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In this paper, we propose a power allocation scheme to suppress the inter-cell interference (ICI) in multi-cell multiuser multiple-input-multiple-output (MU-MIMO) systems. In particu-lar, by adopting relaxed signal-to-leakage-and-noise ratio (SLNR) beamforming, the transmit power allocated to the user is linearly associated with the leakage, which differs from previous works. Furthermore, we obtain...
In order to fully benefit from multiple-input multiple-output (MIMO) channels, multiuser techniques are adopted in the 3rd generation partner project (3GPP) long term evolution (LTE) downlink system. The core task of multiuser MIMO system is to suppress multiuser interference and enhance the signal to interference plus noise ratio (SINR). As a classical MIMO scheme, block diagonalization (BD) algorithm...
In this paper, an SLNR-based scheduling method is proposed in the MU-MIMO broadcast channel with finite rate feedback. In the proposed scheme, a user's leakage power to others is an important factor to determine whether the user should be selected. The sum rate of the proposed SLNR scheme and the traditional SINR-based scheme are compared with different system parameter settings. Simulation results...
In this paper, we propose a joint user pairing and precoding scheme in MU-MIMO broadcast channel with limited feedback. In the proposed scheme, each user feeds back its preferable precoding vector index and two scalars denoting quantization error and the largest singular value of channel matrix, respectively. Base station (BS) selects the first user who has highest estimated SINR, and generates a...
Coordinated multiple point transmission and reception (CoMP) has attracted a lot of attention recently because of its potential for multi-cell co-channel interference (CCI) mitigation and spectral efficiency increase. CoMP inevitably requires increased signaling overhead and inter-base communication. Therefore in practice, only a limited number of Base Stations (BS) can cooperate with acceptable overhead...
In this article, a novel dual codebook based multi-user multiple-input multiple-output (MU-MIMO) precoding and scheduling scheme with limited feedback for downlink transmission is proposed. The proposed dual codebook based MU-MIMO scheme utilizes the first codebook for limited feedback and the second codebook for scheduling and precoding for multiple users at the BS. This paper explores a simplified...
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