Computer Science – Information Theory
Scientific paper
2007-07-17
Computer Science
Information Theory
9 pages, 8 figures, submitted to the EURASIP Journal on Wireless Communications and Networking, July 2007
Scientific paper
Link adaptation, in particular adaptive coded modulation (ACM), is a promising tool for bandwidth-efficient transmission in a fading environment. The main motivation behind employing ACM schemes is to improve the spectral efficiency of wireless communication systems. In this paper, using a finite number of capacity achieving component codes, we propose new transmission schemes employing constant power transmission, as well as discrete and continuous power adaptation, for slowly varying flat-fading channels. We show that the proposed transmission schemes can achieve throughputs close to the Shannon limits of flat-fading channels using only a small number of codes. Specifically, using a fully discrete scheme with just four codes, each associated with four power levels, we achieve a spectral efficiency within 1 dB of the continuous-rate continuous-power Shannon capacity. Furthermore, when restricted to a fixed number of codes, the introduction of power adaptation has significant gains with respect to ASE and probability of no transmission compared to a constant power scheme.
Alouini Mohamed-Slim
Gesbert David
Gjendemsjø Anders
Hole Kjell J.
Holm Henrik
No associations
LandOfFree
Rate and Power Allocation for Discrete-Rate Link Adaptation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Rate and Power Allocation for Discrete-Rate Link Adaptation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rate and Power Allocation for Discrete-Rate Link Adaptation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-562972