Open AccessMultiuser incremental decode‐and‐forward relaying under outdated channel estimates
Author(s) -
Benítez Olivo E.E.,
Moya Osorio D.P.,
Costa D.B.,
Santos Filho J.C.S.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.3472
Subject(s) - expression (computer science) , relay , channel (broadcasting) , outage probability , computer science , maximal ratio combining , closed form expression , simple (philosophy) , scheme (mathematics) , diversity gain , topology (electrical circuits) , algorithm , mathematics , telecommunications , control theory (sociology) , fading , power (physics) , combinatorics , physics , mathematical analysis , philosophy , epistemology , quantum mechanics , programming language , control (management) , artificial intelligence
An exact closed‐form expression is derived for the outage probability of a recently proposed multiuser, incremental, decode‐and‐forward (DF) relaying scheme, when affected by outdated channel estimates. In this scheme, one source communicates with the best destination under the assistance of an incremental DF relay, with the direct‐ and relaying‐link signals being merged via maximal‐ratio combining. A simple asymptotic expression is also derived for the outage probability, revealing that the outdated channel estimates reduce the system diversity order to two, regardless of the amount of destinations available.