Interference management is of paramount importance in heterogeneous massive mimo networks (HetNet). In this paper, an algorithm has been suggested to suppress the interference large-MIMO HetNets with imperfect channel state information(CSI). The proposed technique controls both intra-tier and cross-tier macrocell as well small cells. have minimized under maximum transmission power minimum signa...

This paper presents a joint scheduling, beamforming, and resource allocation algorithm for multi-user wireless networks affected by co-channel interference. The analysis considers a network with one base station (BS) that uses a multiple antenna transmitter (beamformer) to schedule (in a time-division manner) transmissions towards a set of $J$ one-antenna terminals in the presence of $K$ persis...

This paper studies the user selection problem for a cooperative nonorthogonal multiple access (NOMA) system consisting of base station, far user, and N near users. The selected receives its own message assists by relaying user’s message. Firstly, we propose strategy to maximize data rate while satisfying quality-of-servi...

The implementation of Tomlinson-Harashima (TH) pre-coding for multiuser MIMO systems based on quantized channel state information (CSI) at the transmitter side. Compared with the results in [1], our scheme applies to more general system setting where the number of users in the system can be less than or equal to the number of transmit antennas. We also study the achievable average sum rate of t...

With perfect channel state information (CSI) at the receiver and/or transmitter, multiple-input multiple-output (MIMO) wireless systems exhibit a large capacity improvement over their single-input single-output (SISO) counterparts. However, when the MIMO channel is time variant, CSI is either imperfect or unavailable, leading to severe reductions in the available capacity [1]. Although a few st...