2015 No. 02-Application of Electronic Technique

Review and Comment

Analysis on the competitiveness elements of electronic information industry chain

DOI：10.16157/j.issn.0258-7998.2015.02.001

Author：Liu Liehong，Chen Zhiya

Author Affilications：Central South University，Changsha 410083，China

Abstract：The competitive capacity of electronic information industry chain depends on the market value it created. Meanwhile the creative capacity of market value is determined by the profits and the corresponding costs from different industrial chains for customers which depend on six elements, including product attractiveness, business model, communication and learning, talent competitiveness, market value and government influence. Among the three models of electronic information industry chain, the six-element competitiveness presented the gradually increasing tendency from the whole industry chain to the platform industry chain and then to the alliance industry chain, that is to say, the six-element competitiveness of the whole industry chain is relatively weaker, the platform industry chain is stronger and the alliance industry chain is the strongest.

Key word：
electronic information industry chain competitiveness

whole industry chain competitiveness

platform industry chain competitiveness

alliance industry chain competitiveness

elements

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Research and analysis of the fifth generation mobile communication system

DOI：10.16157/j.issn.0258-7998.2015.02.002

Author：Yang Fengrui1，Dong Zhiming2

Author Affilications：1.Chongqing CYIT(group) Co.，LTD，Chongqing 400065，China； 2.Center of New Communication Technology and Research Application, University of Posts and Communications of Chongqing， Chongqing 400065，China

Abstract：This paper gives a detailed description of the basic characteristics of the fifth generation mobile communication(5G), analyzes the demand and development of 5G network architecture, and studies the possible key technologies in 5G according to the law of mobile communication technology development. Finally,it puts forward the research direction of 5G wireless’s network capacity and the key technologies.

Key word：
5G characteristics

core technology

network traffic

heterogeneous cooperative

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Research on cloud computing creditability

DOI：10.16157/j.issn.0258-7998.2015.02.003

Author：Jiang Rong1，2，Liao Hongzhi2，Yang Ming1，2

Author Affilications：1.School of Information, Yunnan University of Finance and Economics, Kunming 650221，China； 2.School of Software, Yunnan University, Kunming 650091，China

Abstract：This paper reviews current situation of cloud computing creditability and focuses on trustworthy platform, frame, model, mechanism, technology, management, evaluation, then acquires some conclusions：(1)many literature borrowed from traditional theory and method of trust management and dependable computing；(2)there are lack of study on evaluation of provider′s creditability；(3)measurement and evaluation of the trustworthy service is an important problem that urgently need to be overcame in cloud computing domain.

Key word：
cloud computing

creditability

trust

dependable computing

trustworthy service

measurement and evaluation

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Embedded Technology

Research and development of embedded systems based on Simics

DOI：10.16157/j.issn.0258-7998.2015.02.004

Author：Han Deqiang，Feng Yunhe，Wang Zongxia，Gao Xueyuan

Author Affilications：College of Computer, Beijing University of Technology，Beijing 100124，China

Abstract： This paper takes VxWorks 6.9 embedded operating system as an example to discuss the development methodology of embedded operating system′s bootrom, device drivers and applications, as well as the customization of embedded operating systems under Simics full system simulation environment. In this way, we explore and summarize the new approach of using Simics full system simulation environment to help developers to develop underlying software, middle-layer software and upper-layer software of embedded systems.

Key word：
full system simulation environment

Simics

VxWorks embedded operating system

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Design of high-rate visual stimulation controller based on FPGA

DOI：10.16157/j.issn.0258-7998.2015.02.005

Author：He Chaowen，Lin Lin，Yu Dekuang

Author Affilications：School of Biomedical Engineering，Southern Medical University，Guangzhou 510515，China

Abstract： In some visual evoked potential(VEPs) studies, such as steady-state VEP or VEPs with high-rate reversal patterns, the stimulator is required to be capable of manipulating the screen refresh rate precisely. The computer-based stimulator driving by software program is limited in generating high accuracy and up to screen refreshing rate level visual patterns because the time-delay nature of the processes under the operational system. This paper introduces a new design of stimulator scheme based on FPGA，which is able to directly control the VGA interface by the specific timing sequence signals. FPGA chip of EP4CE30 programmed by hardware description language Verilog HDL is used as controller and to generate image stimulus. The device is tested in cooperated with a high performance CRT monitor to generate up to 85 Hz reversal rate stimulation with high accuracy and synchronization.

Key word：
visual evoked potential

steady state response

high-rate

visual stimulation controller

FPGA

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Design of dual mode convertor based on Wi-Fi and Bluetooth

DOI：10.16157/j.issn.0258-7998.2015.02.006

Author：Yuan Weizhao，Gao Yuanyuan，Lv Qingwen

Author Affilications：School of Biomedical Engineering, Southern Medical University，Guangzhou 510515，China

Abstract： In order to receive capsule endoscopy images through Wi-Fi or Bluetooth，a kind of dual mode convertor based on CC3000 and BC41714 is researched and designed. Depending on the mode, convertor uses STM32F103 to control CC3000 or BC41714 to retransmit the capsule endoscopy images. Using the proposed convertor, images from capsule endoscopy can be directly displayed and saved on an Android phone. Images can also be directly uploaded to the workstation via Wi-Fi network. So the doctor can view the acquired images in real-time. Experimental results show that, the system can retransmit clear picture and complete the proposed function that it provides a feasible solution for remote diagnostics of capsule endoscopy.

