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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, we study the degrees of freedom (DoF) of thefrequency-selective K-user interference channel in the presence of aninstantaneous relay (IR) with multiple receive and transmit antennas. Weinvestigate two scenarios based on the IR antennas' cooperation ability. First,we assume that the IR receive and transmit antennas can coordinate with eachother, where the transmitted signal of each transmit antenna can depend on thereceived signals of all receive antennas, and we derive an achievable DoF forthis model. In our interference alignment scheme, we divide receivers into twogroups, called clean and dirty receivers. We design our scheme such that a partof the message of clean receivers can be demultiplexed at the IR. Thus, the IRcan use these message streams for interference cancelation at the cleanreceivers. Next, we consider an IR, whose antennas do not have coordinationwith each other, where the transmitted signal of each transmit antenna onlydepends on the received signal of its corresponding receive antenna, and wederive an achievable DoF for it. We show that the achievable DoF decreasesconsiderably compared with the coordinated case. In both of these models, ourschemes achieve the maximum K DoFs, if the number of transmit and receiveantennas is more than a finite threshold.

On Achievable Degrees of Freedom for the Frequency-Selective K-User Interference Channel in the Presence of an Instantaneous Relay