2017 No. 07-Application of Electronic Technique

Special Column-RF and Microwave

RF and microwave technology in security application

DOI：10.16157/j.issn.0258-7998.2017.07.001

Author：Duan Weiqian，Hu Anyong，Miao Jungang

Author Affilications：Key Laboratory of Microwave Sensing and Security Applications，Beijing University of Aeronautics and Astronautics， Beijing 100191，China

Abstract：Radio frequency(RF) and microwave makes effective supplement to other security detection methods due to its unique characteristics. This benefit brings rapid progress of research in the field of security application, and has played an important role in the field of import and export of human security, small UAV capture, border security, electronic radio frequency identification(RFID) and other occasions. In today′s more and more complex security environment, RF and microwave technology has become an indispensable part in protecting public safety.

Key word：
radio frequency and microwave

security application

human security

unmanned aerial vehicle capture

millimeter-wave radar

View(16306)

Design of a 2～6 GHz broadband power amplifier module

DOI：10.16157/j.issn.0258-7998.2017.07.002

Author：Wang Haoquan1，2，3，Guo Hao1，2，3，Hao Mingli1，2

Author Affilications：1.Beijing Key Laboratory of Radio Frequency IC Technology for Next Generation Communications， Institute of Microelectronics of Chinese Academy of Sciences，Beijing 100029，China； 2.R&D Center of HealthCare Electronics，Institute of Microelectronics of Chinese Academy of Sciences，Beijing 100029，China； 3.School of Electronic，Electrical and Communication Engineering，University of Chinese Academy of Sciences，Beijing 101400，China

Abstract：In this paper, a GaN wideband power amplifier is designed. A wideband power amplifier of 2～6 GHz based on CREE CGHV60040D chip model is designed, with modeling and electromagnetic field simulation of bonding wire and micro-strip，designing and optimizing load impedance matching in simulation software with the principle of optimal load matching network. The pulse signal measured results show that the broadband power amplifier module has a good performance in the wide band of 1.8～5.5 GHz, thegain is 10～13 dB, the output power is above 43 dBm, and the power added efficiency(PAE) is above 40%.

Key word：
2～6 GHz

output power

PAE

View(17920)

Three-band high radiation stability divisive growing type fractal microstrip antenna

DOI：10.16157/j.issn.0258-7998.2017.07.003

Author：Lin Bin1，You Baiqiang2

Author Affilications：1.School of Information Science and Technology，Xiamen University Tan Kah Kee College，Zhangzhou 363105，China； 2.School of Information Science and Technology，Xiamen University，Xiamen 361005，China

Abstract：In view of the requirements of multiple frequency bands working systems, such as mobile communication system and the Radio Frequency Identification(RFID) system, a new divisive growing type fractal structure is proposed. The PI type quadrilateral snowflake structure is used to going on divisive growing type fractal iterative calculation, with which implements a highly integrated equivalent composite radiation edge, and designed a divisive growing type fractal microstrip antenna. This antenna can cover the 900 MHz frequency band and 1.9 GHz frequency band of mobile communication system, 2.45 GHz frequency band of the RFID system at the same time. The return loss minimum values of three working frequency bands are all below -20 dB, and the working bandwidth of three working frequency bands are all better than 0.2 GHz. The radiation characteristics of antenna are all have high stability in three working frequency bands. This novel antenna successfully realizes the compatible of mobile communication system and the RFID system, and ready for appalling to mobile communication and remote identification and payment system.

Key word：
divisive growing type fractal structure

fractal antenna

mobile communication system

RFID system

remote identification and payment

View(9450)

Development of 9.4T MRI high pass birdcage coil

DOI：10.16157/j.issn.0258-7998.2017.07.004

Author：Chen Siming1，2，Zhang Xuelei1

Author Affilications：1.High Magnetic Field Laboratory of the Chinese Academy of Sciences，Hefei 230000，China； 2.University of Science and Technology of China，Hefei 230000，China

Abstract：Based on quadrature exciting and receiving technologies, a set of transmitting and receiving bird cage coil was designed and manufactured. The resonance can reach 400 MHz and imaging of atom H can also be attained on the 9.4 T imaging system. The workbench test result indicated that the bird cage coil reached a high Q value and the isolation of the two channels was 20 dB. At the same time, the sample test was conducted whose results showed that the image was of high uniformity, image SNR and clearness. Featuring simple design process and low cost, the birdcage coil has the model significance to the design and manufacturing of RF coils in ultra-high magnetic field imaging.

Key word：
9.4T radiofrequency coil

birdcage coil

tuning

signal to noise ratio(SNR)

View(29322)

Design and implementation of a digitally controlled wideband analog complex correlator

DOI：10.16157/j.issn.0258-7998.2017.07.005

Author：Xin Xin，Wang Chao，Hu Anyong，Miao Jungang

Author Affilications：Beijing Key Laboratory of Microwave Perception and Security Applications，Beijing University of Aeronautics and Astronautics， Beijing 100191，China

Abstract：A 1.5 GHz～2.5 GHz analog complex correlator using “add and square” scheme was designed and implemented for passive millimeter-wave imaging applications. A digital gain and offset control scheme was adopted. The results of single frequency test show that the output amplitude variation is less than 1.5 dB, and the equivalent correlation bandwidth is 0.905 GHz. Meanwhile, the results of broadband noise measurement show that the correlator phase accuracy is better than 2.5°. At last, an experiment under low SNR environment is carried out to evaluate the influence on the signal-to-noise ratio(SNR) brought by different input power. The results show that in the range of -20~-10 dBm, SNR becomes higher as input power increases and SNR is 13 dB when input power reaches -13 dBm.

