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Sun X.-Y.,Nanjing University of Information Science and Technology | Sun X.-Y.,Jiangsu Key Laboratory of Meteorological Observation and Information Processing | Sun X.-Y.,Nanjing University of Aeronautics and Astronautics | Zhou J.-J.,Nanjing University of Aeronautics and Astronautics | Chen H.-W.,Nanjing University of Aeronautics and Astronautics
Multidimensional Systems and Signal Processing | Year: 2016

Conventional direction-of-arrival (DOA) estimation methods for coherent noncircular signals may reduce the effective aperture of sensor arrays and thus have low estimation accuracy. To address this problem, a low complexity algorithm for DOA estimation of noncircular coherent signals, the extended ESPRIT-like (EEL) algorithm, is proposed in this paper. The proposed EEL algorithm has fully utilized the effective array aperture and the number of the sources that can be detected by the proposed algorithm now can attain the two-third of the total number of the impinging sources. Compared with the existing DOA estimation methods for noncircular coherent signals, the proposed EEL algorithm has lower computational complexity and higher DOA estimation accuracy. Simulation results are presented to show the superior performance of the proposed method. © 2014, Springer Science+Business Media New York. Source


Chen X.,Nanjing University of Information Science and Technology | Chen X.,Jiangsu Key Laboratory of Meteorological Observation and Information Processing
Advances in Intelligent and Soft Computing | Year: 2012

China universities and colleges characteristic specialty construction is an important method to optimize the professional structure, improve the quality of personnel training, and professional characteristics. Based on construction of national characteristic specialty in Electronic and Information Engineering of Nanjing University of Information Science and Technology, this paper introduced its specialty training objectives and positioning, and proposed building program. We proposed specific reforms and innovative measures from eight aspects, i.e., the conciseness of the professional characteristics, teachers team construction pattern, personnel training model, deepening of curriculum development, enrich the content of practice teaching, improvement of the scientific research, consummating of teaching management system, and internationalization education. This is suited to the requirements of the new century training model, forming significant professional characteristics. © 2012 Springer-Verlag GmbH. Source


Li J.,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters | Li J.,Jiangsu Key Laboratory of Meteorological Observation and Information Processing | You X.,Hubei University | Ge J.,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters | And 2 more authors.
Microwave and Optical Technology Letters | Year: 2016

A compact multiple-input and multiple-output (MIMO) monopole antenna system for WLAN (2.45 GHz) with enhanced isolation is proposed. The proposed MIMO antenna system consists of two identical monopole antenna elements operating at the same frequency of 2.45 GHz. In order to improve the isolation performance, each antenna element is individually placed on one side of the substrate. With meandered strips, the size of the proposed antenna system is dramatically decreased to 15.9 mm × 9 mm. The isolation between the two antenna elements exceeds 18.29 dB by employing the orthogonal polarization diversity technique and the physical isolation method. The 10 dB bandwidth of the proposed antenna system reaches 120 MHz, which is wide enough for the practical application. Measured results are in close agreement with the simulated ones. © 2016 Wiley Periodicals, Inc. Source


Wang H.-B.,Nanjing University of Information Science and Technology | Zhou X.-Y.,Jiangsu Key Laboratory of Meteorological Observation and Information Processing | Zhou X.-Y.,Nanjing University of Information Science and Technology | An X.-X.,Nanjing University of Information Science and Technology | And 2 more authors.
International Journal of Theoretical Physics | Year: 2016

A scheme for the deterministic joint remote preparation of a four-qubit cluster-type state using only two Greenberger-Horne-Zeilinger (GHZ) states as quantum channels is presented. In this scheme, the first sender performs a two-qubit projective measurement according to the real coefficient of the desired state. Then, the other sender utilizes the measurement result and the complex coefficient to perform another projective measurement. To obtain the desired state, the receiver applies appropriate unitary operations to his/her own two qubits and two CNOT operations to the two ancillary ones. Most interestingly, our scheme can achieve unit success probability, i.e., Psuc=1. Furthermore, comparison reveals that the efficiency is higher than that of most other analogous schemes. © 2016 Springer Science+Business Media New York Source


Lu F.,Nanjing University of Information Science and Technology | Chen X.,Nanjing University of Information Science and Technology | Chen X.,Jiangsu Key Laboratory of Meteorological Observation and Information Processing
Advances in Intelligent and Soft Computing | Year: 2012

Scene change occurs frequently in the video, which has an important impact on the video quality. The JVT-G012 rate control algorithm for H.264/AVC uses fixed-length group of picture structure, which can not effectively deal with the video sequence scene change, resulting in the quality decline of frames after scene change. We reviewed the scene change-based H.264 rate control methods in this paper. They are classified into two categories-scene change detection-based rate control method and scene adaptive rate control method. A comparative study of the interaction and discussion about the various algorithms and their advantages and disadvantages are presented. Based on these research results, some improvedment are discussed. © 2012 Springer-Verlag GmbH. Source

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