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The resource allocation problem for the downlink of Orthogonal Frequency Division Multiple Access (OFDMA) wireless multicast systems is investigated. It is assumed that the Base Station (BS) consists of multiple antennas in a Distributed Antenna System (DAS), whereas each user is equipped with a single antenna. The allocation unit is not the subcarrier, as in conventional OFDMA systems, but a set...
Multiple Input Multiple Output (MIMO) antennasystems are being used to increase the spectral efficiency for the next generation of wireless networks (LTE, WiMAX). In this paper we focus on beamforming techniques for the downlink channel. In particular, we consider the problem of downlink user selection to maximize the downlink resources while satisfying the QoS requirements of all users. We do this...
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