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Fan N.,PLA University of Science and Technology | Fan N.,Institute of China Electronic System Engineering Corporation | Zhang J.,Institute of China Electronic System Engineering Corporation | Zhang Y.-L.,Institute of Applied Meteorology | Fan K.,ZhongWei Meteorological Bureau
Proceedings - 2014 International Conference on Wireless Communication and Sensor Network, WCSN 2014 | Year: 2014

The performance of beam forming in amplify-and-forward relay networks, where the source-relay and the relay-destination channels experience correlated Nakagami-m and correlated Rician fading, is investigated. Based on the cumulative distribution function of the signal-to-noise ratio at the receiver, the exact closed-form expression for the average symbol error rate is derived. Numerical results are presented to demonstrate the efficacy of our performance analysis, also illustrate the impact of the channel correlation, fading severity, Rician factor and antenna configuration on the performance of the system. © 2014 IEEE.

Huang H.,Institute of Applied Meteorology | Huang H.,PLA University of Science and Technology | Deng B.,Institute of Applied Meteorology | Chen Y.-S.,Institute of Applied Meteorology | Liu J.,Institute of Applied Meteorology
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2012

In recent years, the numerical wave tanks are widely applied in the study of ocean engineering problems, and become the focus of water wave mechanics research. Based on Navier-Stokes (N-S) equations, a 2D numerical wave tank was built. The N-S governing equations were discretized by Finite Volume Method (FVM), the incident wave was generated from the boundary by simulating piston wave-maker motions, Volume of Fluid (VOF) method was used to catch the nonlinear free surface, and the outgoing waves were dissipated in an artificial damping zone at the rear part of the wave tank. Then, typical nonlinear 2nd Stokes wave was simulated in this 2D numerical wave tank, and its arising, developing and dissipating were committed to memory of virtual wave height monitors. Comparison and validation show that, all the simulation results match theoretical results well. © Right.

Huang H.,PLA University of Science and Technology | Huang H.,Institute of Applied Meteorology | Lu H.-C.,PLA University of Science and Technology | Xu Y.-P.,Institute of Applied Meteorology | Deng Z.-W.,Institute of Applied Meteorology
Jiefangjun Ligong Daxue Xuebao/Journal of PLA University of Science and Technology (Natural Science Edition) | Year: 2012

Inview of the serious influence of wind disturbance on unmanned aerial vehicle (UAV), a comprehensive investigation and quantitative analysis is necessary. Choosing a detect/scout UAV as the representative, firstly the models of mean wind and turbulence variable in the boundary layer of China and the circumjacent district were built, based on the NCEP reanalysis data from 1948 to 2010. Then a digital virtual model of UAV, including nonlinear 6-DOF model, control system and INS/GPS navigation system, was developed in Matlab/Simulink environment. Finally, under the ideal condition and the wind disturbance, the characteristic cruise/scout flight cases were simulated, quantitative results of the flight path/attitude and control reaction were present, and the influences of the wind disturbance were evaluated in detail. The results indicated that, the wind disturbance had a great influence upon INS navigation system. Accumulated error rose steadily as time passed. At the same time, the control/navigation system based on GPS showed enough flexibility and robust in the wind field.

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