Open AccessOutage behaviour and SCK‐based power allocation for analogue network coding protocol in cooperative networks
Author(s) -
Zhan Ao,
Ren Zhu,
Wu Chengyu,
Shi Qingjiang,
Xu Weiqiang,
Shi Qiming
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.1051
Subject(s) - computer science , relay , power (physics) , linear network coding , coding (social sciences) , outage probability , signal to noise ratio (imaging) , protocol (science) , channel (broadcasting) , mathematical optimization , computer network , topology (electrical circuits) , telecommunications , mathematics , statistics , fading , medicine , physics , alternative medicine , pathology , quantum mechanics , combinatorics , network packet
In this study, the authors consider the communication scenario where two sources communicate with the help of a single relay, modelled as a half‐duplex butterfly network. Closed‐form expressions of the outage probabilities are derived in the high signal‐to‐noise ratio (SNR) regime for the orthogonal amplify‐and‐forward and non‐orthogonal amplify‐and‐forward protocols. Then the expressions are approximated to enable power allocation. Closed‐form power allocation schemes are proposed for each protocol, where only statistical channel knowledge is required. It is shown that the authors analyses match well with simulation results and the approximated versions are very close to the simulation results. The proposed power allocation schemes achieve a large SNR gain over the equal‐power strategies and approach the optimal power allocation schemes.