Key word：
capsule endoscopy

image forwarding

Wi-Fi

CC3000

Bluetooth

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Design of microscope image acquisition system based on PCI Express

DOI：10.16157/j.issn.0258-7998.2015.02.007

Author：Wang Fubei，Wang Jiahua，Wu Qiongshui

Author Affilications：School of Electronic Information，Wuhan University，Wuhan 430072，China

Abstract：In order to realize real-time transmission of high-resolution images, the paper introduces the design of PCI Express image acquisition system in x4 channel. The system will be used in a large amount of data transmission of imaging module on Microscope.The system adopts a EP4CGX30CF23C8 FPGA of Altera company, and the chip integrates PCIE core which supports the function of chain DMA transmission. By using the Jungo company′s Windriver software, the paper has realized the design of the upper application of chain DMA. The system has been tested and verified that it can accomplish the acquisition of image data which comes from imaging module in real-time and transmitted rapidly and stably to upper monitor, with no frame dropping phenomenon and stable performance. This system is suitable for the data aquisition of the high-resolution and a large amount of data imaging module.

Key word：
PCI Express

chain DMA

image acquisition

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Internal defect detection device based on the acoustic excitation

DOI：10.16157/j.issn.0258-7998.2015.02.008

Author：Jin Long，Zhu Zhenchi，Liu Qianlin，Xu Zhaojian，Dong Xiaoxiao

Author Affilications：School of Electrical Engineering，Southeast University，Nanjing 210089，China

Abstract：An internal defect detection method is proposed. It excites the vibration to a detected object, at the same time receives the feedback of vibration, then makes a spectral analysis. By comparing the measured spectrum，we can confirm whether the object has an internal defect or damage. A simple model is designed and the effectiveness of this method is verified by simulation and experiment. Its application widely ranges in power, machinery, construction, manufacturing and other sectors with great potential.

Key word：
acoustic excitation

defect detection

spectrum

FFT

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Petrochemical factory worker health and safety warning system based on embedded technology

DOI：10.16157/j.issn.0258-7998.2015.02.009

Author：Zhang Feng，Li Kailiang，Zeng Junlin，Lu Zhiliang

Author Affilications：Guangdong University of Petrochemical Technology，Maoming 525000，China

Abstract： In view of the problem that it is likely to endanger the safety of the worker in the petrochemical production process, this paper designs a petrochemical factory worker healthy and safety warning system based on embedded technology，which consists of a helmet, wrist watch and monitoring center. The system monitors the surrounding environment and the employees′ sign parameters with intelligent wearable sensors, transmits signs, environmental parameters, video stream, etc. to wrist watch and monitoring center in real time with Wi-Fi wireless communications technology. The monitoring center can save and play videos and the environmental parameters, send the information to the watch display, then trigger the voice alarm on the helmet. Experimental results show that, the system can master the relationship between staffs′ health and their exposure to harmful factors promptly, effectively and dynamically, and provide escort for frontline staffs′ health and safety. It has very high market value to be popularized.

Key word：
petrochemical production

safety warning

environment parameter

video

wireless transmission

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Microelectronic Technology

Design and implementation of programmable clipper in heterogeneous SoC

DOI：10.16157/j.issn.0258-7998.2015.02.010

Author：Bai Chengshuang1，Jiang Lin1，Zhou Jianwei2

Author Affilications：1.College of Electronic Engineering，Xi′an University of Posts Telecommunications，Xi′an 710061，China； 2.College of Computer，Xi′an University of Posts Telecommunications，Xi′an 710061，China

Abstract： With the continuous improvement in graphics processing performance, the computation of graphics processing is also increasing day by day, and the traditional embedded system is facing challenges. One solution to this problem is to use a programmable device development for embedded system graphics processors to improve processing speed. Modern graphics processors use a variety of programmable shader processors. Although the speed and power performance of ASIC are better than that of programmable processor, its flexibility and reliability are unable to the programmable processor. In this paper, a micro-controller with a RISC architecture focuses on using assembly and programmable processor together to achieve the plane clipping function, instead of the function that the pure hardware implements. What′s more, the pipeline executes the multiple instruction multiple data stream(MIMD). Finally, it uses a large number of test points, lines and triangles in the FPGA development board to do the corresponding verifying.

Key word：
programmable

plane clipped

graphics processor

micro-controller

the pipelined

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Non-linearity modeling, simulation and design of interface circuit for a capacitive accelerometer sensor

DOI：10.16157/j.issn.0258-7998.2015.02.011

Author：Guo Hongzhuan

Author Affilications：College of Computer and Information Engineering，Nanyang Institute of Technology，Nanyang 473004，China

Abstract： Nonlinearity is one of the most critical parameters for Sigma-Delta(ΣΔ) accelerometer system. In this paper, the main nonlinear modules are analyzed based on a fifth-order ΣΔ accelerometer topology. The whole behavior model is accomplished in MATLAB, and the stability analysis is implemented by the application of the root locus. The switched-capacitor interface circuit and layout with 1-bit quantizer are designed in the TSMC 0.35 μm process. The post-simulation result of the layout accords with the behavior simulation result of the model, which indicates the accuracy of the model and designed circuit.

Key word：
nonlinearity

ΣΔ accelerometer

behavior model

stability

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Implementation of digital filter with optimal distributed arithmetic based on FPGA

DOI：10.16157/j.issn.0258-7998.2015.02.012

Author：Zhu Xiaoxiao，Cai Jun，Lu Wei

Author Affilications：School of Electrical and Information Engineering，Anhui University of Science and Technology，Huainan 232001，China

Abstract：Due to traditional MAC method used multiplier frequently in design of the digital filter，which led to decrease the speed of the whole system,while the general DA algorithm in the design of high order filter existed the problem of that the scale of look-up table was too large to achieve.This papper proposes an optimized DA algorithm to overcome this defect，to verify the algorithm the thesis design a 18 order linear phase structure of FIR low pass filter. Finally,this algorithm is brought out that is used Verilog HDL in FPGA,and simulated in Modelsim tool. The simulation outcome is contrasted with that the MATLAB calculated theoretical values，which verifies the correctness of optimization algorithm.

