Home > Archive > 2013 No. 06

2013 No. 06

Publish Date：2013-06-06
ISSN：0258-7998
CN：11-2305/TN
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Embedded Technology

Design of dental CT control system based on Nios II processor

Author：Luo Yibin，Zhou Linghong，Zhang Guangpeng

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

Abstract：The core chip of dental CT control system is designed using EP4CE15F256 of Cyclone IV series’ FPGA chip of Altera company,which is embedded processor Nios II. The synchronous signal output of the control system is realized using the processor and internal logic circuit. At the same time, some other functions including PC communication, power control, X-ray tube voltage and tube current monitoring，and input, display and storage of kinds of parameters are realized. This synchronous control system makes circuit design be more simple and software design be more flexible. It can effectively shorten development cycle, and reach the desired results.
Key word：
Nios II
dental CT
synchronous control
serial communication
View(8572)

Expansion design of LwIP in device monitoring

Author：Sun Dihua1，2，Lu Xu1，2，Liao Xiaoyong1，2，Zheng Linjiang2，3，Yu Chuzhong1

Author Affilications：1.College of Automation，Chongqing University，Chongqing 400044，China； 2.Key Laboratory of Dependable Service Computing in Cyber Physical Society of Ministry of Education， Chongqing University，Chongqing 400044，China； 3.College of Computer Science，Chongqing University，Chongqing 400044，China

Abstract：Aiming at problems of slow speed of data transmission, restricted transmission distance and difficulty to get monitoring device network state in remote device monitoring, this paper designs a new device monitoring scheme which is based on improved LwIP. This scheme realizes the function of the network by transplanting LwIP on ARM platform and μC/OS-Ⅱ system. In order to achieve the purpose of real-time monitoring on remote device, it completes monitoring and treatment of the ICMP message by improving ICMP support in LwIP. The experimental results prove the feasibility and practicability of the scheme.
Key word：
LwIP
device monitoring
STM32F207
ICMP
View(8076)

Design and implementation of TMS320C6455 DSP HPI dynamic program loading based on ARM

Author：Zhao Jianbo1，Hu Wenruo2，Xi Yong1，Chen Luhui1

Author Affilications：1.School of Electronic Science & Engineering, National University of Defense Technology, Changsha 410073，China； 2.School of Mathematics & Computer Science, Xinyu University，Xinyu 338004，China

Abstract：This article designs the communication interface between ARM and DSP HPI. The ARM processor can dynamically load the DSP program through this interface. This method reduces the requirements of external nonvolatile memory, and improves the flexibility of the DSP boot mode, which is also important for the loading of the software defined radio waveform components.
Key word：
ARM
DSP HPI
interface design
dynamic program loading
View(11786)

Deep-sea drilling closed-loop detection system based on STM32

Author：Liu Yanjun，Liu Jingbiao，Cai Wenyu

Author Affilications：Institution of Electronic Information，Hangzhou Dianzi University，Hangzhou 310018，China

Abstract：In view of the present open-loop control situation of deep-sea drilling system, closed-loop detection system for deep-sea drilling system is designed and implemented. The system mainly consists of a STM32F103VC6 board and external sensors，it is an important link in the implementation of closed-loop control of deep-sea drilling rig. Detection system uses the CAN communication protocol with the drill main control system, and serial communication protocol with the monitoring system on the deck.
Key word：
deep-sea drilling system
closed-loop control
STM32
CAN communication
View(5294)

Design and development of low power active RFID tag and RFID handheld reader

Author：Dai Xin，Deng Xiang，Liu Hao

Author Affilications：School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044，China

Abstract：In the paper, a short-distance of 2.4 GHz wireless communication scheme is proposed. Based on the scheme, the RFID handheld reader and low power RFID tag are successfully developed and also applied in the oilfield equipment. Identification and data transmission between RFID handheld reader and low-power RFID tag are achieved by wireless transceiver chips nRF24L01 which controlled by ARM core-based microcontroller and MSP430 series microcontroller, and the related parameters can be set by the software. Handheld reader has good man-machine interface, and the electronic tag has the characteristics of small volume, lower power consumption, stable performance, and strongly anti-interference capability. Within a certain distance, this scheme can achieve more rapid communication with low bit error rate.
Key word：
RFID
electronic tag
low-power
handheld reader
oil field equipment
View(7024)

