2015 No. 05-Application of Electronic Technique

Review and Comment

Design techniques for low-voltage low-power phase-locked loops

DOI：10.16157/j.issn.0258-7998.2015.05.001

Author：Xu Wei1，Huang Letian2，Ding Zhaoming2，Li Qiang2

Author Affilications：1．Shanghai Huahong Grace Semiconductor Manufacturing Co.Ltd.，Shanghai 201203，China； 2.School of Microelectronics and Solid-State Electronics，University of Electronic Science and Technology of China， Chengdu 610054，China

Abstract： Phase-Locked Loop(PLL) is one of the most important modules in communication systems. The characteristic of the PLL affects the performance of the whole system. With the increasing requirement of low-voltage and low-power, research on low-voltage and low-power PLL becomes famous. This work sums some of the recent outstanding methods and techniques in low-voltage and low-power PLL. Some difficult issues must be solved when someone wants to design a low-voltage and low-power PLL, such as the mismatch current of charge pump, voltage-controlled oscillator and fast-speed divider, which are much more difficult under the strict of low voltage and low power.

Key word：
low-voltage

low-power

PLL

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Embedded Technology

Design of embedded PTZ control system based on FreeRTOS

DOI：10.16157/j.issn.0258-7998.2015.05.002

Author：Zhu Yaolin，Fan Pei

Author Affilications：School of Electronics and Information，Xi′an Polytechnic University，Xi′an 710048，China

Abstract：Due to rapid development of video monitoring technology，the real-time positioning of PTZ control system has become the problem need to be solved，this paper chooses high-performance microprocessors and real-time operating system，which can improve the performance of the system，and solves the problem of real-time and intercommunity. PTZ control system is designed based on FreeRTOS，the STM32 is chosen as the master controller of PTZ decoder board，by parsing PTZ control command drive stepper motor rotation, FreeRTOS applications are divided into a number of different tasks, in order to optimize the allocation of the CPU time and the system resource. The debugging results show that system realizes real-time all-round precise positioning and automatic identification of PELCO-D, PELCO-P and SAMSUNG communications protocols.

Key word：
real-time operating system

STM32

FreeRTOS

porting

PTZ control

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The design of automatic scoring system based on laser

DOI：10.16157/j.issn.0258-7998.2015.05.004

Author：Chen Guangqing，Sun Jian，Wang Jidai，Xu Xiqing，Zhang Liang

Author Affilications：College of Mechanical and Electronic Engineering，Shandong University of Science and Technology，Qingdao 266590，China

Abstract：The system aims at realizing high precision automatic target reporting in the field and making a long-range, real-time and intuitive display of the results. The portability，safety and reliability of the system have also been taken into consideration. Laser positioning is used and its principle is introduced in detail together with system design of automatic scoring system. The advantages and disadvantages of this system are introduced contrast with the other systems. High precision automatic scoring is realized with an error within 2 mm，long-range and intuitive display of the results have come true. Data query is allowed in the system, the system has advantages in reliability，adaptability，accuracy，price，etc. The system is safe and reliable，light and portable with strong adaptability，and its good application prospect is expected.

Key word：
indication of shots

laser positioning

high precision

automatic

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Auto gain compensation design on car audio system

DOI：10.16157/j.issn.0258-7998.2015.05.005

Author：Zhu Zengbao，Liu Peilin

Author Affilications：School of Electronic Information and Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200030，China

Abstract：Aiming at traditional car audio system does not adapt to the changing in-car audio environment automatically, this paper designs an automatic gain compensation based on DSP technology. First, it tests and analyzes the current multimedia volume and interior noise which are key factors to impact car audio effect. Then it adjusts the gain and filter parameters of car audio systems automatically, especially dynamic compensate volume and loudness, aim to ensure high quality enjoyment in constantly changing environment finally. Real vehicle tests show that this design reduces the interior car noise effectively，and meets the car audio characteristics of frequency response.

Key word：
car audio system

auto gain compensation

volume compensation

loudness compensation

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The wireless air quality monitor system based on embedded Web server

DOI：10.16157/j.issn.0258-7998.2015.05.006

Author：Zheng Xi1,2，Zhou Jinzhi1,2，Kang Chunxiang1,2

Author Affilications：1.School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China； 2.Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Mianyang 621010, China

Abstract：This paper puts forward a remote environment motoring system, which uses wired and wireless communication technology, and is constructed by several detecting nodes for collecting environment parameters and a monitoring terminal for achieving connection with Internet. The monitoring terminal realizes the functions of data analyzing and Web server. The detecting nodes gather carbon monoxide, VOC, smoke and flammable gas′ destiny, then process these data, display in LCD, and send it through wireless communication module. The testing shows that the monitoring terminal in the room environment with obstacles can achieve accuracy within 20 m data receiving, which is sent by detecting nodes. The functional realization of Web server allows remote access through PC browser browsing Web pages to get the server IP address parameters in a monitored environment.

Key word：
MSP430

CS8900A

CC1100

embedded Web service

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Design and implementation of the LFMCW radar middleware based on DM3730

DOI：10.16157/j.issn.0258-7998.2015.05.007

Author：Tang Guozhen，Zhang Shizong，Pei Xu

Author Affilications：Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China

Abstract： This paper designs and implements a middleware software, to shield the different of interface between radar scanning unit based on multicast mechanism and display unit based on unicast mechanism, and by using the cooperation mechanism of ARM and DSP dual-core in DM3730, puts the implement of radar coordinate conversion algorithm processing to DSP core to solve the problem that single-core ARM processor performance does not meet the requirements of data processing speed(packet loss) . Tests show that after joining the middleware, it can not only guarantee normal communication between radar scanning unit and the display unit, improve portability of the display unit, but also optimize the display performance of the system to meet the performance requirements of embedded systems.