Key word：
MAC

optimization of DA algorithm

linear phase

FPGA

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The implementation of a reusable testbench based on SystemVerilog

DOI：10.16157/j.issn.0258-7998.2015.02.013

Author：Wang Peng1，Liu Wanhe2，Liu Rui2，Tian Yi1

Author Affilications：1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aircraft Airworthiness Certification Technology and Management Research Center, Civil Aviation University of China, Tianjin 300300，China； 2.Safety Science and Engineering College, Civil Aviation University of China, Tianjin 300300，China

Abstract： For small and medium-sized design, the traditional verification has low efficiency and poor reusability, while the advanced methodology-based verification is a bit complicated to build testbench, and the verification flow is not very flexible. The implementation of a reusable testbench is presented in this paper. The testbench is used to verify the IP core of ARINC429 transceiver, and it is implemented by employing the SystemVerilog language, designing the hierarchical structure, improving the architecture of project, and adopting key technology such as virtual interface and callback. With the assertions and coverage-driven verification technology, the functional verification is completed by running different testcases on this testbench, both code coverage and functional coverage are 100%. The practice shows that the testbench is reusable, easy to operate, and efficient.

Key word：
verification

SystemVerilog

testbench

reusable

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Measurement Control Technology and Instruments

Design of multi-channel real-time transmission system based on PCIe bus

DOI：10.16157/j.issn.0258-7998.2015.02.014

Author：Gao Jun1，Yang Canmei1，Du Xueliang2

Author Affilications：1.School of Information Science and Technology，University of Science and Technology of China，Hefei 230026，China； 2.Institute of Automation，Chinese Academy of Sciences，Beijing 100190，China

Abstract：Acorrding to the requirements of transmission and processing bandwidth of multi-channel image data, a multi-channel real-time transmission system based on PCIe bus which uses Virtex-6 FPGA is designed. The system includes a arbitration controling multiple devices to access DDR3, a high-speed transmission way to PC which uses PCIe Bus Master DMA mode. And the congestion problems exist in the full-duplex transmission are optimized. Experimental results show that the maximum transmission rate of this real-time transmission system can reach 1 632 MB/s of writing, 1 557 MB/s of reading in simplex mode and 1 478 MB/s of writing, 1 439 MB/s of reading in full duplex mode, which fully meets the needs of high-speed transmission and processing of multi-channel image data after acquisition with stable performance.

Key word：
PCIe

real-time transmission

arbitration

DMA

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Research on algorithm of speech compression and recovery based on adaptive compressed sensing

DOI：10.16157/j.issn.0258-7998.2015.02.016

Author：Mao Jing1，2，Yin Pengliang1，2，Ma Qi1，2，Zhang Binzhen1，2

Author Affilications：1．National Key Laboratory for Electronic Measurement Technology，North University of China，Taiyuan 030051；China； 2．Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education，North University of China， Taiyuan 030051，China

Abstract：According to the speech characteristics and traditional signal processing, this paper proposes that the adaptive algorithm is joined in compressed sensing, combined with redundant dictionary KSVD adaptive algorithm, adaptive observation matrix and SAMP reconstruction algorithm. By simulation analysis and comparison with the general compressed sensing on the average frame reconstruction SNR and relative error, it is ended to verify the superiority of adaptive compressed sensing algorithm.

Key word：
compressed sensing

speech signal

adaptive algorithm

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Application of an easy LZW algorithm for hardware implementation

DOI：10.16157/j.issn.0258-7998.2015.02.015

Author：Han Hui

Author Affilications：Shanxi Finance & Taxation College，Taiyuan 030024，China

Abstract： Test shows that the data redundancy of telemetry system transmission is up to 90%. This seriously reduces the performance of the telemetry system, but there is no uniform standard of lossless data compression set for telemetry data compression hardware system. In order to achieve the lossless compression of telemetry data for hardware system， an easy hardware implementation of LZW is achieved through increasing the allocated space of dictionary, optimizing the finding way of LZW, improving the dictionary update method of LZW algorithm. Finally, through software simulation and practical，test results shows that the ratio of telemetry data compression is more than 1.8:1，completing the target design.

Key word：
LZW

lossless compression

telemetry

data compression

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High speed multi-channel data acquisition system based on PCI data acquisition card

DOI：10.16157/j.issn.0258-7998.2015.02.017

Author：Ma Tao1，Zheng Xin2

Author Affilications：1.ZTE Intelligent IOT Technology Co.,Ltd，TianJin 300308，China； 2.ZTE Corporation，TianJin 300308，China

Abstract： According to the requests that data acquisition system should be high precision, high speed and multi-channel, presents a testing system using DAQ-2010 and CPLD. The principle of the system and the developing process of the system′s software are introduced. The data acquisition system acquires relatively excellent performance.

Key word：
data acquisition card

CPLD

Verilog HDL

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Design & implementation of a low cost health monitoring system

DOI：10.16157/j.issn.0258-7998.2015.02.018

Author：Dai Ming1，2，Wang Qi2，Wu Wanqing1，Chen Yili1，Li Chunyue1

Author Affilications：1.Shenzhen Institutes of Advanced Technology，Chinese Academy of Sciences，Shenzhen 518055，China； 2.Department of Information and Engineering，Nanchang Hangkong University，Nanchang 330063，China

Abstract： Based on the theory of modular design, a portable health monitoring system is designed and implemented which consists of physiological parameters acquisition circuits, micro-control circuit and system software. By virtue of this apparatus, the common vital signs can be collected, processed and displayed on a LCD. And compared with two commercial products, the results demonstrated that the system ran well and can stable，accurate measure body temperature, pulse, respiration, ECG, blood pressure and oxygen in real-time. In addition, the data can be wirelessly transmitted by Bluetooth 4.0 or WiFi.

