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.


Mo C.,Electronic Engineering Institution | Dai H.,Luoyang Electronic Equipment Testing Center | Chen Q.,Electronic Engineering Institution | Wang Z.,Electronic Engineering Institution | Zhao J.,Unit 95868 of PLA
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2016

The current research on coherent jamming of mono-pulse pulse Doppler (PD) seeker focuses on coherent dual point-sources jamming, which is based on the particle model to produce jamming signal. Accordingly, the simulation system to verify jamming efficiency is simplified to functional simulation. However, when the target under protection is an extended one, the jamming method based on particle model is invalidated. To solve this problem, a novel coherent jamming method based on extended target model is proposed. According to the 3D CAD model of ship targets, the high resolution range profile (HRRP) templates at full azimuth angles are calculated. The jamming signals coherent with echoes are by convolution HRRP templates to radar transmitted signals, which fully preserves target property modulation information on signal phase. In order to evaluate the effect, the PD seeker is discussed in six degree of freedom trajectory simulation of the closed loop (PDRS) for coherent video signal level. Experiment result shows that the proposed method has better angle deception jamming effect which produces the jamming signal by using target range profile to approximate target scattering function. The azimuth and elevation frame angle error can reach up to about ten degree level. Copyright © 2016 by Editorial Department of Chinese Journal of Radio Science


Hu S.,PLA University of Science and Technology | Gao T.,PLA University of Science and Technology | Li H.,PLA University of Science and Technology | Yang B.,PLA University of Science and Technology | And 3 more authors.
Guangxue Xuebao/Acta Optica Sinica | Year: 2017

In order to decrease computational time and computer memory consumed by the serial multi-resolution time-domain (MRTD) scattering model, a parallel calculation model for nonspherical aerosol scattering is proposed based on message passing interface (MPI) technique. A basic frame of the MRTD scattering model and two parallelization data communication schemes are introduced, and the parallel design for MRTD scattering model is achieved by MPI repeated non-blocking communication technique. A network parallel computation platform is established for the parallel calculation. To validate the computational accuracy of the MRTD scattering model, the simulation results of parallelized MRTD scattering model are compared with that of Mie scattering model and T Matrix method. The results show that the MRTD model can calculate the scattering parameters of nonspherical particles accurately. Parallel computational technique can improve computation efficiency notably. The computation efficiency of the parallelization design scheme that exchanges electric field and magnetic field simultaneously is higher than that of the scheme that exchanges magnetic field simply. With increasing the number of central processing unit cores, the parallel acceleration ratio of program is incresing, while the computational efficiency of single processor is slightly decreasing. With the increasing of particle size parameter, the computational efficiency of single processor is increasing as well. It also can be found that the change of complex refractive index has no notable influence on parallel computational efficiency. © 2017, Chinese Lasers Press. All right reserved.


Gao L.-Y.,National Digital Switching System Engineering Technical Researching Center | Gao L.-Y.,Luoyang Electronic Equipment Testing Center | Zheng N.-E.,National Digital Switching System Engineering Technical Researching Center | Song X.-Y.,National Digital Switching System Engineering Technical Researching Center | Yang S.,National Digital Switching System Engineering Technical Researching Center
2016 2nd IEEE International Conference on Computer and Communications, ICCC 2016 - Proceedings | Year: 2017

In recent years, some researchers introduce the resource allocation into the MIMO (Multiple Input Multiple Output) radar, the concept of which has been proposed for about 10 years. In this paper, we firstly analyze the signal model in MIMO radar and the influence of resource allocation on multiple targets localization; then we review the present research on resource allocation in MIMO radar briefly, in which the CRLB (Cramer-Rao Lower Bound) and non-convex optimization get a key attention; last but not the least important, we point out the problems worthy of further study on resource allocation in MIMO radar. © 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.


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.


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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