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Yuan L.,Shandong Institute of Business and Technology | Huilian C.,Institute of Electronic Engineering | Hui F.,Shandong Institute of Business and Technology | Da Y.,Shandong Institute of Business and Technology | And 2 more authors.
International Conference on Signal Processing Proceedings, ICSP | Year: 2010

Three-dimensional single-input-multiple-output synthetic aperture radar (SIMO-SAR) imaging method is proposed in this paper based on Capon adaptive beam-forming technology, and we have designed the downward-looking geometry architecture and signal echo model of the imaging system. Imaging algorithm is derived from the model and simulated. The advantages of three-dimensional imaging with SIMO-SAR are shown by the simulation results that it can get the height information of the targets besides the azimuth and range information, thus the targets can be located accurately and viewed in a stereogram. Furthermore, the algorithm can give better three-dimensional resolution. © 2010 IEEE.


Su C.,Institute of Electronic Engineering | Fang H.,Beijing Institute of Technology
2nd International Conference on Information Engineering and Computer Science - Proceedings, ICIECS 2010 | Year: 2010

To select the order (tap number) of feedforward filter of a fractionally spaced decision feedback equalizer (FS-DFE), the relationship between the order and the equalization performance was studied. Under the known channel characteristics, in variant signal noise ratio and order of feedforward filter, the optimal tap coefficients of FS-DFE was calculated with given algorithm, then the bit error rate performance was simulated using Monte Carlo method and compared with that of symbol spaced decision feedback equalizer (SS-DFE). Finally a method of how to select the order of FS-DFE feedforward filter based on simulation result was proposed and this method could be taken as a reference of FS-DFE engineering design. ©2010 IEEE.


Su C.,Institute of Electronic Engineering | Fang H.,Beijing Institute of Technology
2nd International Conference on Information Science and Engineering, ICISE2010 - Proceedings | Year: 2010

In order to select the tap number of feedforward filter of a fractionally spaced decision feedback equalizer (FS-DFE), the relationship between the order and the equalization performance was studied. Under the known channel characteristics, in variant signal noise ratio and order of feedforward filter, the optimal tap coefficients of FS-DFE was calculated with given algorithm, then the bit error rate performance was simulated using Monte Carlo method and compared with that of symbol spaced decision feedback equalizer (SS-DFE). Finally a method of how to select the order of FS-DFE feedforward filter based on simulation result was proposed and it could be taken as a reference of FS-DFE engineering design. © 2010 IEEE.


He G.,Chongqing University | He G.,Chongqing University of Science and Technology | Tang Y.,Chongqing University | Tang Y.,Chongqing University of Science and Technology | And 3 more authors.
Chinese Journal of Mechanical Engineering (English Edition) | Year: 2011

For the purpose of improving the precision of the inertial guidance system, it is necessary to enhance the accuracy of the accelerometer. Combining the micro-fabrication processes with resonant sensor technology, a high-resolution inertial-grade novel micro resonant accelerometer is studied. Based on the detecting theory of the resonant sensors, the accelerometer is designed, fabricated, and tested. The accelerometer consists of one proofmass, two micro leverages and two double-ended-tuning-fork (DETF) resonators. The sensing principle of this accelerometer is based on that the natural frequency of the DETF resonator shifts with its axial load which is caused by inertial force. The push-pull configuration of the DETF is for temperature compensation. The two-stage micro leverage mechanisms are employed to amplify the force and increase the sensitivity of the accelerometer. The micro leverage and the resonator are modeled for static analysis and nonlinear modal analysis via theory method and finite element method (FEM), respectively. The geometrical parameters of them are optimized. The amplification factor of the leverage is 102, and the sensitivity of the resonator on theory is about 62 Hz/g. The samples of the accelerometer are fabricated with deep reactive ion etching (DRIE) technology which can get a high-aspect ratio structure for contributing a greater sensing-capacitance. The measuring results of the samples by scanning electron microscopy (SEM) show that the process is feasible, because of the complete structure, the sound combs and micro leverages, and the acceptable errors. The frequency of the resonator and the sensitivity of the accelerometer are tested via printed circuit board (PCB), respectively. The result of the test shows that the frequency of the push-resonator is about 54 530 Hz and the sensitivity of the accelerometer is about 55 Hz/g. The amplification factor of the leverage is calculated more accurately because the coupling of the two stages leverage is considered during derivation of the analysis formula. In addition, the novel differential structure of the accelerometer can greatly improve the sensitivity of the accelerometers. Copyright © 2011 Chinese Journal of Mechanical Engineering.


