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Cellular heterogeneous networks (HetNets) with densely deployed small cells can effectively boost network capacity. The co-channel interference and the prominent energy consumption are two crucial issues in HetNets which need to be addressed. Taking the traffic variations into account, in this paper, the performances of HetNets with joint further-enhanced inter-cell interference coordination (FeICIC)...
In this paper, the spatial modulation (SM) technique is employed at the source and relay nodes in a full-duplex two-way relay channel (FD-TWRC) to support spectral-efficient bi-directional communications while guaranteeing a low cost implementation. Maximum likelihood detectors are employed at each node that is subject to an intrinsic self-loop interference. We first propose a tight upper bound on...
Interference nulling (IN) is a linear precoding tech-nique for downlink multiuser multiple-input multiple-output(MU-MIMO) systems. With perfect channel knowledge at the transmitter, IN eliminates other users' interference at each cell, thus improving the sum rate of the users in the system. To evaluate its suitability in a multicell setup, we have implemented the real-time system based on IN as well...
Multi-cell MIMO technique theoretically promises large improvement in spectral efficiency and fairness in cellular networks and is regarded as the key enabling technique for solving the troublesome issue of inter-cell interference. To evaluate its practical performance in the cellular network, we have implemented the real-time downlink multi-cell MIMO trial system operating over bandwidth of 20 MHz...
Partial discharge (PD) is one of the most important factors in shortening the service life of the insulation. However, it is much difficult to detect PD signal under pulse-width modulation (PWM) voltages. In this paper, signal processing model is put forward to study the factors influencing PD signal processing under square voltages based on wavelet analysis. Slew rate is an important factor influencing...
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