Key word：
multicast

unicast

middleware

DM3730

embedded

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A real-time compression system for remote sensing image based on multi-DSP

DOI：10.16157/j.issn.0258-7998.2015.05.008

Author：He Wenjing，Hu Jian，Li Ziyang，Meng Fanrong，Zhou Chuncheng

Author Affilications：Laboratory of Quantitative Remote Sensing Information Technology, Academy of Opto-Electronics， Chinese Academy of Sciences, Beijing 100094，China

Abstract：The demand for real-time compression of high-resolution remote sensing image is becoming urgent, with the develop- ment of remote sensing technology. A multi-DSP parallel processing system for real-time image compression is designed. The system is composed of eight DSPs and two FPGAs, providing 28.8 GFLOPS operations performance. PCI-Express bus is used as external interface, providing the powerful capability of communication and expansion. To archive the high performance in data transmission，processing and large capacity storage, the loose coupled parallel architecture is used, with processors interconnected by Link Port. An application example of JPEG2000 compression based on this system is given. It is shown that the throughout speed of the system can achieve 6.2 Mpixels/s with lossless compression. Therefore, it is suitable for the compressing application of high-resolution remote sensing image.

Key word：
multi-DSP

FPGA

image compression

JPEG2000

parallel process

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AVS 3D real-time decoder design and implementation based on FPGA/SoC platform

DOI：10.16157/j.issn.0258-7998.2015.05.003

Author：Ren Pengfei，Yu Hongyang

Author Affilications：Research Institute of Electronic Science and Technology，University of Electronic Science and Technology of China， Chengdu 611731，China

Abstract： AVS(audio video coding standard)group formulates stereo-packing scheme aimed at 3D video. Based on stereo-packing algorithm, using FPGA hardware acceleration module to parse the stereo-packing ES stream syntax element and cooperating with the Xilinx ZYNQ 7020 SoC development board, this paper innovatively completes the AVS 3D decoder on FPGA/SoC co-platform. Using HDMI port to export the decoded data to the 3D display device, it gets the 3D video with depth information and verifies the validity of AVS 3D real-time decoder.

Key word：
3D video

stereo-packing algorithm

decoder design

FPGA/SoC co-platform

View(9156)

Microelectronic Technology

Design of block cipher algorithm against power analysis and fault attack

DOI：10.16157/j.issn.0258-7998.2015.05.009

Author：Zhang Haifeng，Yu Yanyan

Author Affilications：Beijing NARI SmartChip Microelectronics Company Limited，Beijing 100192，China

Abstract： An effective countermeasure against differential power analysis and fault attack is presented in this paper. The pipeline method adds the noise during the normal encryption or decryption, the same input enters into the pipeline of different depth, compare the results to decide whether there is fault injected during the encryption or decryption. According the simulation, the method is effective.

Key word：
differential power analysis

fault attack

pipeline

countermeasure

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Design of a high performance controller for power amplifier

DOI：10.16157/j.issn.0258-7998.2015.05.010

Author：Liu Chifeng1，Zheng Yaohua1，Liu Bin2，Zhang Guohao1

Author Affilications：1.School of Information Engineering，Guangdong University of Technology，Guangzhou 510006，China； 2.Guangzhou Junheng Micro-electronics Tech Ltd.，Guangzhou 510006，China

Abstract：The CMOS controller is a crucial part of Radio Frequency(RF) Power Amplifier Module (PAM)，it provides stable bias and simple logic control for RF Power Amplifier(PA). We present a high performance PA controller for WCDMA handset PAM, adopting the structure of multiplexing error amplifier(EA) and compensated capacitor. The circuit is fabricated in a 0.25 μm standard CMOS process provided by TSMC and has the die size of 840 μm×440 μm. The mode switch time is less than 1.5 μs and the PSRR at 1 GHz is less than -10 dB. The measured results show that the mean value, standard deviation and temperature coefficient of output voltage is 2.894 V，17 mV and -370 ppm/℃ respectively，the yield is 94%.

Key word：
controller

power amplifier module

WCDMA

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Design of wireless sensor network MAC layer communication chip

DOI：10.16157/j.issn.0258-7998.2015.05.011

Author：Bai Yunfu，Xie Yandong，Fu Xinghua

Author Affilications：College of Big Data and Information Engineering, Guizhou University, Guiyang 550025，China

Abstract： This paper puts forward a ASIC design scheme of MAC layer communication chip, designs a MAC chip including a CSMA-CA algorithm controller embedded in a MAC transceiver chip module based on the competitive IEEE 802.15.4 MAC protocol and a 8 bit RISC CPU, on which the MAC transceiver chip module can exchange date with the RISC CPU. Based on the ASIC flow, this paper completes the chip design of architecture, RTL coding, verification, synthesis and physical design, and also generate the final chip layout by Encounter software.

Key word：
wireless sensor network

MAC

ASIC

IEEE 802.15.4

CSMA-CA

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Design of a high-efficiency 2.45 GHz rectifier for low-input-power energy harvesting

DOI：10.16157/j.issn.0258-7998.2015.05.012

Author：Zhang Quanqi1，2，Deng Huachao1，2，Tan Hongzhou1，2

Author Affilications：1.School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006，China； 2.SYSU-CMU Shunde International Joint Research Institute，Shunde 528300，China

Abstract：This paper presents a high-efficiency 2.45 GHz rectifying circuit with microstrip line for harvesting low input RF power effectively. The rectifying circuit which mainly composed of voltage double diode BAT15-04W, open stub matching circuit and harmonic suppression circuit. The voltage double diode BAT15-04W is a low-cost surface mounted Schottky diode which is suitable for low power harvesting. The open stub matching circuit is used to match the rectifier to 50. The harmonic suppression circuit is designed for conversion efficiency optimization. The measured results of rectifying circuit found that the RF-to-DC conversion efficiency can reach 75.3% and the DC power is higher than 3.45 V for 5 dBm input power at 5 k DC load.