Yu T.,Institute of Electronic Engineering | Yin C.,Institute of Electronic Engineering | Liu H.,Institute of Electronic Engineering
IEEE Transactions on Antennas and Propagation | Year: 2015

This communication presents a comprehensive numerical analysis of single microstrip antenna and antennas array in spherically layered media, using the method of moments (MoM). The curvilinear Rao-Wilton-Glisson (CRWG) triangular basis functions are employed to simulate the equivalent current on the antenna surface. First, the dyadic Green's functions using Debye potential are deduced. Then, their efficient computation procedures are carried out to improve calculation efficiency. Finally, the characteristic basis function method is employed to save memory and calculation time by reducing dimension of the impedance matrix. The results of this study are in good agreement with those of the FEKO software, and they show that the method proposed in this communication is more efficient than FEKO in the analysis process. © 2015 IEEE.


Song Y.,Institute of Electronic Engineering | Ma J.,Institute of Electronic Engineering | Feng Y.,Institute of Electronic Engineering | He N.,Institute of Electronic Engineering
Proceedings - 2012 5th International Conference on Intelligent Computation Technology and Automation, ICICTA 2012 | Year: 2012

In this paper, a kind of automatic monitor and control system of temperature and humidity parameter in greenhouse big awning based on CAN bus communication network and TMS320F2812 is designed, hardware architecture of CAN intelligence node and data acquisition system and software design are introduced. This node completed the realtime measuring, long-range transmission and control of the temperature and humidity by CAN-bus interface. © 2012 IEEE.


Wang J.,Institute of Electronic Engineering | Yin X.,Institute of Electronic Engineering | Li B.,Institute of Electronic Engineering
Lecture Notes in Electrical Engineering | Year: 2012

A tone signal recognition method based on eigenvalue decomposition was proposed in order to distinguish the tone signal from the modulation signals. The recognition of a tone signal was transformed into the problem of signal detection in complex Gauss white noise through converting the passband signal to the baseband signal. And based on the eigenvalue distribution of the covariance matrix, the decision variable was defined and the decision rule was constructed. Simulation results show that the method is effective. © 2012 Springer-Verlag GmbH.


Chen H.,Institute of Electronic Engineering | Zhu W.,Institute of Electronic Engineering | Zeng L.,Institute of Electronic Engineering | Cai X.,Institute of Electronic Engineering
Proceedings of 2016 IEEE Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2016 | Year: 2016

We propose a suboptimal multi-antennas selection (SMAS) scheme to enhance physical layer (PHY) security, due to the limitations of multi-input multi-output (MIMO) transmit antenna selection scheme in PHY security technologies. We consider that the channel state information (CSI) of wiretap channel is unknown to the transmitter, and select multi-antennas exploiting the suboptimal multi-antennas selection scheme. Next, we use water-pouring algorithm to assign the transmit power of each selected antenna at the transmitter and derive the expression of secrecy capacity. We prove the validity of the proposed scheme through simulating the received bit-error-ratio (BER) of the receiver and the eavesdropper, respectively. In contrast to the suboptimal antenna selection scheme which selects only one antenna at the transmitter, the proposed SMAS scheme selects multiple antennas and increases the secrecy capacity of the MIMO system numerically. © 2016 IEEE.


Wang J.,Institute of Electronic Engineering | Yin X.,Institute of Electronic Engineering | Zheng L.,Institute of Electronic Engineering
Lecture Notes in Electrical Engineering | Year: 2011

A method estimating signal-to-noise ratio (SNR) and carrier phase of the binary phase shift keying (BPSK) signal was proposed. First, the complex passband signal was converted to the complex baseband signal. Then baseband signal vectors were rotated step by step from 0 to 2π, and the maximum and minimal values of the power on the real axis were found so that the SNR value could be estimated. The rotated phase according to the maximum value was the estimation of the carrier phase. Simulation results show that the method can get satisfied estimation precision by using small number of symbols. © 2011 Springer-Verlag.


Wang J.,Institute of Electronic Engineering | Yin X.,Institute of Electronic Engineering | Lan H.,Institute of Electronic Engineering
Lecture Notes in Electrical Engineering | Year: 2011

Two improved carrier frequency estimating methods were proposed. The original method estimates carrier frequency directly using the phase of the autocorrelation of the signal, while the improved methods construct cost functions based on the autocorrelation, and estimate the carrier frequency through frequency searching, so that the frequency limitation in the original method is avoided. Otherwise, simulation results show that the estimating precision is also significantly improved because of not using phase directly. © 2011 Springer-Verlag.

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