On the DoF of Parallel MISO BCs with Partial CSIT: Total Order and Separability
Information Theory
2017-07-11 v2 math.IT
Abstract
We study the degrees of freedom (DoF) of a -user parallel MISO broadcast channel with arbitrary levels of partial CSIT over each subchannel. We derive a sum-DoF upperbound which depends on the average CSIT quality of each user. This upperbound is shown to be tight under total order, i.e. when the order of users with respect to their CSIT qualities is preserved over all subchannels. In this case, it is shown that separate coding over each subchannel is optimum in a sum-DoF sense.
Keywords
Cite
@article{arxiv.1704.06180,
title = {On the DoF of Parallel MISO BCs with Partial CSIT: Total Order and Separability},
author = {Hamdi Joudeh and Bruno Clerckx},
journal= {arXiv preprint arXiv:1704.06180},
year = {2017}
}
Comments
A flaw in the application of the aligned image sets approach in the previous version has been corrected