Author
Amin, O., Uysal, Murat
Publication Date
2011-03
Publication Place
-
IEEE
Subject
OFDM, Power allocation, Bit allocation, Amplify-and-forward relaying, Cooperative network
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1536-1276
Record ID
c3e7909a-245e-4826-8ce6-76d23e36ecfb
Library Location
Electrical & Electronics Engineering
Date
2011-03
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
In this paper, we investigate bit and power allocation strategies for an orthogonal frequency division multiplexing (OFDM) cooperative network over frequency-selective fading channels. We assume amplify-and-forward relaying and consider the bit error rate (BER) performance as our performance measure. Aiming to optimize the BER under total power constraint and for a given average data rate, we propose three adaptive algorithms; optimal power loading (OPL), optimal bit loading (OBL), and optimal joint bit and power loading (OBPL). Our Monte Carlo simulation results demonstrate performance gains through adaptive bit and power loading over conventional non-adaptive systems as well as currently available adaptive cooperative scheme in the literature. The impact of practicalissues on the performance of proposed adaptive schemes such as imperfect channel estimation and limited feedback is further discussed.
DOI
10.1109/TWC.2011.011111.091233
Cilt
10