Key word：
STM32

multi-parameter measurement

health monitoring

data parsing

real-time dynamic display

wireless communication

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The real-time monitoring system of river water quality

DOI：10.16157/j.issn.0258-7998.2015.02.019

Author：Zhang Xiuzai1，2，Chen Pengxin1，Zhang Guangyu1，Wu Huajuan1，Zhao Yibo1，2

Author Affilications：1.School of Electronic & Information Engineering，Nanjing University of Information Science & Technology，Nanjing 210044，China； 2.Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology(CICAEET)，Nanjing 210044，China

Abstract：The paper describes the design of a new river water quality real time detection system with high accuracy, which is based on MSP430F149 and wireless communication technology. The system can detect the temperature and pH value of a river in real time and send the value to monitoring department by wireless module. The system is powered by solar energy and a bipolar sensor coaxial interface is offered in order to replace pH sensor with another water quality sensor according to demand, so that the implementation of river water quality automatic monitoring is facilitated. The system can also be used for the quality monitoring of lakes, reservoirs and other water body with the additional functions of alarm, time-telling and temperature-telling, which all make the system have certain practical significance.

Key word：
water quality monitoring

temperature sensor

pH sensor

temperature compensation

wireless communication

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Design of indoor air environment monitor based on ZigBee

DOI：10.16157/j.issn.0258-7998.2015.02.020

Author：Zhu Hengjun，Zhang Yulong，Jin Zhan，Liu Wenli

Author Affilications：Communication and Electronics Engineering Institute，Qiqihar University，Qiqihar 161006，China

Abstract： An effective solution was designed to monitor the combustible gas leakage and the concentration of formaldehyde by using ZigBee wireless sensor network technology, adopting Z-Stack protocol to constitute monitoring network. The high-performance sensor attached on the endpoint could gather the real-time information of the levels of formaldehyde in indoor air and also detect whether the house have a gas leakage. When a safety hazards occurs, measures will be automatically taken, such as shut off valves or turn on the ventilator or alarm, to eliminate hidden dangers.

Key word：
ZigBee

Z-Stack

formaldehyde

natural gas

monitor

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The research of narrowband interference suppression on variable step size LMS algorithm

DOI：10.16157/j.issn.0258-7998.2015.02.021

Author：Wang Wenting，Ge Haibo，Wang Yanyan

Author Affilications：School of Electronic Engineering, Xi′an University of Posts and Telecommunications, Xi′an 710121，China

Abstract： In order to suppression the narrowband signal and reduce the interference of the DSSS, a new variable step size LMS adaptive algorithm is proposed for signal processing. According to the principle of adjusting step size, to adjust the step size μ(n) and error e(n) nonlinear relation. Combing with the hyperbolic secant function curve theory analysis shows that the algorithm acce- larates the convergence speed, improves the convergence precision, and reduces the error in steady state. In MATLAB building a DSSS, the analysis results indicate that the proposed algorithm outperforms the existing algorithms, can be more accurate in prediction and suppression of audio signal interference and enhances the anti-jamming performance of DSSS communication system.

Key word：
fixed step LMS

narrowband interference

direct sequence spread spectrum(DSSS)

hyperbolic secant

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Adaptive resource allocation algorithm based on channel aggregation in OFDM systems

DOI：10.16157/j.issn.0258-7998.2015.02.022

Author：Xu Siyun1，Feng Jinyuan1，Yang Chao2，Xiao Henghui2

Author Affilications：1.School of Science, South China University of Technology, Guangzhou 510640，China； 2.Guangdong Planning & Designing Institute of Telecommunications Co. Ltd.，Guangzhou 510630，China

Abstract： According to the adaptive resource allocation problem in multiuser OFDM system, a new adaptive resource allocation algorithm is proposed based on the channel aggregation and genetic algorithm. In the proposed algorithm, all subcarriers are grouped uniformly，the problem is transformed into a subcarrier group allocation problem. Genetic algorithm is used to solve the resource allocation problem, while the proportional fairness among the users is considered. Simulation results show that the performance of the new algorithm is better than the existing ones, the computational complexity and the computation time of optimal solution system are reduced, and the sum capacity of the system is maximized.

Key word：
OFDM

resource allocation

channel aggregation

genetic algorithm

rate maximization

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The combination of convolution channel coding and physical layer network

DOI：10.16157/j.issn.0258-7998.2015.02.024

Author：Yang Zhimin，Hu Yongjiang，Wang Changlong，Yuan Quansheng

Author Affilications：Department of Unmanned Aerial Vehicle Engineering，Ordance Engineering College，Shijiazhuang 050003，China

Abstract：The project of jointing the physical layer network coding and convolution coding is proposed in solving the problem of data transmission error rate where UAV(Unmanned Aerial Vehicle) as a relay platform in asynchronous communication conditions. In the scheme，the relay nodes use the algorithm of Belief Propagation(BP)，and joint the channel decoding and network coding together to resolve the impact of the communication system brought by symbol offset and phase offset. Simulation results show that the program’s bit error rate(BER) is lowest compared with no channel coding and RA code channel coding. The program improves the robustness of the system and resists the impact of the communication system effectively coused by the phase offset and symbol offset. As a result,it increases the drone noise immunity of UAV.