Key word：
millimeter-wave

passive imaging

complex correlation

analog complex correlator

View(9964)

Review and Comment

Study of massive MIMO key technologies for 5G

DOI：10.16157/j.issn.0258-7998.2017.07.006

Author：Wang Qianzhu，Qiu Congcong，Huang Deling

Author Affilications：School of Communications and Information Engineering，Chongqing University of Posts and Telecommunications， Chongqing 400065，China

Abstract：The fifth-generation(5G) mobile communications system has got extensive attention and research by enterprises, research institutes and universities of the world at present. Massive MIMO technology is considered to be an important technology in the future 5G. It is mainly used to improve the spectrum efficiency and power efficiency of the communication system. The advantage of massive MIMO and standardized process of MIMO were described and summarized in detail. The main application scenarios were analyzed. From channel measurement and channel modeling, the massive MIMO are introduced, the channel estimation, precoding techniques and signal detection technologys were analyzed. At last, massive MIMO was summarized.

Key word：
the fifth-generation mobile communications

massive MIMO

channel estimation

precoding

signal detection

View(86064)

Microelectronic Technology

Attack chip′s active shield based on FIB technology

DOI：10.16157/j.issn.0258-7998.2017.07.007

Author：Wang Min1，2，Liu Ying3，Shao Jin1，2，Hu Xiaobo1，2，Liu Liang1，2，Zhao Dongyan1，2，Zhang Haifeng1，2，Yin Guolong1，4

Author Affilications：1.Beijing Smartchip Microelectronics Technology Company Limited，Key Laboratory of State Grid Corporation， Laboratory of Power Chip Design and Analysis，Beijing 100192，China； 2.Beijing Smartchip Microelectronics Technology Company Limited, High-reliability IC Design Engineering Technology Research Center of Beijing Power,Beijing 100192，China； 3.The Ministry of Information and Communication of State Grid Corporation，Beijing 100088，China； 4.The State Grid Ningxia Electric Power Company，Yinchuan 750001，China

Abstract：The top of security chip were usually covered with active shielding layer to prevent invasive physical exploration，tampering attacks on part of the chip′s function modules, to obtain the chip′s critical storage data and sensitive information. This paper presents a method based on Focused Ion beam(FIB) technology to attack on chip’s active shield, which can avoid layer detection and implement attacking on the existing static or dynamic detection for Security Chip′s active shield. This method is simple,direct and highly operable, providing with important practical implications for the chip’s security design and attacks. We use this attack method, achieving invasive attacks on the smart IC card successfully，capturing the chip′s RAM memory output data signals, also re-activating the chip′s test mode.

Key word：
security chip

active shield

FIB

invasive attack

View(14036)

A low-power quadrature signal generation VCO based on current reusing technology

DOI：10.16157/j.issn.0258-7998.2017.07.008

Author：Zhang Dingding1，2，3，Zhang Zhaofeng1，3，Liao Youchun1，2

Author Affilications：1.Shanghai Advanced Research Institute，Chinese Academy of Sciences，Shanghai 201210，China； 2.University of Chinese Academy of Science，Beijing 100049，China； 3.ShanghaiTech University，Shanghai 201210，China

Abstract：A low-power quadrature signal generator Voltage Controlled Oscillator(VCO) is implemented for quadrature upconversion and downconversion transceiver for Bluetooth Low Energy(BLE) application. Compared to conventional VCO based on current reusing technology, the stacked VCO and divide-by-two frequency divider has tail current source to help decrease current consumption. Besides, the phase noise requirements of BLE is satisfied. The simulation results based on TSMC 0.18 μm process show that the phase noise is -126 dBc/Hz at 1 MHz offset for 849.7 MHz quadrature signal. The VCO and divider consume only 1.05 mA from a 1.8 V supply, achieving FoM of 181 dBc. The overall frequency range of the quadrature signal is about 783~866 MHz, and the area of the chip is 0.38 mm2. This design meet the requirements of frequency range and phase noise of BLE, and has guiding significance for other low power RF applications.

Key word：
current reusing

low power

quadrature signal

View(14114)

Real-time data processing design of CMOS camera based on FPGA

DOI：10.16157/j.issn.0258-7998.2017.07.009

Author：Hou Xuxu1，Ma Songling1，Sun Chen2，Guo Zijing1

Author Affilications：1.Mechanical & Electrical Engineering College，Xi′an University of Architecture and Technology，Xi′an 710055，China； 2.Xi′an Institute of Optics and Precision Mechanics，Chinese Academy of Sciences，Xi′an 710119，China

Abstract：Aiming at the problem that the LVDS serial data error rate rised output by CMOS image sensor due to the data can not be aligned and reduce the image resolution, a research program of CMOS camera real-time data processing based on FPGA is proposed. The design uses VHDL hardware language, the modular design of data processing to ensure the correct sampling of high speed data to reduce the error generated. The simulation results show that the scheme is reasonable and the system runs stably and reliably. It solves the problem of data correction in high speed transmission of high resolution images. The output image has clear contour and no speckle.

Key word：
CMOS image sensor

FPGA

data correction

high resolution

View(11442)

A dual-frequency RFID transponder and power management circuits

DOI：10.16157/j.issn.0258-7998.2017.07.010

Author：Kong Lingrong

Author Affilications：Invengo Information Technology Co.，Ltd.，Shenzhen 518057，China

Abstract：A dual frequency RFID solution was proposed, which two frequency band RFID functions were integrated into one die and shared the common power and memory. The conflict problems of the chip powered by two frequency band simultaneously and the memory accessed by two frequency band simultaneously were solved. A transponder circuit featuring a UHF ISO 18000-6C RF and a LF ISO11784 and ISO 11785 function was designed, and the power management circuits were represented. The chip was taped out and tested, the test result showed that the dual frequency RFID transponder can work normally and its sensitivity and reading tag range is equivalent to the same kind single frequency RFID tag.

