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Non-Orthogonal Multiple Access (NOMA) is a key multiple access technique for 5th generation (5G) mobile communication systems. In this paper, we propose a capacity-based user selection (NOMA-CUS) algorithm for multiuser multiple input single output (MISO) downlink NOMA system with zero-forcing beamforming. NOMA-CUS algorithm improves the sum rate of the NOMA system by selecting the users in each cluster...
In this paper, a two-stage opportunistic interference alignment (OIA) algorithm is proposed for the downlink multi-cell multi-user multiple-input-multiple-output (MU-MIMO) system. Two precoders/postcoders are used at each transmitter/receiver respectively to combat interference. The inner precoder/postcoder pair are used to cancel out the inter-cell interference (ICI) using perfect IA approach, while...
In this paper, we propose a new setup for a cooperative multi-relay non-orthogonal multiple access scheme (CMR-NOMA) to enhance the downlink performance of non-orthogonal multiple access, while operating in severe fading. We compare the performance of the proposed scheme to an existing cooperative non-orthogonal multiple access scheme (CNOMA) in terms of the user-average bit error rate, the ergodic...
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