The 63rd Research Institute of the PLA General Staff Headquarters

Nanjing, China

The 63rd Research Institute of the PLA General Staff Headquarters

Nanjing, China

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Cao J.-J.,The 63rd Research Institute of the PLA General Staff Headquarters | Diao X.-C.,The 63rd Research Institute of the PLA General Staff Headquarters | Du Y.,China Electronic System Engineering Company | Wang F.-X.,The 63rd Research Institute of the PLA General Staff Headquarters | Zhang X.-Y.,The 63rd Research Institute of the PLA General Staff Headquarters
Binggong Xuebao/Acta Armamentarii | Year: 2010

In order to realize detection of approximately duplicate records, a classification method based on feature selection using ant colony algorithm was proposed. The detection of approximately duplicate records can be regarded as a classification problem of two classes. The similar feature and normalization algorithm of three typical attribute types, such as character string, enumeration and date, were defined. Taken the similar feature vectors of two records as the classifier's input, the detection of approximately duplicated records was realized. A multi-object optimization model based on comprehensive optimization of recall rate, precision and feature set's size was set up. According to the characteristics of the problem, the multi-object optimization model was transfered into a single object optimization model. A solving algorithm using ant colony algorithm was designed. Finally, the method was validated by Euclidean distance classifier and support vector machine classifier.


Hu H.-B.,The 63rd Research Institute of the PLA General Staff Headquarters | Hu H.-B.,PLA Unit 94860 | Chen J.-Z.,The 63rd Research Institute of the PLA General Staff Headquarters | Jiang Y.-J.,Air force Radar Academy
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2010

For the engineering application, this paper studies the method of extracting terrain profiles arbitrarily from the Globe maps for the radio wave propagation on the path. Radar wave propagation losses on arbitrary terrain are also computed by using the parabolic equation model. Based on the computation, the omni directional survey scope of monostatic radar for a specific target height is calculated. The research overcomes the shortcoming of geometrical optical method which can not give an accurate terrain modeling and lead to a suspectable calculation conclusion. The paper offers a new approach to predict the radar coverage and blind area effectively. ©2010 by Editorial Department of Chinese Journal of Radio Science.


Li Y.,PLA University of Science and Technology | Li Y.,The 63rd Research Institute of the PLA General Staff Headquarters | Yao F.-Q.,The 63rd Research Institute of the PLA General Staff Headquarters | Guan S.-Y.,The 63rd Research Institute of the PLA General Staff Headquarters | Xu B.,The 63rd Research Institute of the PLA General Staff Headquarters
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | Year: 2015

The signal of the differential frequency hopping system has a broadband when it hops, and has a narrowband in each hop. This paper proposes a frequency domain equalization algorithm for the differential frequency hopping system, i.e., the multi-hopping frequency domain equalization algorithm based on the least-mean-square. The shortages of the frequency domain equalization algorithm based on minimum mean square error criteria and the least-mean-square frequency domain equalization algorithm are analyzed, and then the multi-hopping frequency domain equalization algorithm is proposed based on the least-mean-square for the differential frequency hopping system. The algorithm design and its structure are given in detail. The simulation result shows that the proposed algorithm is very efficient to equalize the channel for the differential frequency hopping system over a frequency-selective fading channel, and can improve the BER performance of the frequency hopping system. ©, 2015, Chinese Institute of Electronics. All right reserved.


Sun G.,PLA University of Science and Technology | Wang R.,The 63rd Research Institute of the PLA General Staff Headquarters | Pu T.,PLA University of Science and Technology | Wei Z.,PLA University of Science and Technology
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2012

A novel dual-wavelength (DW) sampled fiber Bragg grating (FBG) is proposed. Phase shift between two adjacent FBG units is achieved by increasing direct current (DC) refractive index of FBG. The FBG with only identical ±1 order reflective spectrum is optimized with cosine sampling function. This method has the advantages of flexible wavelength design, low fabrication precision and low cost. Comparison between uniform DC phase shift FBG, sample DC phase shift FBG and traditional discrete phase shift FBG is made. Uniform DC phase shift FBG and sample DC phase shift FBG are fabricated, which show a good agreement with theory. DW filter with channel spacing 0.08 nm is fabricated, and the experiment results verify the feasibility of this proposed method.


Tan M.-C.,PLA University of Science and Technology | Diao X.-C.,PLA University of Science and Technology | Diao X.-C.,The 63rd Research Institute of the PLA General Staff Headquarters | Cao J.-J.,The 63rd Research Institute of the PLA General Staff Headquarters | Feng J.,PLA University of Science and Technology
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | Year: 2014

For data generation problems with functional dependency (FD) consistency, directed acyclic graph (DAG) was used to model FDs set, an algorithm of tuple generation with single FD (TGSFD) was proposed to generate data consistent with single FD, an attributes sorting algorithm was proposed to solve the data generation problems with multi FDs. In order to utilize pipelining technique to improve the efficiency of data generation, a concept of minimal independent attributes subset (MIAS) was proposed and the attributes set partitioning algorithm was given. Experiments results show that TGSFD and attributes sorting algorithm can guarantee the FD consistency of generated data, while MIAS and pipeline technique can improve the efficiency of data generation.