Key word：
dual frequency

RFID

transponder state detect

power management

View(15444)

Miniaturization balun design based on LTCC technology

DOI：10.16157/j.issn.0258-7998.2017.07.011

Author：Liu Hong，Ye Qiang

Author Affilications：College of Information Engineering，China Jiliang University，Hangzhou 310018，China

Abstract：Based on LTCC(Low Temperature Co-fired Ceramic) technology to design a kind of miniaturization Balun. This paper designs the miniaturization of Balun use Marchand Balun structure and three-dimensional integrated structure of LTCC, inside the Balun stripline using wide-brimmed stripline structure, adopt the way of spiral, this structure can reduce the volume balance. The balun's bandwidth is 2.4 GHz to 2.5 GHz, size is 2.0 mm×1.25 mm×0.8 mm, the balance not only small insertion loss, but also the balance port output has a good amplitude balance and 180° phase difference.

Key word：
Balun

LTCC

miniaturization

three-dimensional

integration

View(16356)

SiP-system in package design and simulation technology

DOI：10.16157/j.issn.0258-7998.2017.07.012

Author：Li Yang

Author Affilications：AcconSys Technology Co.，Ltd，Beijing 100045，China

Abstract：SiP(System in Package) technology is becoming a hot spot of current electronic technology development, many international and domestic research institutes and companies see SiP technology as an important development direction. This paper introduces SiP design and simulation technology and application, based on practical engineering projects, describes the latest design and simulation methods, and puts forward the problems that should be paid attention to in SiP design and simulation process.

Key word：
SiP-system in package

bond wire

cavity

chip stack

SiP simulation

View(17550)

Embedded Technology

Design of PD radar signal processor based on multi-DSP

DOI：10.16157/j.issn.0258-7998.2017.07.013

Author：Yao Wang，Jin Hongxin，Zhao Pengfei，Cong Yanchao，Wang Xue

Author Affilications：China Academy of Launch Vehicle Technology，Beijing 100076，China

Abstract：In order to satisfy the need of Pulse Doppler(PD) pulse compression radar high speed data processing，this paper designs a high-speed PD radar signal processor based on multi-DSP architecture, describes the processor hardware scheme, software design, algorithm mapping method，and applies software pipe-lining techniques for signal processing algorithm and the process of optimization design. It verifies the processing result of Linear Frequency Modulation(LFM) signal, and analyzes the real-time performance.

Key word：
radar

processor

DSP

View(10742)

The development of USB driver component based on K64

DOI：10.16157/j.issn.0258-7998.2017.07.014

Author：Hu Weiwei1，Wang Yihuai1，Zhang Yong2

Author Affilications：1.College of Computer Science and Technology，Soochow University，Suzhou 215006，China； 2.Suzhou Huaxiang Information Technology Company，Suzhou 215006，China

Abstract：USB has developed into one major means of current data-communication due to its rewarding features , including hot-plugging availability, simplified interface, convenient extension and high-efficiency transmission. Due to the complexity of USB protocol stack, it is difficult to develop the driver. Furthermore, much repeated work exists in the development process because of the variety of the hardware platform. Therefore, the USB driver component is designed in accordance with the USB protocol stack and the thought of driver component. Then it is tested using the K64 MCU from NXP Semiconductor in the KDS 3.0 IDE, which works as a HID device to communicate with PC software. This provides the basic rules and references for the development of USB driver component.

Key word：
USB

driver component

K64

enumeration

View(6520)

Implementation of Boost converter control based on the export method of System Generator model

DOI：10.16157/j.issn.0258-7998.2017.07.015

Author：Liu Chaoyong1，Wang Suichao2，Zheng Xiancheng2

Author Affilications：1.Shanghai Aircraft Design and Research Institute，Shanghai 201210，China； 2.School of Automation，Northwestern Polytechnical University，Xi′an 710000，China

Abstract：This paper utilizes the System Generator software platform to implement the model of a Boost converter based on modular modeling method and simplify the complex process of using language to compile the control system directly. The study shows how to export the control algorithm built using the modular modeling method in MATLAB-Xilinx environment. The proposed modeling procedure has been verified through the simulation in MATLAB, co-simulation and validated via experiment.

Key word：
System Generator

modular modeling

control algorithm export

View(10294)

The design and implementation of multi-channel GNSS data acquisition platform

DOI：10.16157/j.issn.0258-7998.2017.07.016

Author：Zhao Yudong，Qin Honglei，Zhang Runping

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

Abstract：With the development of GNSS systems, multi-path has become to one of the important factors that influence the positioning accuracy and reliability. In order to test the multi-path eliminating status with the method of antenna arrays, the requested platform needs to collect and save the data from each antenna at the same time.In order to achieve this target, this paper uses the PCIE-based FPGA development board and multi-channel AD acquisition card to make a data collection platform. This paper begins with a brief introduction of the structure of this data collection platform and the construction of the communication link by PCIE bus,then it proposes a mechanism for consecutive data storage.Finally a experiment is designed to verify the feasibility of the method and the performance of the whole platform.