Design of a multi-frequency-one-time signal acquisition system based on Walsh function

Author：Zhao Jinchuang，Li Xianyu，Qiu Bin，Fu Wenli

Author Affilications：College of Computer and Electronics Information，Guangxi University，Nanning 530004，China

Abstract：To acquire the impedance of different tissues and organs at the same time in different frequency, this paper designs a multi-frequency-one-time(MFOT) signal data acquisition system base on of Walsh function. In the design, AD9240 is selected as sampling ship, Cyclone IV EP4CE115F29C7N FPGA is used to constructe FIFO as sampling data buffer. The data in the FIFO is transferred to the computer through the serial port to realize waveform recovery. Experimental results show that the data acquisition system can acquire the multi-frequency-mixed signal correctly.
Key word：
Walsh function
multi-frequency-one-time
FPGA
View(7600)

Parallel implementation of processing algorithm of ultrasound imaging based on multi-core DSP

Author：Xiao Liang，Zhang Xuejian

Author Affilications：College of Information Science and Technology，Beijing University of Chemical Technology，Beijing 100029，China

Abstract：The parallel design and programming of Mid-End processing algorithm of B-mode ultrasound imaging based on TI’s multi-core DSP-TMS320C6678 is discussed in this article. The paper introduces key technologies used in the multi-core DSP programming for the algorithm, including task parallelism and the 3rd generation EDMA3(Enhanced Direct Memory Access). Particularly, the IPC(Inter-Processor-Communication) technique is analyzed in detail. The algorithm, according to its characteristics, is divided into several components using task planning, and is assigned to 3 cores to be executed separately in view of Data-Flow model. The IPC is accomplished by utilizing MessageQ scheme. The effectiveness of MessageQ scheme to accomplish IPC and task parallelism is validated through experiments.
Key word：
ultrasound imaging
multi-core DSP
IPC
MessageQ
EDMA3
View(9960)

Application of Integrated Circuits

Design of the interface between DSP and audio CODEC based on SPI

Author：Zhang Wei1，2，Liu Yu2，Xue Zhiyuan1，2，Zhang Tiejun2，Wang Donghui2

Author Affilications：1.University of Chinese Academy of Sciences，Beijing 100049，China； 2.Institute of Acoustics，Chinese Academy of Sciences，Beijing 100190，China

Abstract：In audio signal processing system, interface design is critical to the implementation of the communication because the data format and speed don’t match between the DSP and CODEC. To solve this problem, this paper presents an interface design method based on SPI bus, and gives the main part of the interface. This method has implemented in FPGA, and applied to the audio processing system based on the SuperV DSP processor.
Key word：
SPI
audio CODEC
interface
SuperV processor
View(11406)

Multifunctional bioelectrical signal detecting system based on FPGA

Author：Wang Ming1，Li Zaijun1，Zhong Wei1，Yi Fan1，Chang Sheng1，Huang Qijun1，Wang Hao2

Author Affilications：1.School of Physics and Technology, Wuhan University, Wuhan 430072，China； 2.Institute of Microelectronics and Information Technology,Wuhan University, Wuhan 430072，China

Abstract：A mutifunctional bioelectrical signal detecting system based on FPGA is presented in this paper. By altering the preprocessing box, it can detect and analyse the neural EMG signal, ECG signal and sEMG signal. By the way of integrating analog circuits with digital circuits, and cooperating hardware circuits with Nios II embedded software, this system realizes bioelectrical signal′s collection, processing, storage, display and analysis.
Key word：
bioelectrical signal
SoPC
FPGA
View(8600)

Design of a RGC input pre-amplifier with AGC

Author：Hou Yongqi，Yang Jianhong

Author Affilications：Institute of Microelectronics，Lanzhou University，Lanzhou 730000，China

