English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, we study the problem of communication from rovers on Mars' surface to Mars-orbiting satellites (orbiters). We first justify that, to a good extent, the problem can be modelled as communication over a 2&#x00D7;2 Gaussian Xchannel with varying topologies. We then study the capacity of such a channel under the assumption that no channel state information is provided to the transmitters (i.e., no CSIT) other than the network topology. By proposing a strategy that takes advantage of coding across topologies and developing novel upper bounds, we characterize the sum degree-of-freedom (DoF) and the ergodic sum capacity to within a constant gap for the 2&#x00D7;2 X-channel with varying topologies. In addition, we demonstrate the performance gain of the proposed scheme over the baseline time-division-multiple-access (TDMA) scheme currently in use.

Rover-to-orbiter communication in Mars: Taking advantage of the varying topology