Key word：
antenna array

PCIE bus

AD acquisition

consecutive storage

View(9246)

Design of FMCW radar for searching and surveillance

DOI：10.16157/j.issn.0258-7998.2017.07.017

Author：Fang Dechuang1，Zhang Lei2，Wang Lutao1

Author Affilications：1.School of Computer Science，Chengdu University of Information Technology，Chengdu 610225，China； 2.Defense Key Subject Laboratory of Aero and Ground Laser Communication Technology， Changchun University of Science and Technology，Changchun 130022，China

Abstract：Based on the technology of frequency modulation continuous wave, a design scheme of the light radar for the search and surveillance of sea surface target is presented. The scheme uses AD9914 to generate high bandwidth, low spurious sweep signal, the reflection power cancellation technology and high speed, high precision analog digital conversion chip AD9467 to achieve weak target echo signal reception. The design of the system is composed of 7 functional modules, and the data exchange between the modules is based on the high speed optical fiber interface, meanwhile, the electromagnetic compatibility of the system is improved, and it is easy to be deployed in various platforms. The experimental results show that the system can effectively distinguish adjacent targets, and the detection sensitivity can meet the design requirements.

Key word：
frequency modulated continuous wave

radar

weak target

surveillance

View(12224)

Measurement Control Technology and Instruments

Research and implementation of multi-card multi-mode satellite signal simulator

DOI：10.16157/j.issn.0258-7998.2017.07.018

Author：Jiang Dongfang1，2，Ji Yuanfa1，2，Sun Xiyan1，2

Author Affilications：1.School of Information and Communication，Guilin University of Electronic Technology，Guilin 541004，China； 2.Guangxi Key Laboratory of Precision Navigation Technology and Application，Guilin 541004，China

Abstract：For the issue of multi-mode multi-frequency satellite signal simulator system occupies a large resource of hardware and difficult to achieve, this paper puts forward a multi-board transmission and synchronization mode to generate satellite navigation signals. The scheme makes FPGA+DSP as the core processor, and integrates high-speed D/A conversion and RF up-conversion circuit, detailing the design of high-speed signal transmission and synchronization. The co-locating test result shows that the scheme effectively reduces the error of different hardware platforms and chips bring, possessing the characteristics of flexible, stable and reliable, having important significance for low-cost to achieve the design of multi-mode multi-frequency satellite signal simulator system.

Key word：
GNSS satellite signal simulator

FPGA

multi-board

clock domain crossing

source synchronous

View(14518)

The design and experimental study of a miniaturized cloud liquid water sensor

DOI：10.16157/j.issn.0258-7998.2017.07.019

Author：Wang Cong1，2，3，Liu Qingquan1，2，3，Yang Jie4，Ding Renhui5

Author Affilications：1.Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology，Nanjing 210044，China； 2.College of Electronics and Information Engineering，Nanjing University of Information Science and Technology， Nanjing 210044，China； 3.Jiangsu Key Laboratory of Meteorological Observation and Signal Processing，Nanjing 210044，China； 4.School of Atmospheric Physics，Nanjing University of Information Science and Technology，Nanjing 210044，China； 5.Jiangsu Meteorological Observation Center，Nanjing 210009，China

Abstract：Traditional cloud liquid water sensors feature relatively large measurement error, high power and low precision. A miniaturized cloud liquid water sensor which can be carried by radiosonde has been designed. It mainly consists of a sensor probe, an embedded processing circuit, an analog signal detection circuit and a data transmission unit. A computational fluid dynamics method is implemented to simulate the sensor probe and to verify the feasibility of the cloud liquid water sensor. A fuzzy adaptive PID algorithm is employed to control the temperature of the sensor, which is beneficial to improve the stability of the system. A measurement and control circuit based on a 24-bit ADC is designed to improve the measurement accuracy. The experiment results show that the sensor consumes only 1.63 W power, when the cloud liquid water content is 1.0 g/m3. Compared with traditional cloud liquid water content sensors, this new sensor has the advantages of low power consumption and high precision.

Key word：
cloud liquid water sensor

computational fluid dynamics

PID algorithm

View(8788)

Study on simulation system of high speed GJB289A bus

DOI：10.16157/j.issn.0258-7998.2017.07.020

Author：Wang Zhongjie

Author Affilications：Chinees Flight Test Establishment，Yanliang 710089，China

Abstract：With the development of the military avionics system, airborne data bus transfer rate is higher and higher. The standard GJB289A bus(1 Mb/s) is unable to meet the demand of the development of high throughput airborne data bus, so the high-speed GJB289A bus technology is one of the current development trend of airborne data bus.In order to study of high-speed GJB289A bus technology, this paper builds a simulation system, and introduces its topology structure, working principle and the importance of building simulation system.

Key word：
high-speed GJB289A bus

simulation system

View(8900)

Electrical control system design for a high throughput and addressable cell capture biochip

DOI：10.16157/j.issn.0258-7998.2017.07.021

Author：Li Shenghui1，2，3，Lu Xiaodong2，Huang Chengjun2，3

Author Affilications：1.R&D Center of Healthcare Electronics，Institute of Microelectronics of Chinese Academy of Sciences，Beijing 100029，China； 2.Beijing Key Laboratory of Radio Frequency IC Technology for Next Generation Communications， Institute of Microelectronics of Chinese Academy of Sciences，Beijing 100029，China； 3.School of Future Technology，University of Chinese Academy of Sciences，Beijing 101400，China

Abstract：For the throughput of traditional dielectrophoresis cell capture biochip is not high, or cannot address the microelectrode array, this paper introduces an electrical control system designed for high throughput and addressable cell capture biochip application, which includes a PC control software and a microcontroller unit(MCU) circuit. The MCU consists of a STM32 MCU, a signal generating unit, and the switch control unit. The measurement results show that this control system can address the specific microelectrode of a cell capture biochip which has a 32×32 microelectrodes array, and load an in-phase or out-phase sine wave on the addressed microelectrode.

