[KlO13] Reduced feedback load with User Selection Algorithms for the Multiuser MISO Systems

Revue Internationale avec comité de lecture : Journal transactions on emerging telecommunications technologies (ETT) , vol. 24(7-8), pp. 809-819 , 2013, (doi:10.1002/ett.2557)
Résumé: For wireless multiuser multi-input single-output communication systems with adaptive scheduling and precoding, the users have to feed back their channel state information. However, the amount of feedback data increases with the number of users and the number of transmit antennas. In this paper, we propose a criterion based on the orthogonality between the users’ channels to reduce this uplink load. Without cooperation between the users, we only allow users that are semi-orthogonal to feed back their quantized channel information to the base station. We propose a lower bound on the sum rate for the proposed criterion. We show that the performance is almost independent of the number of quantized channel quality information and only channel direction information is important at the transmitter. Then, we consider a noisy feedback channel and propose an algorithm to reduce the noise effect on the analogue feedback


@article {
title="{Reduced feedback load with User Selection Algorithms for the Multiuser MISO Systems}",
author="H. Khanfir and D. le Ruyet and B. Ozbek",
journal="transactions on emerging telecommunications technologies (ETT) ",
pages="809-819 ",