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On the MU-MIMO broadcast channel, Per-User Unitary and Rate Control (PU2RC) as a practical design is proposed for emerging cellular standards in 3GPP LTE. Unfortunately, when the number of users is small, the performance of PU2RC would be degraded with the increase of codebook size. In this paper, we propose an efficient user scheduling scheme to overcome this defect in PU2RC by enlargement of user...
In this paper, we propose a new joint user scheduling and beamforming scheme based on coordinated beamforming (CBF), as called orthogonal linear coordinated beamforming (OLCBF) for multiuser multiple-input multiple-output (MU-MIMO) systems. With the assumption that a single information stream is transmitted to each user, the base station (BS) may select a subset of users from a large number of users...
In this paper, we propose a joint TX-RX user scheduling (JTRUS) scheme for MU-MIMO systems. It assumes that the BS has perfect channel state information (CSI) of all the downlink channels and the user terminal only has the CSI of its own downlink channel. Providing some kind of codebook has stored in both the BS and the user terminals. User terminals gather the index of codeword which has the maximum...
With enough channel state information feedback, the close-loop multiple-input multiple-output (MIMO) yields large improvements in the system performance. Usually, it is divided into two main areas. One is codebook based precoding (CBP), and the other is non-codebook based precoding (NBP). For the channel reciprocity property, the eigen-based beamforming (EBB) is a promising case in the NBP group....
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