Key word：
dielectrophoresis(DEP)

microfluidics

biochip

control system

cell capture

View(9026)

A novel UAV recognition algorithm based on deep learning approach

DOI：10.16157/j.issn.0258-7998.2017.07.022

Author：Jiang Zhaojun1，Cheng Xiaogang2，Peng Yaqin3，Wang Jun1，Li Zhi2

Author Affilications：1.College of Automotive and Transportation，Wuxi Institute of Technology，Wuxi 214121，China； 2.Communication and Information Engineering，Nanjing University of Posts and Telecommunications，Nanjing 210003，China； 3.College of Computer Science and Engineering，Sanjiang University，Nanjing 210012，China

Abstract：The great use of the Unmanned Aerial Vehicle(UAV) brings convenience to people, but also causes some bad effects. For instance, the UAV fly into No-fly zone which results in safety problem, and violate civil privacy due to the inappropriate use. Therefore, a UAV police system is needed to implement supervision on UAVs to contain flying randomly. Traditional identification method is used, it will cause the insufficient in flexibility and precision. This paper studies a UAV recognition algorithm based on deep learning, this method will obtain an efficient model of cognition and accomplish the classification of UAVs and non-UAVs through training a learning network modified by Convolutional Neural Networks(CNNs). The model test result shows that this method has higher expandability and the recognition rate.

Key word：
deep learning

UVA

visual sensor network

feature extraction

View(27010)

Data acquisition system for immunochromatographic singal based on FPGA

DOI：10.16157/j.issn.0258-7998.2017.07.023

Author：Li Guoqing1，2，Wei Jianchong1，2，Wang Zhijiong3，Gao Yueming1，2，Wei Mengyu2，3，Du Min1，2，Pan Shaoheng3

Author Affilications：1.College of Physics and Telecommunication Engineering，Fuzhou University，Fuzhou 350116，China； 2.Key Laboratory of Medical Instrumentation and Pharmaceutical Technology of Fujian Province，Fuzhou 350116，China； 3.Department of Electrical and Computer Engineering，Faculty of Science and Technology，University of Macau，Macao 999078，China

Abstract：This paper introduced a data acquisition system based on FPGA control for immunochromatographic assay. The system was composed of analog signal acquisition module, FPGA digital control module and PC. The FPGA digital control module consisted of A/D driver, motor driver and data transmission module. It controlled the stepper motor and the synchronized sampling of TM7705, then the sampled data was saved in RAM. The proposed system was suitable for LFIA test control, which showed good detection linearity(R2=0.998). The sensitivity of the system was 0.0277 mL/μg, the lowest detecting concentration was 1.95 μg/mL and the CV was lower than 5%. In conclusion, the system has high detection sensitivity, good stability practicability and extensibility.

Key word：
immunochromatographic

data acquisition

FPGA control

View(16296)

Design and analysis of data sharing transmission protocol for high reliability sensor

DOI：10.16157/j.issn.0258-7998.2017.07.024

Author：Meng Feng1，Xiao Zheng2，Liu Junyu3

Author Affilications：1.Shenhua Group Coal Production Department，Beijing 100011，China； 2.Shenhua Group Information Management Department，Beijing 100011，China； 3.Beijing Guodiantong Network Technology Co.，Ltd，Beijing 100011，China

Abstract：Secure and efficient green intelligent mining is the goal of the development of the coal industry, the emerging intelligent mine needs a variety of intelligent sensors, and data collection, convergence transmission, data center processing capacity, reliability, stability put forward higher requirements. In order to improve the complicated conditions of coal mine and solve the existing problems in the existing data transmission link, this paper designs a data sharing transmission protocol. The simulation test shows that it can effectively improve the reliability and stability of data transmission，and improve the overall safety of intelligent mine efficient operation level.

Key word：
coal industry

smart mine

data sharing

View(7624)

Communication and Network

An encoder architecture scheme with low parallel and high speed for LDPC codes based CCSDS standard

DOI：10.16157/j.issn.0258-7998.2017.07.025

Author：Yan Wei1，2，Zhu Yan1

Author Affilications：1.National Space Science Center，Chinese Academy of Science，Beijing 100190，China； 2.University of Chinese Academy of Science，Beijing 100190，China

Abstract：An encoder architecture with low parallel for LDPC codes based CCSDS standard is proposed in this paper. By filling “0” and changing the cyclic-matrix structure, the proposed scheme implements a low parallel coding for the 7/8 rate LDPC which recommended by CCSDS. The proposed architecture achieves a balance between encode speed and hardware overhead. The results of simulation and implements show that the low parallel architecture has a better encode efficiency and higher encode speed while increasing a few hardware cost.

Key word：
CCSDS standard

low parallel architecture

7/8 rate LDPC code

View(16022)

Performance research of spatially coupled LT codes

DOI：10.16157/j.issn.0258-7998.2017.07.026

Author：Chen Zhao，Mao Minghui，Chen Bin，Zhao Zhuoya

Author Affilications：Institute of Communication Engineering，China University of Geosciences，Wuhan 430074，China

Abstract：Spatially coupled LT(Luby Transform) codes, which introduced the concept of spatial coupling into LT codes, were a new type of channel coding technology. They had been widely studied because of their good performance. This paper introduced the encoding process of spatially coupled LT codes, studied the asymptotic performance of LT codes by density evolution, and compared decoding error probability and complexity of spatial coupling LT codes under regular distribution and irregular distribution. What’s more, a plenty of simulation aimed at these two kinds of degree distribution had been done in this paper under the limited length, and analyzed and compared their performance in many aspects. The results showed that the more information bits, the lower decoding error probability when spatially coupled LT codes had low overhead, and the faster speed to approach to asymptotic performance. When used regularity and irregularity had little difference in decoding error probability, irregularity could be exploited to have better finite length performance and faster decoding speed for spatially coupled LT codes.