Abstract：This paper designs an RGC input pre-amplifier with AGC function of optical receiver based on 0.18 μm CMOS technology. The structure of circuits is the voltage parallel negative feedback. Its input stage is an RGC structure to expand bandwidth，which solves contradiction between wide bandwidth and high trans-impedance. The output stage is a single-to-differential structure. And in order to solve the contradiction between the dynamic range and high trans-impedance or low noise，the AGC circuit is used. Finally，the SIMC 0.18 μm technology library is selected to simulate. The results show that this circuit structure has good frequency characteristics and the equivalent current input curve，when input optical power of optical receiver is -10 dBm, the power supply voltage is 1.8 V, and the parasitic capacitance CD of the optical detector is 0.5 pF.
Key word：
optical receiver
pre-amplifier
CMOS technology
RGC
AGC
View(12638)

Design of an X-band low noise amplifier with a novel bias circuit

Author：Lu Hongshu，Zhang Xiaofa，Yuan Naichang

Author Affilications：School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073，China

Abstract：Aiming at the temperature and other factors will change the quiescent operating point of the transistor, and then affect the performance of the amplifier, this paper introduces a DC bias feedback control technology to design an X-band low noise amplifier(LNA). In order to accelerate the design process of the LNA, this paper also adopts a method of combining available power gain circles with noise figure circles to design LNA. Finally, the practical test and debugging demonstrate that this LNA has reached the scheduled technical requirements and works well. The operating frequency range is 10.2 GHz～10.8 GHz, the noise figure is less than 2 dB, the power gain is 34.5 dB and the S parameter S11 is better than -10 dB.
Key word：
temperature
DC bias feedback control technology
LNA
noise figure
power gain
View(7602)

A software PLL-based 3D glasses anti-infrared interference technology

Author：Jiang Wei，Cai Lei

Author Affilications：Research and Development Department,Sichuan CCO Display Technology Co.，Ltd.，Chengdu 611731，China

Abstract：This paper introduces the principle and implementation of a software PLL-based anti-infrared interference technology. The method is based on the basic principle of the PLL, utilizing the correspondence relationship between the 3D TV synchronizing signal and the synchronizing signal of the 3D glasses, by accurately calculating the synchronization error between the two synchronization signals and dynamically compensating the synchronization error in the synchronizing signal of the 3D glasses, in order to achieve accurate phase locking and anti-infrared interference. The method replaces the complex integral parts of traditional software phase-locked loop. As it is simple and effective, and the results on the application of shutter 3D glasses products show that the software PLL has good signal acquisition and tracking performance.
Key word：
shutter 3D glasses
software PLL
opening cycle
phase compensation
View(5738)

Design and Implementation of an auto-squelch circuit in transimpedance amplifier

Author：Zhang Shulei，Mo Taishan，Ye Tianchun

Author Affilications：Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029，China

Abstract：A novel auto-squelch circuit in transimpedance amplifier for optical fiber communication was designed and realized in a standard 0.35 μm CMOS technology. The system architecture described in this paper is composed of a received signal strength detector, a comparing reference generator, a hysteresis comparator and a squelch control cell. When input current signal is below the squelch assert level, the squelch circuit will disable the data path automatically. Otherwise, when input current signal is above the squelch de-assert level, the squelch circuit will open the data path. The squelch circuit was implemented in 155 Mb/s transimpedance amplifier with -40 dBm sensitivity(BER=10-10). The squelch assert and de-assert level are 47 nA and 85 nA respectively. And the squelch hysteresis width is 2.57 dB.
Key word：
auto-squelch
TIA
RSSI
hysteresis comparator
View(9928)

Design of the location system of double acoustic sensors based on FPGA

Author：Li Wenpeng1，Chen Hejuan1，Zhang Ying1，2，Qu Wei1

Author Affilications：1.School of Mechanical Engineering，NUST，Nanjing 210094，China； 2.Department of Physics and Information Engineering, Jining University,Qufu 273155，China

