Open AccessEnergy efficiency analysis of antenna selection multi‐input multi‐output automatic repeat request systems over Nakagami‐ m fading channels
Author(s) -
Le Ngoc Phuc,
Tran Le Chung,
Safaei Farzad,
Varma Vineeth Satheeskumar
Publication year - 2015
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.2014.0804
Subject(s) - nakagami distribution , mimo , fading , computer science , antenna (radio) , efficient energy use , energy (signal processing) , energy consumption , hybrid automatic repeat request , performance metric , metric (unit) , algorithm , precoding , telecommunications , mathematics , statistics , electrical engineering , channel (broadcasting) , decoding methods , engineering , telecommunications link , operations management , management , economics
In this study, the authors investigate energy efficiency in antenna selection multi‐input multi‐output automatic repeat request (MIMO ARQ) wireless systems. The authors first derive an approximate expression for the average frame‐error rate (FER) in antenna selection MIMO systems over quasi‐static Nakagami‐ m fading channels. The FER approximation is then used to obtain an analytical expression of an energy‐efficiency metric that is defined as the total energy required to successfully deliver one information bit. The authors prove that this energy‐efficiency metric is a quasi‐convex function with respect to the average signal‐to‐noise ratio value. Based on this analysis, the authors obtain the optimal value of the average energy per transmitted data symbol such that the total energy consumption in the system is minimised. The results show that the energy efficiency in antenna selection MIMO ARQ systems is improved when the number of equipped antennas is increased. Simulation results are provided to validate the analysis.