Xiaotao Ren

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—Joint Transmission (JT) as an example of downlink coordinated multi-point (CoMP) transmission can improve the overall system performance, particularly the coverage of high throughput and cell-edge throughput. Many studies are related to JT in homogeneous network and based on full buffer traffic which is not a practical scenario. We propose a JT method for(More)
—This paper is concerned with inter-cell interference in co-channel Long-Term Evolution-Advanced (LTE-A) small-cell networks (SCNs). A practical SCNs architecture with small-cell group muting (SCGM) is proposed to mitigate the interference between the hosting macro-cell and small-cells as well as interference between adjacent small-cells. Lower power(More)
—Interference alignment scheme for multiple-in multiple-out (MIMO) cellular networks is discussed in this paper. An enhanced relay-aided interference alignment (eRIA) scheme is proposed. To align the interference, the scaling coefficients at relay is designed carefully and the design criterions of eRIA are given. The achievable degrees of freedom (DoF) of(More)
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