Abstract：Aiming at the demand on the number of array elements by acoustic detection system, the location system of double acoustic sensors based on FPGA was designed. The location system utilized the sound pressure and time delay value of echo received by double acoustic sensors to joint position, that achieved the purpose of reducing the number of array elements. Meanwhile，the system was designed by hardware description language and DSP Builder. The simulation and the experiment indicate that the location system operating frequency can reach 94.4 MHz，and it only requires 52 μs to complete a positioning with error less than 1%.
Key word：
FPGA
location system
acoustic detection
double acoustic sensors
View(13794)

Power Supply Technology and Its Application

Research on active power filter for AC side of superconducting magnet power supply

Author：Chen Siming，Liu Xiaoning

Author Affilications：High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031，China

Abstract：In order to realize harmonic elimination and reactive power compensation on the AC-side of the power supply of superconducting magnet model coil, active power filter(APF) is applied to this system. The structure and working principle of the APF are described. The FBD method is used to simplify harmonic computational task, which is better than ip-iq method in term of calculation. At the same time, the controlling method of space vector pulse width modulation(SVPWM) is adopted, which can greatly reduce switching frequency. Thus, the power devices' on/off switching loss of can be reduced efficiently. The simulation experiment shows that the APF performs satisfactorily.
Key word：
APF
FBD method
SVPWM
harmonic detecting
View(5148)

The study of underwater wireless power transmission device based on robot fish

Author：Huo Zhaojing,Fan Shaosheng

Author Affilications：Changsha University of Science and Technology，Changsha 410004，China

Abstract：The structure of the wireless power supply system of robot fish is studied based on its working environment. In this paper, the total structure of the wireless power system is analysed, and the coil value calculation of the underwater wireless power supply system are mainly discussed by related theory, then the influence water environment brings to underwater wireless power supply system is considered. Finally, experiments are carried on to test the underwater wireless power system: when the distance of two coil changes, the output power and voltage of wireless power supply system can still be able to meet the requirement of load and make the transmission efficiency reach maximum value.
Key word：
wireless power transmission
resonance
variable distance
robot fish
View(9508)

Research on induction motor fault-tolerant control based on matrix converter

Author：Wei Ping1，2，Wang Jinlong1，2，Tian Bin1，2

Author Affilications：1.Department of Information Engineering，Nanchang University，Nanchang 330031，China； 2.Jangxi Key Laboratory of Power Transmission and Power Conversion control，Nanchang 330031，China

Abstract：Matrix converter with input and output characteristics, low power harmonics, small size and excellent characteristics. But scholars have found that the matrix converter in reality can not be stable and reliable running, thus different control strategy are proposed to improve the stability of its run. In this paper, a fault-tolerant matrix converter controls method is proposed, so that it remains stable operation in the case of damaged normal, and the input and output of the matrix converter harmonic analysis. Through the analysis of the matrix converter input and output characteristics of the simulation results prove that the matrix converter can be stabled correctness and feasibility.
Key word：
matrix converter
fault-tolerant
harmonics analysis
Simulink simulation
View(13442)

Speed sensorless method for PMSM based on passivity control

Author：Hou Jian，Mao Jun

Author Affilications：School of Mechanical Engineering, Liaoning Technical University，Fuxin 123000，China

Abstract：Based on the energy-shaping and the interconnection and damping assignment passivity-based control method, the model and speed controller of the port-controlled Hamiltonian(PCH) control system for the surface permanent magnet synchronous motor(SPMSM) is designed. The equilibrium stability of the system is proved. In view of the speed estimation problem of PMSM, a novel speed sensorless method was put forward by combining the fluctuating high frequency voltage signal injection method and adaptive sliding mode observer method. The speed-switcher is designed to realize smooth switching between the two methods. The strategy solves the problem that the single method can not give satisfactory balance between static and dynamic performance, moreover cost is effectively reduced and system’s reliability is enhanced. The simulation results show that the system has a satisfactory performance.
Key word：
PMSM
passivity-based control
fluctuating high frequency voltage signal
adaptive sliding mode observer
View(13058)