Sun G.-D.,PLA University of Science and Technology | Zheng J.-L.,PLA University of Science and Technology | Wang R.,The 63rd Research Institute of the PLA General Staff Headquarters | Pu T.,PLA University of Science and Technology | And 3 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2012

The combination of coupled mode theory (CMT) and transmission matrix method (TMM) is a common tool for analyzing complex fiber Bragg grating (FBG) spectra. The CMT is modified by combining phase and chirp distributions of superimposed FBG (SIFBG). Precise and simple refractive index modulation expression of SIFBG is obtained. With the help of TMM, the spectrum characteristics of uniform, same chirped, different chirped and multiple same chirped SIFBGs are obtained with the above results. The applications of SIFBGs are generalized briefly. Uniform and same chirped SIFBGs are fabricated and measured. The experiment results basically match with the simulations, which proves the validity of this method.


Yu M.,PLA University of Science and Technology | Yu M.,The 63rd Research Institute of the PLA General Staff Headquarters | Wang Y.-H.,Zhejiang University | Wang G.-F.,PLA University of Science and Technology
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | Year: 2013

According to the approximately statistical independence between the frequency hopping (FH) signal and the partial-band noise jamming (PBNJ) signal, a blind source separation (BSS) based anti-jamming method for FH communication against PBNJ is proposed. The object function is constructed with the second order statistics or the higher order statistics of the separated signals. The unmixing matrix is calculated through the iterations which are induced by the object function. Then, the separation between the FH signal and the PBNJ signal is achieved, and the anti-jamming ability of FH communication is enhanced. Simulation results indicate the proposed method can improve the bit error rate of FH communication greatly when the PBNJ signal exists. The processing delays of the separation algorithm are very small. And the proposed method can satisfy the practical demand of FH communication well.


Cao J.,The 63rd Research Institute of the PLA General Staff Headquarters | Ma H.,Yellow River Conservancy Technical Institute | Jiang D.,No 71282 Unit Of The Pla
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2015

The evaluation of weapons system of systems is an important link in the development of weapons system of systems. It is in the development stage and lacks complete theoretical system and systemic research achievement. Based on improving tentatively the evaluation indexes in evaluation of weapons system of systems, the new strategy of evaluation analysis was proposed by fuzzy mathematics theory. It did not only consider adequately the influence by the evaluation objective, but also built the models of comprehensive evaluation for each link in evaluation process and designed the flow chart for programming. It provided a systemic feasibility report to realize the evaluation of weapons system of systems. ©, 2015, Chinese Association for System Simulation. All right reserved.


Xu L.-Y.,Nanjing University of Aeronautics and Astronautics | Xu L.-Y.,The 63rd Research Institute of the PLA General Staff Headquarters | Zhang X.-F.,Nanjing University of Aeronautics and Astronautics | Xu Z.-Z.,Nanjing University of Aeronautics and Astronautics | Yu M.,The 63rd Research Institute of the PLA General Staff Headquarters
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | Year: 2012

A novel joint 4-Dimensional (4-D) angle and Doppler frequency estimation algorithm is proposed for bistatic MIMO radar with L-shaped arrays. The DOA matrix method is used to construct the date model and then the close-form solution of the two dimensional DOA, the two dimensional DOD and Doppler frequency can be obtained. The proposed algorithm requires no searching spectral peak, and the estimated five dimensional parameters of the targets can be paired automatically. The proposed algorithm has very close parameters estimation to ESPRIT algorithm which has a much higher complexity than the algorithm. The method can eliminate the effect of the spatial colored noise and it is applicable even if the transmitted waveforms are not entirely orthogonal. The simulation results verify its effectiveness.


Xu L.,Nanjing University of Aeronautics and Astronautics | Xu L.,The 63rd Research Institute of the PLA General Staff Headquarters | Zhang X.,Nanjing University of Aeronautics and Astronautics | Xu Z.,Nanjing University of Aeronautics and Astronautics | Yu M.,The 63rd Research Institute of the PLA General Staff Headquarters
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2012

A novel joint angle and frequency estimation algorithm for acoustic vector sensor array is presented in this paper. The output signal of the acoustic vector array is analyzed and the result shows that it has parallel factor quadrilinear model characteristics. The source parameters can be estimated from the resultant matrices via low-rank decomposition that utilizes the uniqueness of PARAFAC decomposition. The algorithm firstly uses parallel factor quadrilinear decomposition algorithm to estimate the direction and frequency matrices; secondly the frequencies and direction of arrivals(DOAs), are estimated according to the structural characteristics of the matrices and least square principle. Compared with traditional algorithm, the method which doesn't require multidimensional searching spectral peak or parameter pairing, has higher estimation precision of the parameters, and has certain application value in engineering. Simulation and experiment results verify the effectiveness of the proposed algorithm.

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