Key word：
spatially coupled

LT codes

asymptotic performance

density evolution

View(12666)

Small cell clustering and subcarrier allocation algorithm in ultra dense network

DOI：10.16157/j.issn.0258-7998.2017.07.027

Author：Huang Junwei1，2，Zhou Pengguang1，Zhang Renchi1，Teng Deyang1，Xu Hao1

Author Affilications：1.School of Communication and Information Engineering，Chongqing University of Posts and Telecommunications， Chongqing 400065，China； 2.Key Lab of New Generation Broadband Mobile Communication Technology，Chongqing University of Posts and Telecommunications， Chongqing 400065，China

Abstract：In the ultra dense network, the serious inter-cell interference has restricted the data rate of the users, especially the cell edge users. Effectively managing the interference and enhancing the data rate of the cell edge users are the difficult points in the ultra dense network. Based on the ultra dense network architecture, this paper proposes a new graph-based incomplete coloring algorithm, which divides the cells into several cluster in the network architecture and the different cells may share the spectrum in the same cluster. At the same time, this paper proposes a subcarrier allocation algorithm, which assigns the subcarriers with better channel gain to the cell edge users first. The simulation results show that the incomplete coloring algorithm can effectively reduce inter-cell interference and improve the system throughput, subcarrier allocation algorithm can optimize the throughput of cell edge users without affecting system throughput.

Key word：
ultra dense network

interference coordination

clustering

subcarrier allocation

View(12436)

Joint resource allocation in cooperative cognitive radio networks based on energy acquisition

DOI：10.16157/j.issn.0258-7998.2017.07.028

Author：Yang Lu，Huang Kai，Yang Pinzhang

Author Affilications：Department of Communication and Information Engineering， Chongqing University of Posts and Telecommunication，Chongqing 400065，China

Abstract：Spectrum sharing and energy harvesting are promising techniques to improve the bandwidth and energy efficiencies to meet the ever-growing demand of wireless data transmissions. This paper integrates a wireless powered communication network with a cooperative cognitive radio network, where multiple secondary users(SUs) powered wirelessly by a hybrid access point(HAP) help a primary user relay the data. As a reward for the cooperation, the secondary network gains the spectrum access where SUs transmit to HAP using time division multiple access. To maximize the sum-throughput of SUs, a secondary sum throughput optimal resource allocation scheme is presented. According to SUs’ participation degree, this scheme chooses the optimal set of relaying SUs and jointly performs the time and energy allocation for SUs under the constraint of meeting target primary rate.

Key word：
cooperative cognitive communication

spectrum sharing

energy harvesting

participation degree

resource allocation

View(7902)

Energy-balanced routing algorithm based on Game-Theory for WSNs

DOI：10.16157/j.issn.0258-7998.2017.07.029

Author：Zhu Yadong1，Gao Cuifang2

Author Affilications：1．Information Center，Jiangsu Union Technical Institute，Nanjing 211135，China； 2．School of Science，Jiangnan University，Wuxi 214112，China

Abstract：To extend the network lifetime by balancing energy consumption, evolutionary game theory-based energy balance geographical routing(EGT-EBGR) protocol is proposed in this paper. The objective of the proposed protocol is to make sensor nodes deplete their energy at approximately the same time. The transmission range of a sender is divided into serval forwarding sub-regions, evolutionary game theory(EGT) is used to balance the traffic load to available sub-regions. Greedy algorithm(GA) is used to select the best node to balance the load in the selected sub-region. This EGT and GA is shown to be an effective solution for load balancing and extending network lifetime. Simulation results show that EGT-EBGR protocol offers significant improvement over existing protocols in extending network lifetime.

Key word：
WSNs

routing

energy balance

evolutionary game theory

Greedy

View(12050)

Computer Technology and Its Applications

Intelligent sliding mode control for underwater vehicle

DOI：10.16157/j.issn.0258-7998.2017.07.030

Author：Liu Qing，Huang Runan，Chen Yong，Li Jianpo，Zhao Delin

Author Affilications：College of Electrical Engineering，Yanshan University，Qinhuangdao 066004，China

Abstract：To achieve the Autonomous Underwater Vechile(AUV)’s course tracking stably, a method of adaptive backstepping Sliding Mode Control(SMC) control algorithm based on disturbance observer is put forward. In view of the interference of diffenent degrees of water flow in the pool, a disturbance observer is used to observe the uncertainties and extern interfence. An adaptive sliding mode controller is designed to compensate for partial interference that is not observed. The proposed controller can eliminate the chattering phenomenon and guarantee the stability of the closed-loop system. At the same time, the control system can select intelligent control strategy, by judging the degree of the water flow circulation disturbance, automatically select the appropriate control strategy, and ultimately eliminate the interference, improve the tracking stability and speediness. The simulation results show that control strategy can achieve the course tracking control perfectly, and the tracking error can quickly converge to zero in finite time. The algorithm has strong robustness and good adaptability.