Key word：
rectifier

low input RF power

high efficiency

harmonic suppression

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Design of a 2.5 GHz high linearity Watt-level CMOS power amplifier

DOI：10.16157/j.issn.0258-7998.2015.05.013

Author：Xu Yuanzhong，Mei Fei

Author Affilications：Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068，China

Abstract：A 2.5 GHz PA consisting of two-stage fully differential amplifiers is presented in this paper. The saturated output power reaches to 31.8 dBm, by combining the output voltages of two sub-amplifiers with the same configuration, which is included in the second stage amplifier. In order to improve the linearity of the PA, on-chip the second harmonic termination is proposed in the second stage to suppress the third harmonic distortion. Finally, the PA is designed and simulated in Agilent’s ADS using TSMC 0.18 μm CMOS spice model. According to the simulation results, S11 is less than -25 dB, S21 is 25 dB, power gain is 19.4 dB, the saturated output power is 31.8 dBm, the maximum PAE is 32.9%, and IMD3 is -30 dBc at 22.3 dBm output power.

Key word：
CMOS

power amplifier

the third-order intermodulation distortion

capacitance compensation

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Measurement Control Technology and Instruments

The design of transformer magnetic bias wireless alarm system based on the sound judgment

DOI：10.16157/j.issn.0258-7998.2015.05.014

Author：Zhu Jianwei，Jiang Xidan

Author Affilications：Tianshengqiao Hydropower General Plant，China Southern Power Grid Frequency and Amplitude Modulation Power Company， Xingyi 562400，China

Abstract： Power transformer D.C. magnetic biasing could contribute to noise increase and iron core overheating, etc., which is in disfavor of the safe operation of transformer and power grid. The top priority to settle the detriment on transformer ontology and electric power system operation thrown by D.C. magnetic biasing is to detect out D.C. magnetic biasing of transformer quickly and exactly. To measure D.C. bias magnetic device, the way of measuring the neutral point current which is highly-priced and completely-structured needs to further improve its optimization. To work out wireless alarm device monitoring transformer D.C bias, sound acquisition module, Siemens TC35 module and S7-200 PLC are employed in this paper, accompanied by the adoption of the marked feature — running voice in the transformer D.C bias. It is suggested by the experiment and effects in use that this device is featured by alarming accurately and installing conveniently, etc.

Key word：
D C bias

sound discriminant

wireless alarm

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Research of IVF oocyte retrieval device system based on Arduino

DOI：10.16157/j.issn.0258-7998.2015.05.015

Author：Chen Xiangjun1，Huang Sunan2，Xiao Mingbo1

Author Affilications：1.School of Communication Engineering，Hangzhou Dianzi University，Hangzhou 310018，China； 2.College of Life Information Science & Instrument Engineering，Hangzhou Dianzi University，Hangzhou 310018，China

Abstract： In the assisted reproduction system, oocyte retrieval device is a key equipment. Considering current oocyte retrieval device mainly depends on imports, which is expensive and prone to failure, the research develops an oocyte retrieval device system based on Arduino for IVF. The design of the main control system, oocyte retrieval vacuum control system and thermostatic test tube rack are described, and the system control strategy based on PID algorithm and the performance of the test system are presented. The experimental results show that the device is highly reliable, convenient to control and cheap to produce, demonstrating further development space and market prospects.

Key word：
Arduino

oocyte retrieval vacuum device

thermostatic test tube rack

PID control algorithm

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A novel electrical impedance tomography system design for lung functional based on FPGA

DOI：10.16157/j.issn.0258-7998.2015.05.016

Author：Chen Xiaoyan，Yang Yongzheng

Author Affilications：College of Information and Automation，Tianjin University of Science and Technology，Tianjin 300222，China

Abstract： An electrical impedance tomography(EIT) system with 16 electrodes for research into lung ventilation process is introduced in this paper, and the software and hardware design, performance testing of the system and the imaging experiments based on CGLS algorithm. The dynamic imaging experiments of organic glass rod are carried out in an experimental tank filled with saline and the images indicate that this system can accurately recognise the dynamic target. Furthermore, data collection are carried out during the process of breathing on a volunteer and conduct a contrast test on chest model influence on imaging quality in the reconstruction image of the lung ventilation. Eventually, a clear lung respiratory process image are obtained, and consequently lay a firm foundation for the further study on evaluation of pulmonary function and bedside respiratory monitoring requirements, etc.

Key word：
electrical impedance tomography

lung ventilation imaging

real-time imaging

CGLS algorithm

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Improved wavelet threshold algorithm application in motor vibration signal denoising

DOI：10.16157/j.issn.0258-7998.2015.05.017

Author：Wang Lidong1，Zhang Kai1，Wang Liangrun2

Author Affilications：1.School of Electronic and Information Engineering，University of Science and Technology Liaoning，Anshan 114051，China； 2.USTL National University Science and Technology Park，Anshan 114051，China

Abstract： According to the problem of noise interference in the motor vibration signal acquisition, a novel motor vibration signal denoising method of wavelet shrinkage threshold based on Bayesian estimation was proposed. The vibration signal denoising characteristics of different scales are considered in proposed method. The new threshold is suitable for the situation of noise distribution. Noise reduction can be gotten by improving the threshold function. The improved threshold function makes up for deficiencies of each threshold functions better. The continuity of the proposed threshold function and the flexibility of threshold adjustment can be guaranteed. Meanwhile, the proposed threshold function solves the problem of deviation of inherent threshold function, and the useful information of noisy signal can be protected.

