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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Link adaptation, in particular adaptive coded modulation (ACM), is apromising tool for bandwidth-efficient transmission in a fading environment.The main motivation behind employing ACM schemes is to improve the spectralefficiency of wireless communication systems. In this paper, using a finitenumber of capacity achieving component codes, we propose new transmissionschemes employing constant power transmission, as well as discrete andcontinuous power adaptation, for slowly varying flat-fading channels.  We show that the proposed transmission schemes can achieve throughputs closeto the Shannon limits of flat-fading channels using only a small number ofcodes. Specifically, using a fully discrete scheme with just four codes, eachassociated with four power levels, we achieve a spectral efficiency within 1 dBof the continuous-rate continuous-power Shannon capacity. Furthermore, whenrestricted to a fixed number of codes, the introduction of power adaptation hassignificant gains with respect to ASE and probability of no transmissioncompared to a constant power scheme.

Rate and Power Allocation for Discrete-Rate Link Adaptation