Luoyang Electronic Equipment Testing Center

Luoyang, China

Luoyang Electronic Equipment Testing Center

Luoyang, China
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Zhou B.,Luoyang Electronic Equipment Testing Center | Kong D.,Luoyang Electronic Equipment Testing Center | Dai H.,Luoyang Electronic Equipment Testing Center | Wang J.,Luoyang Electronic Equipment Testing Center | Shen X.,Luoyang Electronic Equipment Testing Center
2016 IEEE International Conference on Ubiquitous Wireless Broadband, ICUWB 2016 | Year: 2016

The radio frequency (RF) spectrum is a limited resource. Spectrum allotment disputes stem from this scarcity as many radio devices are confined to a fixed frequency or frequency sequence. One alternative is to incorporate cognition within a reconfigurable radio platform, therefore enabling the radio to adapt to dynamic RF spectrum environments. In this way, the radio is able to actively observe the RF spectrum, orient itself to the current RF environment, decide on a mode of operation, and act accordingly, thereby sharing the spectrum and operating in more flexible manner. This research presents a novel framework for incorporating several techniques for the purpose of adapting radio operation to the current RF environment. © 2016 IEEE.


Rui Z.,PLA Air Force Aviation University | Bo Z.,Luoyang Electronic Equipment Testing Center | Lin L.,PLA Air Force Aviation University | Zhang X.,Luoyang Electronic Equipment Testing Center | Bin J.,Luoyang Electronic Equipment Testing Center
IET Conference Publications | Year: 2015

Because t he performance of traditional Gaussian cognitive radar(CR) system for target response varying from Gaussian will be degraded, this paper extended the Gaussian target response to arbitrary non-Gaussian target distribution. In this paper, the CR multiple hypothesis classific ation algorithm was used for non-Gaussian targets, and the sparse spectrum of correlated narrowband target responses was utilized. In addition, we simulated the multiple non-Gaussian distribution targets, and the simulation results demonstrate the non-Gaussian target classification algorithm is very effective.


Zhou B.,Luoyang Electronic Equipment Testing Center | Dai H.,Luoyang Electronic Equipment Testing Center | Wang Z.,Electronic Engineering Institute | Mo C.,Electronic Engineering Institute | Wang J.,Luoyang Electronic Equipment Testing Center
IET Conference Publications | Year: 2015

Monopulse radar antenna is one of the most exact electronic directional techonolgies now, and it is extensively used in microwave and millimeter wave tracking, survellian, communication, measurement and astronomical system. However, in order to protect t he radar antenna from environment's influence, lots of monopulse antennas all use radome, which will induce affect on antenna's polar ization characteristic. Taking the typical parabolic reflector monopulse radar seeker antenna as an example, the influence of radome on monopulse antenna cross polarization characteristic is simulated in different cases, and the reason of cross polarization induced by the antenna radome is analyzed, which provides the important theory basis for research on cross polarization electronic attacking technology to controdict monopulse tracking.


Chen Q.,PLA University of Science and Technology | Chen Q.,Luoyang Electronic Equipment Testing Center | Chen B.,PLA University of Science and Technology | Shi L.,PLA University of Science and Technology | And 2 more authors.
Physics of Plasmas | Year: 2015

The Rayleigh-Taylor (R-T) instabilities are important hydrodynamics and magnetohydrodynamics (MHD) phenomena that are found in systems in high energy density physics and normal fluids. The formation and evolution of the R-T instability at channel boundary during back-flow of the lightning return stroke are analyzed using the linear perturbation theory and normal mode analysis methods, and the linear growth rate of the R-T instability in typical condition for lightning return stroke channel is obtained. Then, the R-T instability phenomena of lightning return stroke are simulated using a two-dimensional Eulerian finite volumes resistive radiation MHD code. The numerical results show that the evolution characteristics of the R-T instability in the early stage of back-flow are consistent with theoretical predictions obtained by linear analysis. The simulation also yields more evolution characteristics for the R-T instability beyond the linear theory. The results of this work apply to some observed features of the return stroke channel and further advance previous theoretical and experimental work. © 2015 AIP Publishing LLC.


Chen Q.,Luoyang Electronic Equipment Testing Center | Chen Q.,PLA University of Science and Technology | Xu B.,PLA University of Science and Technology | Yi Y.,PLA University of Science and Technology | And 2 more authors.
2016 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization, NEMO 2016 | Year: 2016

Secular dynamics of charged particles in the vortex electromagnetic wave beam is widely used in many ranges. However, the conventional numerical schemes for this problem are failed when the charged particle velocities reach up to relativistic region. The coherent accumulation of numerical errors may destroy the simulation and introduce pseudo physics. To obtain an applicable numerical tool for secular dynamics of relativistic charged particles, R. L. Zhang et. al developed a volume-preserving algorithm (VPA) which has been successfully used in the magnetic confinement fusion research. In this work, we introduce the VPA to simulate the dynamics of charged particles in the vortex electromagnetic wave beam. A test particle model for electron in the classic Laguerre-Gaussian beam is constructed and a class of simulations is implemented. The electron evolution in the phase space is obtained which shows the orbital angular momentum effect of vortex electromagnetic wave beam. This type of simulation may lead to discovery of new physics in relevant fields. © 2016 IEEE.


