Title :
Low-complexity power allocation schemes for the downlink of nonregenerative cooperative multi-user MIMO communication system
Author :
Heliot, Fabien ; Hoshyar, Reza ; Tafazolli, Rahim
Author_Institution :
Centre for Commun. Syst. Res. (CCSR), Univ. of Surrey, Guildford, UK
Abstract :
Amplify-and-forward (AF) is one of the most popular and simple approaches to transmit information over a cooperative multi-input multi-output (MIMO) relay channel. In this paper, we propose two novel power allocation methods for the downlink of multi-user multi-input multi-output AF cooperative system, which are designed to optimise the sum-rate of the cooperative system according to the weighted sum-rate criterion. The main optimisation problem is not concave and our two methods aim at simplifying it in order to turn it into a concave problem, which can then be easily solved.
Keywords :
MIMO communication; amplify and forward communication; cooperative communication; multi-access systems; amplify and forward communication; cooperative multi-input multi-output relay channel; low complexity power allocation; nonregenerative cooperative multiuser MIMO communication system; sum-rate optimisation; Cooperative systems; MIMO; Matrix decomposition; Relays; Resource management; Tin; Cooperative communication; amplify-and-forward; downlink; multi-input multioutput; multi-user;
Conference_Titel :
Future Network and Mobile Summit, 2010
Conference_Location :
Florence
Print_ISBN :
978-1-905824-16-8