Key word：
Autonomous Underwater Vechile(AUV)

disturbance observer

adaptive backstepping Sliding Mode Control(SMC)

View(8010)

An image classification method combing with blocked fuzzy entropy and random forest

DOI：10.16157/j.issn.0258-7998.2017.07.031

Author：Xiao Yuling1，Wu Zheng1，Zhu Yu2

Author Affilications：1.School of Architectural Engineering，Henan Vocational College of Applied Technology，Zhengzhou 450042，China； 2.School of Information Science and Engineering，East China University of Science and Technology，Shanghai 210040，China

Abstract：To improve the performance of image classification, a new image classification method is proposed. The basic idea is：by considering the uncertainty of the content of the image as a stochastic process, blocked fuzzy entropy is used to extract image features, and random forest method is used to execute feature classification. First, it divides an image into multiple image blocks by considering the global and local properties of the image. Then, it executes fuzzy c-means clustering on each image blocks, and extracts fuzzy entropy features. And then, it obtains a fuzzy entropy feature vector of an image after feature normalization. Finally, a classifier of random forest is built, and feature classification is realized for fuzzy entropy feature vectors. Experimental results show that the method has low error-classification rate, and less time-consuming of classification.

Key word：
image classification

fuzzy entropy

random forest

fuzzy c-means

image blocks

View(14108)

Application of DFT interpolation algorithm in fault pattern recognition of coal gas blower

DOI：10.16157/j.issn.0258-7998.2017.07.032

Author：Xie Changgui1，2，Chen Ping2

Author Affilications：1.School of Mechanical Engineering，Chongqing Vocational Institute of Engineering，Chongqing 402260，China； 2.School of Mechanical Engineering，Chongqing University，Chongqing 400044，China

Abstract：A new method of discrete spectrum estimation is proposed based on the traditional interpolation method, which could be used to quickly determine the fractional part of the spectrum. The new method improves the speed and precision of the discrete spectrum estimation, and it could be applied to the fault pattern recognition of the rotating machinery such as the gas blower. Experimental results show that, the new algorithm can effectively improve the accuracy of the fault pattern recognition of the gas blower. In addition, simulation results show that the estimation error of the proposed method is lower than that of the conventional algorithm in noise conditions, and it can be applied to other classical window functions outside the Hanning window with strong compatibility and robustness. The method has a high theoretical depth and important practical significance.

Key word：
pattern recognition

interpolation algorithm

spectrum estimation

noise

View(8232)

An object classification method combing with SIFT features and neural network pool

DOI：10.16157/j.issn.0258-7998.2017.07.033

Author：Bai Yanyu1，Shen Chaoqun2，Yang Xinfeng3

Author Affilications：1.Department of Information Technology，College of Information & Business Zhongyuan University of Technology， Zhengzhou 451191，China； 2.Henan Mechanical and Electrical Vocational College，Zhengzhou 451191，China； 3.School of Computer and Information Engineering, Nanyang Institute of Technology，Nanyang 473004，China

Abstract：In order to improve the performance of object classification, a feature classification method based on neural network pool is proposed, to achieve reliable object classification by combing with SIFT features. First, this method extracts SIFT features of samples, and randomly selects sub-collections from feature vectors of samples. Then, it builds base-classifiers for every sub-collection by using radial basis function neural network. And then，it obtains many base-classifiers collections through repeat iteration process, and constructs neural network pool by combining boosting technology. Finally，it uses naive Bayes neural network model to fuse the classification results of each base-classifiers collection in neural network pool, for predicting the final classification results of features. Experimental results show that, it has high efficiency and high rate of correct classification on VOC-2007 dataset.

Key word：
object classification

neural network

scale-invariant feature transform

radial basis function

Bayes

View(10158)

Power Supply Technology and Its Application

Design and control of single-phase PFC AC/DC converter integrated with power decoupling

DOI：10.16157/j.issn.0258-7998.2017.07.035

Author：Cui Chao，Li Hongmei，Zhang Hengguo，Cao Lingling

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

Abstract：In on-board chargers(OBCs), the front-end PFC AC/DC converter outputs a ripple power pulsating at twice the line frequency. The traditional solution will decline the lifetime and reliability of OBCs. Therefore, this paper proposes the PFC AC/DC converter integrated with power decoupling circuit which features a reduction of the output pulsating power as well as the output capacitance. Then, some key parameters are firstly determined. And a novel model-free nonlinear power controller is designed for PFC AC/DC converter which provides an improvement of the static and dynamic performance and system robustness. Moreover, a quasi-PR controller is used for the power decoupling circuit to totally absorb the output pulsating power. Finally, the Simulink model of proposed converter for a 2 kW OBC is set up and system simulation is implemented to demonstrate the feasibility and effectiveness of proposed integrated solution of PFC AC/DC converter integrated with power decoupling circuit.

Key word：
PFC AC/DC converter

double-frequency pulsating power

active power decoupling

model-free nonlinear power control

View(10202)

Design of interleaved APFC convert based on SOPC

DOI：10.16157/j.issn.0258-7998.2017.07.034

Author：Yan Changguo1，Gong Renxi2，Liu Xiaoyong1

Author Affilications：1.School of Engineering and Technology，Zunyi Normal College，Zunyi 563006，China； 2.School of Electrical Engineering，Guangxi University，Nanning 530004，China

Abstract：Aiming at the problem of the most controllers(such as MCU and DSP) of the interleaved Active Power Factor Correction(APFC) convert have been the serial structure,which are of slow operation speed and poor dynamical characteristics, an interleaved APFC convert architecture based on SOPC is proposed in this paper. It improved the overall performance of system, because the running speed of the parallel structure FPGA platform with NiosⅡsoft core processor as the core. The IP core of each module of this architecture were designed and the overall SOPC system of interleaved APFC convert was constructed in this paper. Experimental results of 800 W prototype show that this method has good power factor correction effect, good peak current limiting and fast dynamic response.