Key word：
phase shift

symbol offset

convolutional coding

physical layer network coding

belief propagation

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OFDM Channel estimation based on pseudo-noise sequence

DOI：10.16157/j.issn.0258-7998.2015.02.025

Author：Cui Jin，Shao Dingrong，Zhang Bo，Zhang Yanzhong

Author Affilications：School of Electronic and Information Engineering, Beihang University，Beijing 100191，China

Abstract： A model of orthogonal frequency division multiplexing(OFDM) system based on the pseudo- noise sequence is designed in this paper. Meanwhile, an iterative algorithm for channel estimation and a frequency domain equalization algorithm of low complexity are proposed to satisfy the equalization demand in channel estimation of this model. Then simulations are carried out corresponding to a Gauss white noise channel, a Rayleigh channel with a Doppler frequency shift and a double path delay channel. And the bit error rates(BER) are calculated respectively. Analysis results indicate that the method applies to usual channels and has a superior BER over traditional cyclic prefix OFDM(CP-OFDM). Moreover, its performance can be further improved though iteration. All findings mentioned above can be applied in OFDM digital television terrestrial broadcasting engineering.

Key word：
OFDM

channel estimation

pseudo-noise sequence

iteration

Doppler frequency-shift

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OFDM channel estimation algorithm based on improved Bayesian compressive sensing

DOI：10.16157/j.issn.0258-7998.2015.02.026

Author：Qiu Shangming，Li Dongrui，Luo Yonghua

Author Affilications：Department of Computer, Guangdong AIB Polytechnic College, Guangzhou 510507，China

Abstract： In order to obtain good channel estimation results of orthogonal frequency division multiplexing, and the traditional channel estimation methods did not make full use of the channel sparsity which leads to low precision estimation and low frequency spectrum utilization, a novel channel estimation algorithm of orthogonal frequency division multiplexing is proposed based on improved Bayesian compressive sensing. Firstly, the principle and steps of the proposed algorithm are introduced in detail, and then the simulation experiments are carried out in order to test the performance of the algorithm. The results show that compared with other channel estimation algorithm, the proposed algorithm can improve the channel estimation precision and has good performance but with less pilots.

Key word：
channel estimation

compressive sensing

improved Bayesian

orthogonal frequency division multiplexing

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Study on the fairness and resource allocation for OFDMA relay networks

DOI：10.16157/j.issn.0258-7998.2015.02.023

Author：Huang Jingran，Wang Fang，Yang Shouyi

Author Affilications：School of Information Engineering，Zhengzhou University, Zhengzhou 450001，China

Abstract： In this paper，in order to be fair to the allocation of resources, we propose a new resource allocation algorithm that allocates subcarriers according to the rate proportional of each user firstly, then adjusts the subcarriers according to the actual rate proportionally, and maximizes the system capacity at last in the decoding and forward OFDMA two relay and two users system. We put forward three schemes. Scheme one: By optimizing the Lagrangian dual function, we allocate subcarriers again according to the function, which can be viewed as the price for the power consumption. By doing so it can reduce the rate of loss of users when considering fairness. Scheme two and scheme three consider the subcarrier allocation from subcarrier and user holds respectively. They analyize the fairness problem from different aspects. Numerical results show that the proposed three schemes can improve the fairness of users.

Key word：
OFDMA

relay systems

fairness

resource allocation

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Joint component carrier selection and beamforming cell selection algorithm in heterogeneous network

DOI：10.16157/j.issn.0258-7998.2015.02.027

Author：Zheng Longlong，Sun Changyin,Liu Yu

Author Affilications：College of Communication and Information Engineering, Xi'an University of Posts and Telecommunications，Xi′an 710121，China

Abstract： The introduction of picocells aims to improve system capacity and the hotspot in heterogeneous networks, but the amout of user′s selection for picocells is small, the inter-layer interference is very complex, and the average throughput of the picocells edge user performance can not be improved. This paper proposed a joint component carrier selection and beamforming new cell selection algorithm. Compared with the reference algorithm, the simulation results show that this scheme can coordinate between macrocell and picocells interference, thereby increase the average throughput and cell edge user performance slightly, so that throughput of the entire system has been greatly improved.

Key word：
heterogeneous network

carrier aggregation

carrier selection

beamforming

cell selection

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Research and implementation of the CP2DR model in the detection phase on private cloud platform

DOI：10.16157/j.issn.0258-7998.2015.02.028

Author：Wu Jun，Zhang Yijun，Zhang Xiangli，Bai Guangwei

Author Affilications：College of Electronics and Information Engineering，Nanjing Technology University，Nanjing 211816，China

Abstract：For particular private cloud platform, this paper presents a dynamic security model CP2DR, CP2DR model mainly adopts virtual machine introspection technology(VMI) and virtual machine live migration technology to achieve private protection and response phase on cloud platform. The paper will focus on the detection phase, this phase uses Hidden Naive Bayes(HNB) classifier for testing. Experimental results show that, compared to other classifiers，HNB classifier CP2DR model used in the detection phase has more significant advantages, it also makes the whole CP2DR model better be used in the private cloud platform.

