Showing papers by "Congzheng Han published in 2018"
TL;DR: Based on the magnetic fields recorded with a compact low-frequency (LF) magnetic sensor deployed at 78m distance from the channel base, the authors reconstruct the time-resolved current waveform for the continuously discharging processes in classical rocket-and-wire triggered lightning flashes, including the initial continuous current (ICC) and long continuing current.
10 citations
TL;DR: In the proposed scheme, BS can implement transmit antenna selection (AS) based on the instantaneous channel state information (CSI), thereby improving the system performance compared to the traditional FD relay networks and the superiority of proposed scheme compared with the conventional AF relay scheme is shown.
Abstract: This paper focuses on a full-duplex (FD) two-way relay network with one base station (BS), one FD amplify-and-forward (AF) relay, and one user, and the BS is equipped with massive multiple-input multiple-output (MIMO) antennas. To reduce the complexity and cost of BS, the paper proposes a practical antenna selection way in BS to complete transmission in two-way FD relay networks to optimize the system performance of outage probability or bit error ratio (BER). In the proposed scheme, BS can implement transmit antenna selection (AS) based on the instantaneous channel state information (CSI), thereby improving the system performance compared to the traditional FD relay networks. Furthermore, closed-form expressions for the outage probability and average BER are derived under Nakagami-m channels. The analytical results show that the superiority of proposed scheme compared with the conventional AF relay scheme and the correctness of the theoretical analysis verified by the Monte Carlo simulations.
10 citations
01 May 2018
TL;DR: In this article, the potential of using future millimeter wave based cellular networks for facilitating the high resolution and intensive environmental monitor in the near future, particularly for rainfall monitoring, is discussed.
Abstract: High-quality, and long-term observation of environmental conditions (e.g. rainfall and water vapour) at fine temporal and spatial resolution is of great important to meteorology, hydrology (e.g. flood warning), agriculture, environmental policy (e.g. pollution regulation) and weather forecasting. This work will discuss the potential of using future millimeter wave based cellular networks for facilitating the high resolution and intensive environmental monitor in the near future, particularly for rainfall monitoring.
2 citations