DMCA
A Partial Ordering Relation on Flat-Fading Channels (2004)
BibTeX
@MISC{Fozunbal04apartial,
author = {Majid Fozunbal and Steven W. Mclaughlin and Ronald W. Schafer},
title = {A Partial Ordering Relation on Flat-Fading Channels},
year = {2004}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
In this correspondence, we establish a partial ordering framework to compare flatfading channels in a capability sense, which is based on the relative dominance of their mutual information functions over a convex set of input distributions. For this purpose, we address the effect of the line-of-sight and scattering components on the mutual information of flat-fading channels. For example, we show that in the presence of channel state information (CSI) at the receiver, the mutual information of flat-fading channels is monotonically increasing with respect to the absolute value of the line-of-sight component of the channel. In other words, for a fixed scattering component, channels with larger line-of-sight component are more capable than channels with smaller line-of-sight component. In contrast, in the absence of CSI, the mutual information is monotonically increasing with respect to the line-of-sight component, provided that it is smaller than or equal to the standard deviation of the scattering component. Furthermore, we briefly address applications of this work to the capacity assessment of simple and compound channels.
Keyphrases
flat-fading channel line-of-sight component mutual information partial ordering relation scattering component channel state information compound channel fixed scattering component standard deviation capability sense absolute value relative dominance partial ordering framework capacity assessment mutual information function input distribution address application convex set
