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Coordinated beamforming (CBF) or coordinated scheduling is regarded as an effective means of mitigating the intercell interference (ICI) in orthogonal frequency-division multiplexing (OFDM) systems. In this paper, a new CBF scheme is presented based on leakage-controlled minimum-mean-square-error (LC-MMSE) precoding. We use a regularized factor to maximize the signal-to-interference-plus-noise-ratio...
The Physical Downlink Control Channel (PDCCH) is used to signal dynamic resource assignment information in the Long Term Evolution (LTE) system. In the presence of numerous active users, the system performance is likely to be hindered by shortage of control channel resource. In this paper, several simple algorithms are brought forward for making efficient PDCCH resource allocation. We first propose...
Installing multiple antennas at user equipments (UEs) may pose great challenges. In virtual multiple-input multiple-output (MIMO) concept, multiple single-antenna UEs can be grouped to transmit signals at the same time. Their signals can be separated at the base station (BS) by the same methods already used in conventional point-to-point MIMO scenarios. An important problem in virtual MIMO application...
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