Key word：
denoising

threshold

vibration

motor

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The design of selfadaptive cable matching system for multicore cable testing based on STM32F103

DOI：10.16157/j.issn.0258-7998.2015.05.018

Author：Li Hansheng1，Huang Nan2，Wang Junjun1

Author Affilications：1.Faculty of Mechanical and Electrical Engineering, Hubei Three Gorges Polytechnic, Yichang 443000，China； 2.Yichang Branch, State Grid (Hubei) Company, Yichang 443000，China

Abstract：This paper presented a new self-adaptive multi-core cable matching method based on MCU technology, to improve the current traditional inefficient cable matching method. The proposed system hardware has two units, the master and slave, which both include micro-control unit(MCU), human-machine interface(HMI) and cable matching circuit. The built-in software are capable to perform cable matching signal transmission by master unit, and cable matching signal reception and analysis by slave unit. The prototype test of proposed system shows this system has advantages to improve the multi-core cable matching process, where the process time, operation conveniency, ease of use, cable matching accuracy are intensively improved. It meet the industrial requirements, and is capable to be applied into electrical equipment installation applications.

Key word：
cable matching

self-adaption

multi-core cable

STM32F103

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Study on GPS/INS integrated navigation filtering algorithm asststed by neural network

DOI：10.16157/j.issn.0258-7998.2015.05.019

Author：Chen Xinxin，Zhang Fuchun，Hao Yanzhong

Author Affilications：Department of Aviation Theory，Aviation University of Air Force，Changchun 130022，China

Abstract：In the conditions of high attitude and high speed， conventional Kalman filtering of GPS/INS integrated navigation systems is divergent because of the GPS outages. It leads to the accuracy of navigation system a serious decline. In order to solve the problem， an algorithm of BP neural network aided Kalman filtering information fusion is proposed. The BP is trained while GPS signals are available and output is predicted during the GPS outages. In the thesis， we take the parallel structure of multi neural network to reduce cross-coupling and improve the training speed. The test results indicate that the proposed methods can efficiently compensate for GPS updates during short outages. The simulation results show the effectiveness of the method.

Key word：
Kalman filtering

integrated navigation systems

GPS/INS

BP neural network

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Study on remote sensing images of de-blurring based on sparse representation

DOI：10.16157/j.issn.0258-7998.2015.05.020

Author：Zhao Xiangyu2，Qin Zhentao1，2，Yang Wunian1，Yang Ru2

Author Affilications：1.Key Laboratory of Geo-special Information Technology, Ministry of Land and Resources/Institute of Remote Sensing & GIS， Chengdu University of Technology，Chengdu 610059，China； 2.Panzhihua College，Panzhihua 617000，China

Abstract：De-Blurring the high resolution remote sensing images is an important issue in the relative research field of remote sensing. In this paper a novel algorithm of de-blurring the high resolution remote sensing images is proposed based on sparse representation. The high spatial resolution remote sensing images can be de-blurred by gradient projection algorithm, and keep the useful information of the image. The experimental results of the remote sensing images obtained by “the first satellite of high resolution” show that the algorithm can de-blurred the image more effectively and improve the PSNR, this method has better performance than other dictionary learning algorithm.

Key word：
sparse representation

image de-blurring

gradient projection algorithm

the first satellite of high resolution

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A high quality optimization texture sampling filter method

DOI：10.16157/j.issn.0258-7998.2015.05.026

Author：Liu Xiaofang1，Li Jingli2

Author Affilications：1.College of Electrical and Information Engineering，Henan University of Urban Construction，Pingdingshan 467036，China； 2.Automation Engineering Department，Yellow River Conservancy Technical Institute，Kaifeng 475003，China

Abstract： A method by combining texture from a specified number of Mipmap in several resolutions to create high-quality sampling filter is presented in this paper. This method can control the number of reads per sample texture, so as to expand the quality to match the GPU memory. To find the best texture collection to represent a given sampling filter, using cardinality constrained least squares optimization method and storing the results to optimize encoding a table it′s easier to store on the GPU. The results show a few can accurately read the texture reconstruction filter, when four or more per sample texture, and this method can produce better image quality than tri-linear interpolation.

Key word：
texture

filter

cardinality constrain

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An improved timing synchronization method for MIMO-OFDM systems

DOI：10.16157/j.issn.0258-7998.2015.05.027

Author：Nie Wei，Yan Han

Author Affilications：Computer System and Communication Laboratory，Beijing University of Chemical Technology，Beijing 100029，China

Abstract：An improved timing synchronization method for MIMO-OFDM system based on CAZAC sequence is presented in this paper. This method can get the exact timing location directly, not affected by the frequency synchronization performance. What′s more, it can reduce the complexity of synchronization since it can estimate the Integer-Frequency-Offset when it works. Through simulation, performance of this method is verified.

