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

Decode-and-forward (D-F) and compress-and-forward (C-F) are two fundamentallydifferent relay strategies proposed by (Cover and El Gamal, 1979).Individually, either of them has been successfully generalized to multi-relaychannels. In this paper, to allow each relay node the freedom of choosingeither of the two strategies, we propose a unified framework, where both theD-F and C-F strategies can be employed simultaneously in the network. It turnsout that, to fully incorporate the advantages of both the best known D-F andC-F strategies into a unified framework, the major challenge arises as follows:For the D-F relay nodes to fully utilize the help of the C-F relay nodes,decoding at the D-F relay nodes should not be conducted until all the blockshave been finished; However, in the multi-level D-F strategy, the upstreamnodes have to decode prior to the downstream nodes in order to help, whichmakes simultaneous decoding at all the D-F relay nodes after all the blockshave been finished inapplicable. To tackle this problem, nested blocks combinedwith backward decoding are used in our framework, so that the D-F relay nodesat different levels can perform backward decoding at different frequencies. Assuch, the upstream D-F relay nodes can decode before the downstream D-F relaynodes, and the use of backward decoding at each D-F relay node ensures the fullexploitation of the help of both the other D-F relay nodes and the C-F relaynodes. The achievable rates under our unified relay framework are found tocombine both the best known D-F and C-F achievable rates and include them asspecial cases.

A Unified Relay Framework with both D-F and C-F Relay Nodes