Key word：
cloud platform

dynamic security protection

CP2DR

Hidden Naive Bayes

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Task scheduling of cloud computing based on improved ant colony algorithm

DOI：10.16157/j.issn.0258-7998.2015.02.029

Author：Zhang Qiuming

Author Affilications：Center of Education Technology，Yulin Normal University，Yulin 537000，China

Abstract：Making full use of cloud resources to dispatch tasks efficiently is a key problem to ensure that the cloud computing system reliably runs. A task scheduling method based on improved ant colony optimization algorithm is proposed in this paper. The algorithm is optimized by pseudorandom proportion approach of ant system, to avoid the too fast convergence to local best solution. Meanwhile, the algorithm achieves the pheromone update by the combination of design thought of rank-based version of ant system(ASRank) and max-min ant system(MMAS), and solves the optimization problems effectively. The simulation results show that the algorithm is good in optimization ability, and improves resource utilization.

Key word：
cloud computing

ant colony algorithm

task scheduling

resource configuration

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Power acquisition research on DPA attack

DOI：10.16157/j.issn.0258-7998.2015.02.030

Author：Wang Feiyu，Liu Jianfeng

Author Affilications：CEC Huada Electronic Design Co.，Ltd.，Beijing 100102，Chin

Abstract： Aiming at that there are no methods concerning the acquisition parameter effect on DPA attack，this paper compares the effect on DPA attack in case of different sample frequency, resolution and low pass. The conclusions have been drew that it is better to use low pass and choose the sample frequency of 500 MHz or 1 GHz when attack sequential logic, then do not use low pass and choose 2.5 GHz or 5 GHz when attack combinational logic. Under this configuration, one can get a better result with DPA attack. Utilizing the conclusions above, we can enhance the efficiency of DPA attack even when the methods are same, and promote the research on DPA attack.

Key word：
differential power analysis

sample frequency

resolution

low pass

power acquisition

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Data transmission scheme based on value of information in underwater wireless sensor networks

DOI：10.16157/j.issn.0258-7998.2015.02.031

Author：Bai Ganghua，Li Wanghui

Author Affilications：School of Electronic Information Engineering, HEBI College of Vocation And Technology，Hebi 458030，China

Abstract： In underwater wireless sensor networks, the existing data transmission strategies don′t distinguish the importance of the value of information(VoI) collected for transmission, which reduces the significance of data collection. To solve this problem, this paper makes maximizing the value of information of the data delivered to the terrestrial station as the target. It proposes many scheduling strategies for the value of information of data chunks resulting from underwater observation to decide which data chunk to transmit and when, over the acoustic routes, which can maximum the value of information delivered to the user. Simulation studies on realistic scenarios show that scheduling algorithms that are able to locally estimate the value of information of a data chunk provide a significantly higher value of information of the delivered data. In contrast, uninformed algorithms, i.e., techniques that do not consider value of information at the node level, provide a marginal increase over using only the AUV for data collection.

Key word：
underwater wireless sensor networks

data transmission

value of information

scheduling algorithm

View(5588)

The design of SM2 modular inverse algorithm accelerator

DOI：10.16157/j.issn.0258-7998.2015.02.032

Author：Chang Jiang，Li Xianfeng

Author Affilications：CEC Huada Electronic Design Co.，Ltd，Beijing 100102，China

Abstract： Shangyong Mima 2(SM2) public key cryptography has been widely applied in the making of smart card. Modular inverse is an inevitable part of this technology. Due to the complexity degree of exponential, modular inverse is the most challenging barrier in improving the function of SM2 algorism. Utilizing the SM2 algorism public key engine as the basis, by applying the existing Montgomery structure, we successfully realize the design of a length-adjustable and high-speed modular inverse algorism. Additionally, by re-utilizing the existing modular multiplication resource, this design realizes the hardware configuration and data storage plan with more storage space spared but no increase in the cost of area. Compared to the traditional Fermat theory and Extended-Euclidean， this design is excelling in its computing speed. Compared to Montgomery algorism in the same category, the quality of its function is also excellent.

Key word：
modular inverse

SM2

Montgomery algorism

public key cryptography

smart card

View(8400)

An identity authentication model for cloud computing

DOI：10.16157/j.issn.0258-7998.2015.02.033

Author：Wang Qun1，2，Li Fujuan1，Qian Huanyan2

Author Affilications：1.Department of Computer Information and Cyber Security，Jiangsu Police Institute，Nanjing 210031，China； 2.School of Computer Science and Technology，Nanjing University of Science and Technology，Nanjing 210094，China

Abstract： Cloud computing is a groundbreaking applications on the basis of a number of technologies, which has become the focus of the current application and research. Among them, the authentication and authorization between cloud users and cloud services, and between different systems of cloud computing platform are a precondition for ensuring security of cloud computing. This paper briefly introduces information infrastructure on the basis of authentication and authorization for cloud computing, comprehensive analysis of the SAML2.0, OAuth2.0 and OpenID2.0 technical specifications and other features. On this basis, this paper presents an identity authentication model of cloud computing with open standard. This model provides a reference for the formation and management of cloud computing logical security domain.

Key word：
cloud computing

authentication

authorization

single sign on(SSO)

security domain

View(9426)

Power Supply Technology and Its Application

Research and implementation of the AC current source based on XMEGA

DOI：10.16157/j.issn.0258-7998.2015.02.034

Author：Yi Yi，Hao Jianwei，Li Changjun

Author Affilications：Institute of Information Technology，Guilin University of Electronic Technology，Guilin 541004，China

Abstract：As a kind of power equipment, AC current source is becoming widely used in the application of electronic systems. With the development of electronic technology, a higher request of parameters is put forward, such as the output range, precision and stability of the current. In order to achieve these requirements, a sinusoidal AC current source with ATxmega128A1 chip as micro controller is designed. With the closed-loop control function, it can automatically adjust the output current to provide stable output current value within the range of parameter settings, according to the variation of load. It has been applied to the plant seedlings magnetoelectric compound induction breeding control system. The operation results show that the system has practical advantages including high parameter precision, small waveform distortion, convenient control and adjustment. It is applicable to higher requirement of current stability and reliability, so it has very high application value and good market prospects.