Key word：
MIMO-OFDM system

CAZAC sequence

timing synchronization

Integer-Frequency-Offset

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The close yagi antenna design for direct communication between the trains

DOI：10.16157/j.issn.0258-7998.2015.05.021

Author：Zhou Huaiqing，Li Maoqing，Lin Junting，Han Lankui

Author Affilications：Automation and Electrical Engineering College，Lanzhou Jiaotong Uniwersity，Lanzhou 730070，China

Abstract： The paper is to design a high gain close Yagi antenna whose center frequency is 150 MHz for the train to train direct communication system. It puts forward and designs a antenna improved form of the traditional Yagi antenna-Full Fold Dipole Closely Spaced Yagi Antenna for it combined with the characteristics of direct communication system between trains by application of Yagi antenna theory, the close distance principle and the folded dipole theory. And it is optimized with genetic algorithm. Finally, we use HFSS simulating and get a closely spaced Yagi antenna whose size is reduced obviously and electrical performance indexes meet the design requirements.

Key word：
direct communication between the trains

close yagi antenna

full fold dipole

genetic algorithm

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Research of optimization algorithm for hopping OFDM low voltage power network

DOI：10.16157/j.issn.0258-7998.2015.05.022

Author：Wang Yan1，2，Wang Chao1，Liu Hongli2

Author Affilications：1.School of Electrical Engineering，University of South China，Hengyang 421001，China； 2.College of Electrical and Information Engineering，Hunan University，Changsha 410082，China

Abstract：This paper propose a novel algorithm for optimizing the performance of frequency hopping OFDM communication network. By taking the location and special distribution of the transmission nodes into consideration, it analyzes the closed-form solution of the transmission interrupt probability of the physical interference channel. Furthermore, it use the closed-form solution to characterize the transmission capability of the frequency hopping low voltage power line carrier communication network. In order to optimize the transmission performance, it takes the interrupt probability as the system objective function, and integrates the exhaustive search and the gradient search strategies to optimize the number of the frequency hopping channels, the OFDM modulation index and the error control coding rate, which aims at finding out their optimal combination.

Key word：
power line carrier communication

frequency hopping

OFDM

gradient search

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A novel self-organized network based on virtual multiple-channel structure

DOI：10.16157/j.issn.0258-7998.2015.05.024

Author：Zhao Ying

Author Affilications：Qinghai Radio & Television University，Xining 810008，China

Abstract：To improve code resource utilization efficiency in disaster cure network, a virtual multiple-channel networking scheme was proposed based on multi-channel technique. This scheme employed virtual multiple-channel structure with single control channel and multiple data channels, and designed a special frequency hopping generator to make transceiver switch to different FH sequences. Control channel employed the FH sequence its own subnet occupies, and data channel used unused FH sequences. For this networking scheme, this paper proposed a virtual multiple-channel routing protocol VMCRP, which consists of a new routing metric VMCM and a control-channel split-phase broadcast mechanism CCSP. The simulation results show that compared with traditional self-organized network, the proposed network can improve the network capacity and throughput significantly.

Key word：
synchronous orthogonal network

routing metric

multi-channel

network throughput

broadcast mechanism

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Research of PUCCH downlink HARQ feedback method in TD-LTE-Advanced system

DOI：10.16157/j.issn.0258-7998.2015.05.023

Author：Li Xiaowen，Feng Youbo，Sun Peng，Zhou Yao

Author Affilications：School of Communication ＆ Information Engineering，Chongqing University of Posts ＆ Telecommunications，Chongqing 400065，China

Abstract：This paper proposes a decreasing TDD(time division duplex) carrier aggregation system downlink Hybrid Automatic Repeat Request(HARQ) feedback delay method. By comparing the current members of the carrier and the main serving cell downlink HARQ round trip delay，eNB decides whether to allocate resources to the new member PUCCH carrier. The analysis shows that,using this method,the TDD carrier aggregation system downlink HARQ feedback delay decreases obviously.

Key word：
carrier aggregation

uplink control channel

hybrid automatic repeat request

low delay

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Adaptive cooperative spectrum sensing algorithm based on credibility and SNR

DOI：10.16157/j.issn.0258-7998.2015.05.026

Author：Zhou Rui，Wen Hong，Zhou Heng

Author Affilications：School of Computer and Communication，Hunan University of Technology，Zhuzhou 412007，China

Abstract： To improve cognitive radio spectrum sensing performance, this paper proposes an adaptive cooperative spectrum sensing algorithm based on credibility and SNR. This scheme uses the estimative value of SNR to obtain CR users′ initial credibility, and then uses the adaptive parameter adjustment strategy to achieve the optimal state. In addition, the algorithm can meet the requirements of the time-varying channel by using the periodic initialization strategy. Simulation results indicate that the algorithm can improve the detection performance and stability. The Real-time performance and malicious user resistance ability are also better than that of the adaptive cooperative spectrum sensing method and traditional K rank cooperation spectrum sensing algorithm.

Key word：
credibility

SNR

adaptability

cooperative sensing

cognitive radio

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Hadoop based anomaly flow detection and analysis platform of cloud computing

DOI：10.16157/j.issn.0258-7998.2015.05.027

Author：Xiao Tiwei

Author Affilications：Neijiang Vocational&Technical College，Neijiang 641000，China

Abstract：Hadoop system is an open source distribute cloud computing and is applied to a lot of services, the servers is easily attacked, based on that, an anomaly flow detection and analysis platform is developed based on the Hadoop system. Firstly, all the flow information is abstracted from all the files which store the flow information by Mapper period. Then, with Reducer，the anomaly flow information is abstracted and stored. By storing, detection and analysis of the flow data the attacks are detected and the security is protected. As the produced software platform is built based on Hadoop, the cost is very low. At the same time, based on Java language, the software can run on many operations. Experiments based on the real LAN show that the produced software can detect the anomaly flow successfully and has a good GUI.