Xia B.,Luoyang Electronic Equipment Testing Center | Chen B.,Changchun University of Science and Technology
Proceedings of IEEE International Conference on Grey Systems and Intelligent Services, GSIS | Year: 2013

In order to solver the high frequency (HF) skywave signal field intensity data influenced by ionosphere fast fading, the gross error discriminant formula based on GM(1,1) is used to eliminate the break data influenced by the ionosphere fast fading in this paper. By introducing modeling accuracy and distinguish threshold, the gross error discriminant formula can rationally eliminate gross error data from signal field intensity data. For illustration, a typical HF skywave signal field intensity data treatment example is utilized to show the feasibility of the gross error discriminant formula in reducing the influence of ionosphere fast fading and improving the processing accuracy. Empirical results show that the Rayleigh distribution characteristic changes between, before and after treatment directly illustrated by the effectiveness of the gross error discriminant formula. The gross error discriminant formula based on the GM(1,1) Model can effectively eliminate the break data influenced by the ionosphere fast fading and solve the problem of HF skywave signal field intensity data processing and analysis. © 2013 IEEE.


Zhou W.,LuoYang Electronic Equipment Testing Center | Ruan R.,Zhengzhou University | Ruan R.,Xian Research Institute Of Surveying And Mapping | Zhang H.,Zhengzhou University | Yao F.,LuoYang Electronic Equipment Testing Center
Lecture Notes in Electrical Engineering | Year: 2016

This paper reviews the history and evolution of the relative positioning based on the undifferenced (UD) observation. The internal mechanism of this method is explained by error division, that is, adopting the model of estimating quasi-clock parameter, which absorbs the unmodeled error of the receiver and the satellite to achieve the same effect of eliminating the common error explicitly by double differenced (DD) observation. With UD observation of Beidou Navigation Satellite System (BDS), various experiments are carried out to demonstrate the flexibility of the relative positioning mode presented, including network solution, static/kinematic baseline solution, and kinematic reference (kinematic for kinematic) solution. In the case of the experiment for network solution with baselines up to thousands of kilometers (2000–5000 km), precise post-processed orbit are used to cancel the influence of orbit errors, the repeatability within 1.1 cm in horizontal direction can be reached, the repeatability in vertical direction is less than 3 cm. The relative positioning precision of BDS on the condition of long baseline also needs to be improved because the phase center offset and variation of satellite antenna and receiver antenna have not been accurately calibrated, and there is still a gap of orbit precision between the current of BDS satellite and GPS. In the static baseline experiments, the broadcast ephemeris is adopted. For baseline of 800 m, the repeatability in horizontal and vertical are 3 and 8 mm, respectively, while for 30 km static baseline, they are 10 and 13 mm. In the experiments of kinematic baseline and kinematic reference solutions both horizontal and vertical precisions are in several centimeters; the latter is slightly worse because the coordinates of reference station are not accurate. © Springer Science+Business Media Singapore 2016.


Zhou W.,LuoYang Electronic Equipment Testing Center | Sun Z.,LuoYang Electronic Equipment Testing Center | Ren Y.,LuoYang Electronic Equipment Testing Center | Yao F.,LuoYang Electronic Equipment Testing Center
Lecture Notes in Electrical Engineering | Year: 2016

The aerospace TT&C system plays an important role in tracking spacecraft, and it is necessary for maintaining its good performance and precision. This paper focuses on the application of BeiDou satellite navigation system (BDS) in the precision verification of aerospace TT&C equipment, an algorithm model of the BDS kinematic relative positioning is proposed, and the feasibility of this algorithm is verified by an actual flight experiment. Based on above, the BDS precision verification system is constructed, and the composition, function, information interaction, and working principle of the system are introduced, several methods are studied such as kinematic relative positioning data processing method with BDS, data processing method for TT&C equipment and comparison analysis method, then a complete data processing flow is formed. Based on this system, the precision verification experiment of a TT& C equipment is completed, and various index of precision is obtained, which plays an important role in analyzing the performance of the aerospace TT&C equipment. © Springer Science+Business Media Singapore 2016.


Mo C.,Electronic Engineering Institution | Li J.,Electronic Engineering Institution | Dai H.,Luoyang Electronic Equipment Testing Center | Chen Q.,Electronic Engineering Institution | Zhao J.,Unit 95868 of PLA
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2015

According to existed experimental evaluation of radar electronic jamming simulation for terminal guidance, the ballistic calculation model was simplified relatively. Particle model was usually adopted which made simulation results have serious distortion. The pulse Doppler radar seeker was discussed in six degree of freedom trajectory simulation of the closed loop (PDRS) for coherent video simulation, and simulation results show that the VGPO has no direct effect on the angle tracking loop, just through guidance filter affects the convergence angle velocity estimation, which leads to little change of guidance precision. The conclusion and anechoic chamber measurements results show that the PDRS of coherent video model for 6 degree of freedom closed-loop trajectory simulation is accurate, which provides an effective and practical solutions for parameters designing and performance evaluation of tactical cruise missile. ©, 2015, Editorial Office of Journal of System Simulation. All right reserved.


Wang Y.,Luoyang Electronic Equipment Testing Center | Sun Z.,Luoyang Electronic Equipment Testing Center | Wang X.,Luoyang Electronic Equipment Testing Center
Journal of Geomatics | Year: 2015

This paper firstly introduces the theory of precise point positioning (PPP) and differential positioning briefly, then focuses on calculating the results of PPP and differential positioning with different ephemeris and clock correction by using WayPoint8.5 software, combining air dynamic GPS data of assignment of precision appraisal, and comparing the difference between the above results. The results show that the difference of the computed results between PPP and differential positioning is less than 80 cm. And we can not only compute the result of PPP using IGU ephemeris products, but also forecast the status of equipments for measurement and control.

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