Key word：
serial structure

interleaved APFC

SOPC

parallel structure

View(10054)

Design and study on highly stabilized magnet current measurement system

DOI：10.16157/j.issn.0258-7998.2017.07.036

Author：Song Minhui1，Fei Wei1，2，Liu Xiaoning2

Author Affilications：1.University of Science and Technology of China，Hefei 230026，China； 2.High Magnetic Field Laboratory of the Chinese Academy of Sciences，Hefei 230031，China

Abstract：40 T hybrid-magnet superconducting outsert requires a highly stabilized power supply whose DC ripple current request limits in ±5 ppm of 16 kA. The control method used is based on a digital regulation loop, so the measurement of the magnet current becomes the limiting factor for highly stability. And, the resolution of analog measurement system must better than 10 μV. For the design of such Highly Stabilized magnet current Measurement System, this paper first analyzes the impact of system noise and temperature characteristic. Then, the actual circuit is given. Finally, the experimental results show that this measurement circuit meets requirements.

Key word：
high stabilized measurement system

system noise

temperature drift

ADS1281

View(6190)

Battery condition monitoring and intelligent control system based on μC/OS-II

DOI：10.16157/j.issn.0258-7998.2017.07.037

Author：Tang Jianqiang，Zhou Fengxing，Shen Chunpeng

Author Affilications：School of Information Science and Engineering，Wuhan University of Science and Technology，Wuhan 430081，China

Abstract：In this paper, a system, which is used to monitor the battery condition and achieve the intelligent control, based on μC/OS-II was designed to response to the battery failure in advance in the 12 V car battery power supply system will be introduced. This system combines the flyback switching power supply technology, μC/OS-II multi-task management, digital PI controller and PWM technology to achieve a unified management of battery charging and discharging process and effectively avoid the battery charging less, over-charging or over-discharging. In addition, a method in the least squares was proposed, which fits the partial discharge curve as well as assesses the battery performance and remaining life by obtaining the first-order coefficient. Experiments show that the system has a good real-time performance and reliable operation. It provides a good solution for maintenance and management of the battery.

Key word：
intelligent control and monitoring

flyback switching power supply

multi-task management

multi-stage charging policy

life evaluation and forecast

View(8698)

A novel interleaved buck converter

DOI：10.16157/j.issn.0258-7998.2017.07.038

Author：Chen Xiandong1，Cao Taiqiang1，2，Li Fansen1

Author Affilications：1.School of Electric Information，Xihua University，Chengdu 610039，China； 2.Key Laboratory of Fluid and Power Machinery(Xihua University)，Ministry of Education，Chengdu 610039，China

Abstract：Based on the three-teminal network of traditional buck converter ,the high step-up buck converter is proposed in this paper. The operation principle and property of the converter are analyzed in detail.Through theoretical analysis of the new converter, when the duty D<0.5,the ripple of the output is reduced, and the voltage gain is higher in the same duty while compared with the traditional buck converter.At the same time, the voltage stress of the switches are reduced, which current stress is half of the output current, it is conducive to the selection of the devices and the heat sinks.Therefore, the new converter is very suitable for the low voltage and high current conditions and the system which has a large input and output.Finally, the simulation is built to verify the theoretical analysis.

2017 No. 07

Publish Date：2017-07-06

ISSN：0258-7998

CN：11-2305/TN

Special Column-RF and Microwave

Key word： radio frequency and microwave security application human security unmanned aerial vehicle capture millimeter-wave radar View(16306)

Key word： 2～6 GHz output power PAE View(17920)

Key word： divisive growing type fractal structure fractal antenna mobile communication system RFID system remote identification and payment View(9450)

Key word： 9.4T radiofrequency coil birdcage coil tuning signal to noise ratio(SNR) View(29322)

Key word： millimeter-wave passive imaging complex correlation analog complex correlator View(9964)

Review and Comment

Key word： the fifth-generation mobile communications massive MIMO channel estimation precoding signal detection View(86064)

Microelectronic Technology

Key word： security chip active shield FIB invasive attack View(14036)

Key word： current reusing low power quadrature signal View(14114)

Key word： CMOS image sensor FPGA data correction high resolution View(11442)

Key word： dual frequency RFID transponder state detect power management View(15444)

Key word： Balun LTCC miniaturization three-dimensional integration View(16356)

Key word： SiP-system in package bond wire cavity chip stack SiP simulation View(17550)

Embedded Technology

Key word： radar processor DSP View(10742)

Key word： USB driver component K64 enumeration View(6520)

Key word： System Generator modular modeling control algorithm export View(10294)

Key word： antenna array PCIE bus AD acquisition consecutive storage View(9246)

Key word： frequency modulated continuous wave radar weak target surveillance View(12224)

Measurement Control Technology and Instruments

Key word： GNSS satellite signal simulator FPGA multi-board clock domain crossing source synchronous View(14518)

Key word： cloud liquid water sensor computational fluid dynamics PID algorithm View(8788)

Key word： high-speed GJB289A bus simulation system View(8900)

Key word： dielectrophoresis(DEP) microfluidics biochip control system cell capture View(9026)

Key word： deep learning UVA visual sensor network feature extraction View(27010)

Key word： immunochromatographic data acquisition FPGA control View(16296)

Key word： coal industry smart mine data sharing View(7624)