Key word：
cloud computing

Hadoop

distribution computing

anomaly flow

detection and analysis

network attack

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Two phases rule based SQL injection attacks prevention schema in RFID system

DOI：10.16157/j.issn.0258-7998.2015.05.029

Author：Qiu Chunhong1，Jia Liguo2

Author Affilications：1.Jiangsu Vocational College of Business，Nantong 226011，China； 2.Hebei Normal University Dean′s Office，Shijiazhuang 050024，China

Abstract：SQL injection attacks is one of the main attack types, the corresponding prevention approach need to be efficient and low cost due to the high throughput of the RFID system, a new detection and prevention approach is proposed based on two phase rule to solve that problem. Firstly, a rule set is set up in accordance with the legal data region. Then, the detection to the layout and the content of the data in the RFID tag is processed, the illegal characters are labeled and discarded. Lastly, the detection to the layout and content of the SQL queries which are generated dynamically are processed, the illegal characters are labeled and discarded. Experimental results prove that proposed approach can successfully detect and prevent the main injection attacks, and has low computation cost, at the same time, the approach can prevent the second order injection.

Key word：
SQL injection attack

RFID system

second order injection attack

middleware

malicious user

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A public auditing method of data privacy protection based on TPA in cloud storage

DOI：10.16157/j.issn.0258-7998.2015.05.030

Author：Du Zhaohui1，Wang Jianxi2

Author Affilications：1.Department of Computer Science，Guangdong Vocational Collage Post and Telecom，Guangzhou 510630，China； 2.School of Software，Pingdingshan University，Pingdingshan 467000，China

Abstract： The integrity and privacy of users′ data in cloud storage can be easily destroyed, to solve this problem, an effective method ensure the integrity and privacy of data in cloud storage is proposed. Firstly, the privacy protection public auditing algorithm is defined. Then, a public auditing scheme performs data auditing on behalf of user with the third party auditor(TPA) is proposed. Finally, proposed scheme is expanded to the situation of multiple auditing delegations from multiple users. High security and privacy of proposed scheme has been verified on the random oracle model, analysis results of computation overhead show that it is more efficiently than other excellent schema on service computing.

Key word：
cloud storage

data integrity

privacy protection

public auditing

third party certification

batch auditing

View(8300)

Cross layer optimization based periodic wireless sensor network model

DOI：10.16157/j.issn.0258-7998.2015.05.031

Author：Chai Qun，Wu Xiaoping，Liang Jianbo

Author Affilications：School of Information Engineering，Kai Li University，Kaili 556011，China

Abstract： Based on the cross layer optimization protocol, a new model is proposed. Firstly, based on the energy efficient tree and the schedule program of the protocol，three target cost functions are setup according to the different targets. Then, a series of reasonable constraint are designed for the energy efficient tree and the schedule program, and the constrain conditions for upper bound and lower bound to increase the speed. Lastly, with the solution software，the optimal lifetime is computed and the delay of the data transfer is reduced. Experiments result prove that, compared with the protocol, the proposed model improves the network lifetime and throughput, and reduces the data transfer delay.

Key word：
periodic wireless sensor network

cross layer optimization

target cost function

constraint condition

optimal solution

View(4614)

Power Supply Technology and Its Application

A double-power four-input terminals three-level three-phase invertor

DOI：10.16157/j.issn.0258-7998.2015.05.032

Author：Li Wenpeng，Zhang Yuxiang，Zhang Xiaorong，Cao Wenyan，Guo Min，Zhang Haichao

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

Abstract：This paper presents a double-power four-input terminals three-level inverter topology with Pre-Buck converter and uses the modulation of the third harmonic injection. The circuit of double power Vs and Pre-Buck converters supplys four levels voltage,and the inventer circuit works on different voltage by various situation. Buck circuit can regulage the DC side voltage,and the inventer has a wide range working voltage. The third harmonic injection modulation can achieve lower switching loss and less harmonic content of the output voltage and current. The working principle and controlling means of the inverter during different models is analyzed. Finally the simulation shows the feasibility and valid of the double-power four-input terminal three-level inverter topology.

Key word：
double-power

Buck converter

four-input terminal

three-level inverter

third harmonic injection

View(8390)

Research on ultra high frequency voltage resonant inverter parallel characteristics based on LLC load

DOI：10.16157/j.issn.0258-7998.2015.05.033

Author：Zhang Zhijuan，Deng Chaoyun

Author Affilications：School of Electrical and Electronic Engineering，North China Electric Power University，Baoding 071003，China

Abstract：This article researches on ultra high frequency induction heating voltage resonant parallel operation with 1 MHz level based on LLC load and analyzes the inverters′ characteristics with differentseries inductance in theory. It also explores the changing of the inverter commutation angle and LLC quality factors with different series inductance,and studies the changing of commutation angle when the inverter input voltage is different. It concludes that voltage resonant inverters′commutation angle is obviously smaller with 1 MHz level. The inverter can be guaranteed to work in small inductive commutation state. Finally，the correctness of theoretical analysis through MATLAB/Simulink experiment is verified，and the simulation results are analyzed comprehensively.

Key word：
LLC load

ultra high frequency

inverters parallel

commutation angle

View(8040)

Performance comparison of four classic transmission structures for MCR-WPT

DOI：10.16157/j.issn.0258-7998.2015.05.035

Author：Zhong Chenming，Luo Bin，Liu Wan，Ning Feng

Author Affilications：College of Information Engineering，Nanchang University，Nanchang 330031，China

Abstract： In this paper, a theoretical analysis on the transferred power and the efficiency of MCR-WPT system models with four classic transmission structure(SS, SP, PP and PS) is proposed via circuit theory, as well as a performance evaluated method introduced for comparing the transferred power and the efficiency. Numerical simulations and experimental results show the Series-Series type(SS) is more suitable for wireless power transfer system based on magnetic resonant coupling，and the anti-interference performance of SS and SP is better than that of PP and PS.

