral efficiency to optimal waterfil...

Full description

Saved in:
Bibliographic Details
Main Authors: Choi, E.H., Wan Choi, Womack, B.F.
Format: Conference Proceeding
Language:English
Subjects:
Channel state information
Downlink
Iterative algorithms
OFDM
Performance analysis
Power generation
Power system modeling
State feedback
Transceivers
Transmitters
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Multi-mode power loading is an attractive power loading technique since it avoids iterative procedures and periodic updates of a threshold value in order to find the best power loading configuration. Simultaneously, multi-mode power loading achieves comparable spectral efficiency to optimal waterfilling with full channel state information (CSI) using only N feedback bits, where N is the number of subcarriers. The requirement of 2 N - 1 brute-force searches, however, makes multi-mode power loading infeasible for large N. This paper proposes a new power loading technique to circumvent this limit of multi-mode power loading. Our analysis and numerical results show the proposed technique achieves the same spectral efficiency as multi-mode power loading only using N searches, thus working well even for large N.
ISSN:2155-7578
2155-7586
DOI:10.1109/MILCOM.2008.4753544