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

This work studies the Gaussian interference channel (IC) with a relay, whichtransmits and receives in a band that is orthogonal to the IC. The channelassociated with the relay is thus an out-of-band relay channel (OBRC). Thefocus is on a symmetric channel model, in order to assess the fundamentalimpact of the OBRC on the signal interaction of the IC, in the simplestpossible setting. First, the linear deterministic model is investigated and thesum capacity of this channel is established for all possible channelparameters. In particular, it is observed that the impact of OBRC, as its linksget stronger, is similar to that of output feedback for the IC. The insightsobtained from the deterministic model are then used to design achievableschemes for the Gaussian model. The interference links are classified asextremely strong, very strong, strong, moderate, weak, and very weak. Forstrong and moderate interference, separate encoding is near optimal. For verystrong and extremely strong interference, the interference links provide sideinformation to the destinations, which can help the transmission through theOBRC. For weak or very weak interference, an extension of the Han-Kobayashischeme for the IC is utilized, where the messages are split into common andprivate. To achieve higher rates, it is beneficial to further split the commonmessage into two parts, and the OBRC plays an important role in decoding thecommon message. It is shown that our strategy achieves the symmetric capacityto within 1.14625 bits per channel use with duplexing factor 0.5, and 1.27125bits per channel use for arbitrary duplexing factors, for all channelparameters. An important observation from the constant gap result is thatstrong interference can be beneficial with the presence of an OBR.

Symmetric Capacity of the Gaussian Interference Channel with an Out-of-Band Relay to within 1.15 Bits