Key word：
wireless power transfer

efficacy coefficient

transferred power

transmission efficiency

View(17782)

Aeronautical lithium battery work character study based on equivalent circuit analysis

DOI：10.16157/j.issn.0258-7998.2015.05.034

Author：Wang Shunli1，2，Shang Liping1，2，Shu Siqi1，Xia Chengcheng1，Qu Wei1

Author Affilications：1.School of Information Engineering, Southwest University of Science and Technology，Mianyang 621010，China； 2.Robot Technology Used for Special Environment Key Laboratory of Sichuan Province，Mianyang 621010，China

Abstract： An aeronautical lithium battery work character analysis method is proposed based on equivalent circuit model, aiming to solve its security guarantee problem. The method is realized by constructing the equivalent circuit processing, which realizes its equivalent circuit simulation. And the work character of the aeronautical lithium battery is studied based on this method. The experimental results show that this method can achieve the equivalent circuit simulation of the aeronautical 75 Ah lithium batteries. The equivalent model can effectively analyze the battery work state under different conditions, providing the regular pattern of its operating characteristics. The proposed method provides security guarantee for the lithium battery aeronautical application.

Key word：
lithium battery

equivalent circuit

work character

state evaluation

security guarantee

View(7938)

Computer Technology and Its Applications

An influence maximization algorithm of boundary nodes based on degree of community

DOI：10.16157/j.issn.0258-7998.2015.05.036

Author：Wang Shuang，Li Bin，Liu Xuejun，Hu Ping

Author Affilications：College of Electronic and Information Engineering, Nanjing Tech University，Nanjing 211816，China

Abstract：Information spread is more practical significance between communities, and a wide range of information spread is also cross-community. In this respect, the paper presents an influence maximization algorithm based on degree of community for boundary node, utilizes the community structure of social network to research boundary nodes which transfer information outwardly to other communities, thereby shrinking the range of initial nodes to reduce the computational complexity. At the same time, in order to assess the influence of the nodes accurately, the integrated node degree, the number of community nodes connected directly and the size of the communities are used as community degrees to measure the importance of the nodes in the dissemination of information among the community. Finally, the proposed algorithm has a greater impact on the spread of range and lower time complexity when compared with others through experiments to validate the algorithm.

Key word：
influence maximization

community degree

boundary node

social network

View(7910)

Design of an HMDASS based on BCI

DOI：10.16157/j.issn.0258-7998.2015.05.037

Author：Wang Ning，Sun Guangjin，Liu Xuewen

Author Affilications：The 27th Research Institute of China Electronics Technology Group Corporation，Zhengzhou 450047，China

Abstract：The traditional helmet mounted display and sight system(HMDASS) uses targeting tool coupling sensors to line of sight. Images from the sensors are showed to observers with monitor of the helmet. Accordingly a closed-loop system comes into being. This paper puts forward the design of an HMDASS based on brain-computer interface(BCI). Meanwhile the workflow and algorithm design of the system are given. The simulation indicates that the system has high target recognition accuracy, fast system response speed and good interactive experience. Thus the system has the value of in-depth study.

Key word：
BCI

HMDASS

SSVEP

MOVEP

View(7986)

Study on face recognition algorithm against illumination change

DOI：10.16157/j.issn.0258-7998.2015.05.038

Author：Ouyang Ning，Zhong Huanhong，Yuan Hua，Mo Jianwen

Author Affilications：School of Electronic and Technology，Guilin University of Electronic Technology，Guilin 541004，China

Abstract：In order to enhance the robustness of face recognition to illumination change, an illumination preprocessing algorithm of face image with fusing several algorithms is proposed. Firstly, the luminance component L is estimated from the original image according to the improved adaptive smoothing(IAS) algorithm, then reflection components R is obtained using Retinex algorithm. At the same time, the local contrast enhancement(LCE) algorithm is used to enhance image details. And the reweighted method based on the standard deviation(SD) is also adopted to calculate the weight and combine several algorithms effectively. Finally, sparse representation based classification(SRC) is used to classify. The experiment results on the Yale B face databases show that the proposed algorithm has higher recognition rate than the single pretreatment algorithm, and in the single training sample and poor lighting condition，this method can also achieve good recognition result, and has better robustness to illumination change.

Key word：
face recognition

sparse representation

adaptive smoothing

local contrast enhancement

standard deviation

View(11238)

Implementation of remote upgrade of monitoring terminal software in construction vehicle

DOI：10.16157/j.issn.0258-7998.2015.05.039

Author：Lin Xiaosong1，2，Chen Huibin1，Lin Shaofen2，Jiang Xiaoxia2

Author Affilications：1.Information Engineering Institute，Jimei University，Xiamen 361021，China； 2.Marine Engineering Institute，Jimei University，Xiamen 361021，China

Abstract： Aiming at the problems of remote software upgrading and maintenance of monitoring terminal for construction vehicle，a method of wireless remote upgrade based on LabVIEW，CDMA network and ATMEGA128 is put forward. The designed software of upgrade platform based on LabVIEW allows application program to be sent to the remote monitoring terminal of construction vehicle according to the designed protocol standards, and the terminals obtains and analyses the data via CDMA wireless network. During the update, the CRC16 is used to reduce the BER(Bit Error Rate) in communication, which guarantees the accuracy of remote software upgrade and improves the maintainability of monitoring terminal for construction vehicle.

