Diversity-Multiplexing Tradeoff in the Low-SNR Regime
Information Theory
2015-03-19 v1 math.IT
Abstract
An extension of the popular diversity-multiplexing tradeoff framework to the low-SNR (or wideband) regime is proposed. The concept of diversity gain is shown to be redundant in this regime since the outage probability is SNR-independent and depends on the multiplexing gain and the channel power gain statistics only. The outage probability under the DMT framework is obtained in an explicit, closed form for a broad class of channels. The low and high-SNR regime boundaries are explicitly determined for the scalar Rayleigh-fading channel, indicating a significant limitation of the SNR-asymptotic DMT when the multiplexing gain is small.
Keywords
Cite
@article{arxiv.1102.5365,
title = {Diversity-Multiplexing Tradeoff in the Low-SNR Regime},
author = {Sergey Loyka and Georgy Levin},
journal= {arXiv preprint arXiv:1102.5365},
year = {2015}
}
Comments
accepted by IEEE Comm. Letters