Key word：
sinusoidal AC current source

XMEGA

constant current source

closed-loop control

View(9794)

One isolated constant current LED drive design free of using auxiliary winding

DOI：10.16157/j.issn.0258-7998.2015.02.035

Author：Han Zhigang，Xu Pengcheng

Author Affilications：Department of Electronic Science and Technology，Tongji University，Shanghai 201804，China

Abstract： One isolated constant current LED drive design but free of auxiliary wingding is proposed in this paper. Based on the flyback ampere-turns ratio conservation, a constant secondary peak current can be achieved. By the zero crossing detection circuit, a constant ratio between the secondary current time and switching period can also be achieved. In the role of filter and charge conservation, the output drive current is constant. This design solution is free of using auxiliary winding and decreases the cost and size.

Key word：
constant current

flyabck

auxiliary winding

zero crossing detection

View(7698)

Parameter design of inductance in DC-DC Boost converter with wide range input voltage

DOI：10.16157/j.issn.0258-7998.2015.02.036

Author：Chen Wenkui，Cheng Weibin，Guo Yingna

Author Affilications：School of Electronic Engineering，Xi′an Shiyou University，Xi′an 710065，China

Abstract： According to the working principle of the DC-DC Boost converter,calculation expression of the critical inductance parameter is given in current continuous mode.When the load and switch frequency are constant,the relationship between critical inductance and duty ratio is analyzed.The selection method of inductance is key research in current continuous mode with wide range input voltage.The verification result is consistent with the theoretical analysis by simulation analysis,which means the parameter selection of inductance is reasonable.

Key word：
DC-DC converter

Boost converter

current continuous mode

parameter design

View(16260)

Fault diagnosis of three-level inverter based on wavelet packet and SOM neural network

DOI：10.16157/j.issn.0258-7998.2015.02.037

Author：Pa Zilai，Fu ling，Lin Jikai

Author Affilications：College of Electrical Engineering，Xinjiang University，Urumqi 830047，China

Abstract： According to the open circuit fault of three level inverter, a fault diagnosis method-based on wavelet packet transform and self-organizing mapping(SOM) neural networks is adopted. The voltage of the up, middle and down bridge arm of the three level inverter are measured which for the classification of fault modes. Then the bridge arm voltage will extract the fault feature vector which will be the input of the SOM neural network after wavelet packet decomposition. So the fault pattern can be recognized. The simulation and experiment show that the diagnosis method is accurate and quick for the fault of the classification of the three level inverter and can reduce the difficulty of fault identification of maintenance personnel to improve the efficiency of diagnosis. It shows a wide application prospect for realizing the on-line fault diagnosis of three level inverter.

Key word：
three-level inverter

fault diagnosis

bridge voltage

wavelet packet

SOM neural network

View(7524)

Design of PFC AC/DC converter for battery chargers in electrical vehicle

DOI：10.16157/j.issn.0258-7998.2015.02.038

Author：Wang Yuanqing，Li Hongmei

Author Affilications：School of Electrical and Automation Engineering，Hefei University of Technology，Hefei 230009，China

Abstract： In order to reduce harmonic pollution on the grid and increase the power efficiency when charging electric vehicles connected to the grid, power factor must be corrected. PFC AC/DC converter is one of the core parts of the car charger, and provides a stable DC voltage for poster-level DC/DC system. Aiming at the battery charger of rated power 2 kW, the AC/DC converter is designed with power factor correction(PFC) capacity, the boost PFC main topology is selected and the average current control is used to carry out its control. The design process of main circuit and control circuit is shown in detail, including device selection, control strategy and parameters configuration of main circuit and control circuit. Finally, system simulation and prototype experiments are implemented to verify the dynamic and static performance of proposed PFC AC/DC converter.

Key word：
electric vehicles

on-board charger

AC/DC converter

Boost PFC

average current control

View(11822)

Modeling of power factor corrector in boundary conduction mode

DOI：10.16157/j.issn.0258-7998.2015.02.039

Author：Xie Shiyong，Su Chengyue，Pan Yongxiong，Lu Huihui

Author Affilications：School of Physics and Optoelectronic Engineering，Guangdong University of Technology，Guangzhuo 510000，China

Abstract：Modeling power-factor correction converters operation in a boundary conduction mode with state-space-averaging technique is suffered from determining the quiescent point in linearization, because duty ratio and the switching frequency of BCM converter vary with the input voltage. A novel modeling technology is presented for those converters. Firstly, constructing the relation among input voltage and output voltage, control loop output and the current of output diode, taking average in half the line voltage cycle to eliminate the input voltage and the diode current two variables affect, then getting a new average amount of constraint equations. Small-signal model can be derived by linear the new constraint equations. The performance of the proposed modeling approach is evaluated on a flyback 30 W. The experimental results and theoretical data prove that the model describes the dynamic characteristics of the circuit well.

Key word：
power factor correction

small-signal model

boundary conduction mode

View(6794)

Computer Technology and Its Applications

A hybrid ARIMA-LSSVM model for crime time series forecast

DOI：10.16157/j.issn.0258-7998.2015.02.040

Author：Tu Xiaomeng，Chen Qiangguo

Author Affilications：National Engineering Research Center for Multimedia Software, Computer School，Wuhan University，Wuhan 430072，China

Abstract：Forecasting the time series of crime can help public security department better grasp the criminal dynamic and has a great significance in realizing intelligent crime detection. Specific to the computing need of the prediction of crime time series, combining real crime dataset, a hybrid ARIMA-LSSVM model is put forward. This model utilizes ARIMA model predicting the linear component of series and PSO optimized LSSVM model predicting the nonlinear component to fully fitting the series, and computes the final result by using the hybrid algorithm. The great efficiency and accuracy are reached, which proves the validity of the model.