Key word：
remote upgrade

IAP

CDMA

communication protocol

View(7966)

Video signal classification of compressed sensing and dynamic texture model

DOI：10.16157/j.issn.0258-7998.2015.05.040

Author：Jiang Xingguo，Li Zhifeng，Zhang Long

Author Affilications：School of Information and Communication，Guilin University of Electronic Technology，Guilin 541004，China

Abstract： Based on the feature of dynamic texture in video data, this paper presents a method, which combine with the technology of video compressive sensing. Firstly,a few video sampling data is gotten using the technology of compressive sampling. Then linear dynamical system is set up and the model parameters from the little sampling data also are estimated. Finally, the martin distance between models is calculated to classify texture video data. Results show that at the sampling rate of 20%，the rate of accuracy about classifying video data is over 87% using the proposed method.

Key word：
dynamic texture model

compressed sensing

Martin distance

video signal classification

View(5106)

Research on three-dimensional route planning based on improved A* algorithm

DOI：10.16157/j.issn.0258-7998.2015.05.041

Author：Tang Xiaodong1，2，Wu Jing1，2

Author Affilications：1.School of Information Engineering，Southwest University of Science and Technology，Mianyang 621010，China； 2.Robot Technology Used for Special Environment Key Laboratory of Sichuan Province，Mianyang 621010，China

Abstract：When A* search algorithm is executed in path-searching in 3D environment，it will cost a lot of time and memory because of large searching space. This paper represents an improved A* algorithm which uses mobility restrictions and UAV mission to achieve the purpose of narrowing the search space, while the management of open tables are modified to reduce the time which costs by sorting node. It could carry out a route which can meet the performance requirements of UAV in this way. Simulation results show that this approach can ensure faster to carry out the route which is close to optimal.

Key word：
UAV

route planning

improved A* algorithm

View(9502)

Integrated navigation system implemented on the quad-rotor UAV

DOI：10.16157/j.issn.0258-7998.2015.05.042

Author：Huang Jian1，Hu Yueli1，2，Yang Wenrong2，Ran Feng2

Author Affilications：1.College of Mechatronic Engineering and Automation，Shanghai University，Shanghai 200072，China； 2.Microelectronic Research and Development Center，Shanghai University，Shanghai 200072，China

Abstract： An information fusion scheme based on the inertial navigation system(INS)/GPS integrated navigation system is presented according to the rapid development of unmanned aerial vehicle(UAV)industry and the importance of navigation system on UAV. The principle of strapdown inertial navigation and the algorithm of attitude matrix are carried out in this paper. Then, the extended Kalman filter of INS/GPS integrated navigation system is built up after calculating and compensating the sensor error. Simulation results show that the working performance of the integrated navigation system is better than that of the pure inertial navigation system and can provide high precision of navigation for UAV. Finally, the integrated navigation system is realized on the quad-rotor UAV.

2015 No. 05

Publish Date：2015-05-06

ISSN：0258-7998

CN：11-2305/TN

Review and Comment

Key word： low-voltage low-power PLL View(7844)

Embedded Technology

Key word： real-time operating system STM32 FreeRTOS porting PTZ control View(16190)

Key word： indication of shots laser positioning high precision automatic View(13690)

Key word： car audio system auto gain compensation volume compensation loudness compensation View(11642)

Key word： MSP430 CS8900A CC1100 embedded Web service View(10294)

Key word： multicast unicast middleware DM3730 embedded View(8918)

Key word： multi-DSP FPGA image compression JPEG2000 parallel process View(6994)

Key word： 3D video stereo-packing algorithm decoder design FPGA/SoC co-platform View(9156)

Microelectronic Technology

Key word： differential power analysis fault attack pipeline countermeasure View(8998)

Key word： controller power amplifier module WCDMA View(7832)

Key word： wireless sensor network MAC ASIC IEEE 802.15.4 CSMA-CA View(7236)

Key word： rectifier low input RF power high efficiency harmonic suppression View(13562)

Key word： CMOS power amplifier the third-order intermodulation distortion capacitance compensation View(7246)

Measurement Control Technology and Instruments

Key word： D C bias sound discriminant wireless alarm View(6964)

Key word： Arduino oocyte retrieval vacuum device thermostatic test tube rack PID control algorithm View(11070)

Key word： electrical impedance tomography lung ventilation imaging real-time imaging CGLS algorithm View(8976)

Key word： denoising threshold vibration motor View(12032)

Key word： cable matching self-adaption multi-core cable STM32F103 View(7844)

Key word： Kalman filtering integrated navigation systems GPS/INS BP neural network View(15382)

Key word： sparse representation image de-blurring gradient projection algorithm the first satellite of high resolution View(9988)

Key word： texture filter cardinality constrain View(6596)

Key word： MIMO-OFDM system CAZAC sequence timing synchronization Integer-Frequency-Offset View(6428)

Key word： direct communication between the trains close yagi antenna full fold dipole genetic algorithm View(7062)

Key word： power line carrier communication frequency hopping OFDM gradient search View(5454)

Key word： synchronous orthogonal network routing metric multi-channel network throughput broadcast mechanism View(4276)

Key word： carrier aggregation uplink control channel hybrid automatic repeat request low delay View(5566)

Key word： credibility SNR adaptability cooperative sensing cognitive radio View(6606)

Key word： cloud computing Hadoop distribution computing anomaly flow detection and analysis network attack View(7666)

Key word： SQL injection attack RFID system second order injection attack middleware malicious user View(7850)

Key word： cloud storage data integrity privacy protection public auditing third party certification batch auditing View(8300)

Key word： periodic wireless sensor network cross layer optimization target cost function constraint condition optimal solution View(4614)