Key word：
crime time series

phase space reconstruction(PSR)

autoregressive integrated moving average(ARIMA)

back propagation neural network(BP)

PSO-LSSVM

View(11622)

Research of the forest fire identification method based on K-means and color model

DOI：10.16157/j.issn.0258-7998.2015.02.041

Author：Zhang Kaisheng，Zhang Mengmeng

Author Affilications：College of Electric & Information Engineering, Shannxi University of Science & Technology, Xi′an 710021，China

Abstract： In order to ensure the reliability and accuracy of detection results, from flame and smoke characteristics of the forest fires, the characteristics of the existing forest fire detection technology are analyzed. In order to solve these defects, a kind of forest fire recognition method based on clustering algorithm and color model is proposed. First, K-means algorithm is used to segment color images which were collected, according to the color characteristics of flame and smoke, the sub images of segmentation are preliminarily identified with an improved color model,then the characteristics of flame and smoke from the suspected sub images are inputted into RBF neural network to determine whether there is a fire. The simulation experiments show that the method can effectively identify on forest fire, providing powerful basis for subsequent fire fighting work.

Key word：
forest fire

flame

smoke

identification method

View(7308)

A new workflow system architecture and modeling platform

DOI：10.16157/j.issn.0258-7998.2015.02.043

Author：Hao Jun，Chang Qing，Zhang Gang，Wang Yaoli

Author Affilications：College of Information and Engineering，Taiyuan University of Technology, Taiyuan 030024，China

Abstract：The traditional approach to systems development based on the static model is difficult to solve the waste of resources caused by the rapid expansion and change of business rules and other issues. Workflow supports for the work of good content division and specific deployment. Combining with business process reengineering capabilities of SOA architecture, this paper puts forward a new development framework with three-tier model as the core to support fast, smooth and reusable application, completes the detailed description and design of process modeling platform and the engine, completes construction work of modeling platform, and realizes modeling with banking card as an example and based on the three-tier model. The results show that the system development framework has good ability BPR, ensures sustainable and stable of business systems, and improves the level production and work efficiency of organization.

Key word：
three-tier model

application system architecture

modeling platform

SOA

workflow

View(7418)

基于MXT9030的微电容加速度计系统搭建

DOI：10.16157/j.issn.0258-7998.2015.02.044

2015 No. 02

Publish Date：2015-02-06

ISSN：0258-7998

CN：11-2305/TN

Review and Comment

Key word： electronic information industry chain competitiveness whole industry chain competitiveness platform industry chain competitiveness alliance industry chain competitiveness elements View(5098)

Key word： 5G characteristics core technology network traffic heterogeneous cooperative View(16142)

Key word： cloud computing creditability trust dependable computing trustworthy service measurement and evaluation View(7948)

Embedded Technology

Key word： full system simulation environment Simics VxWorks embedded operating system View(9228)

Key word： visual evoked potential steady state response high-rate visual stimulation controller FPGA View(6398)

Key word： capsule endoscopy image forwarding Wi-Fi CC3000 Bluetooth View(5952)

Key word： PCI Express chain DMA image acquisition View(13420)

Key word： acoustic excitation defect detection spectrum FFT View(4916)

Key word： petrochemical production safety warning environment parameter video wireless transmission View(9056)

Microelectronic Technology

Key word： programmable plane clipped graphics processor micro-controller the pipelined View(5432)

Key word： nonlinearity ΣΔ accelerometer behavior model stability View(6614)

Key word： MAC optimization of DA algorithm linear phase FPGA View(7090)

Key word： verification SystemVerilog testbench reusable View(13060)

Measurement Control Technology and Instruments

Key word： PCIe real-time transmission arbitration DMA View(9424)

Key word： compressed sensing speech signal adaptive algorithm View(8924)

Key word： LZW lossless compression telemetry data compression View(7808)

Key word： data acquisition card CPLD Verilog HDL View(18538)

Key word： STM32 multi-parameter measurement health monitoring data parsing real-time dynamic display wireless communication View(8462)

Key word： water quality monitoring temperature sensor pH sensor temperature compensation wireless communication View(10104)

Key word： ZigBee Z-Stack formaldehyde natural gas monitor View(17564)

Key word： fixed step LMS narrowband interference direct sequence spread spectrum(DSSS) hyperbolic secant View(8306)

Key word： OFDM resource allocation channel aggregation genetic algorithm rate maximization View(9064)

Key word： phase shift symbol offset convolutional coding physical layer network coding belief propagation View(7722)

Key word： OFDM channel estimation pseudo-noise sequence iteration Doppler frequency-shift View(7594)

Key word： channel estimation compressive sensing improved Bayesian orthogonal frequency division multiplexing View(7418)

Key word： OFDMA relay systems fairness resource allocation View(4892)

Key word： heterogeneous network carrier aggregation carrier selection beamforming cell selection View(5110)

Key word： cloud platform dynamic security protection CP2DR Hidden Naive Bayes View(3600)

Key word： cloud computing ant colony algorithm task scheduling resource configuration View(7942)

Key word： differential power analysis sample frequency resolution low pass power acquisition View(8312)

Key word： underwater wireless sensor networks data transmission value of information scheduling algorithm View(5588)

Key word： modular inverse SM2 Montgomery algorism public key cryptography smart card View(8400)

Key word： cloud computing authentication authorization single sign on(SSO) security domain View(9426)