Measurement Control Technology and Instruments

Design of non-invasive blood oxygen measurement system based on S3C2440A

Author：Zhang Qiang, Xin Shangzhi, Xing Bin

Author Affilications：School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China

Abstract：A non-invasive measuring system based on S3C2440A is designed for dynamic measurement of blood oxygen saturation.S3C2440A as contral core of the system,analyzed and processed the signal of blood oxygen saturation ,sent the result to upper computer throught the serial. Oxygen saturation of blood sensor is designed based on the principle of non-invasive oxygen saturation of blood detection of near-infrared spectroscopy.According to the characteristic of the high impedance of the sensor,the driver circuit,the oximetry signal conditioning circuit and high-precision signal conversion circuit were designed. The system is non-invasive detection of blood oxygen saturation signal rapidity,reliability and high accuracy.
Key word：
blood oxygen saturation
S3C2440A
near-infrared spectroscopy
signal conditioning circuit
View(7914)

FPGA implementation of a remote digital image monitoring system

Author：Ma Lingling, Liu Yunfei, Gu Minming, Zhou Yang

Author Affilications：College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China

Abstract：By combing the CMOS image sensor technology, wireless transmission technology and color image processing technology, a remote image monitoring system in which the Field Programmable Gate Array(FPGA) is used as the CPU is designed with the functions of image acquisition, pretreatment compression and transmission. Using verilog hardware description language to configure the digital camera development kit D5M and GPRS data transmission module based on serial port, the color image wavelet compression is realized and the image remote monitoring system is eventually complete.
Key word：
FPGA
D5M
color images
wavelet compression
GPRS
View(17602)

Research of data acquisition system based on electrical throttle assembly line

Author：Huang Yawen, Chen Zailiang, Yang Xiaomin

Author Affilications：School of Mechanical and Electrical Engineering of Soochow University, Suzhou 215006, China

Abstract：Through analysis of station function，equipment composing and the data acquisition problems encountered in electrical throttle assembly line, this paper develops a distributed data acquisition system. For assembly production data, this paper proposes an acquisition method based on XML protocol, MSCOMM component and I7000 series model. Press unit is used as example for machine data acquisition research. The force and displacement acquisition solution of the running press unit is designed, and a new software solution is proposed to optimize the traditional solution. The system can gather data automatically, response producing abnormity quickly and record information effectively.
Key word：
electrical throttle
assembly line
data acquisition
View(5576)

Research on road test technology of automobile braking ability based on MEMS

Author：Cai Junyu, Liu Jun, Shi Xiaopeng

Author Affilications：School of Vehicle and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China

Abstract：To test and rate automobile braking ability rapidly, correctly with low cost, a road test system of automobile braking ability is constituted in LabVIEW based on MEMS after the deeply analysis of rating principle and national standard of it. Then the real car test is accomplished using this test system and the test result has been analyzed which prove the strategy of system building is feasible and has widespread application value and prospect in engineering.
Key word：
vehicle
MEMS
braking ability
LabVIEW
test
View(6352)

Influencing factor analysis of optical-fiber current sensing system

Author：Lu Huaimin1, Cai Lihua2, Fang Haifeng2, Liu Zhao3

Author Affilications：1. Mechanical and Electronic Engineering Department, Shazhou Professional Institute of Technology，Zhangjiagang 215600, China; 2. Mechatronics & Automotive Engineering School, Jiangsu University of Science & Technology, Zhangjiagang 215600, China; 3. School of Mechanical Engineering, Tongji University, Shanghai 201800, China

Abstract：The sensing characteristic of optical-fiber current sensor is researched. Various error of affecting accuracy of system measurement is analyzed, such as transmitting axis angle error of polarization beam splitter, inherent circle birefringence error and linear birefringence error. Then, integrated theoretical model of double-solenoid optical-fiber current system is established making use of Jones matrix based on Faraday effect, the error source of which is studied by similation research on accuracy of sensing system measuring. It can be found that the sensing system error caused by inherent circle birefringence error is smallest and the second is the transmitting axis angle error of polarization beam splitter, with the best notable measured error brought by linear birefringence error. This dissertation adopts the low birefringent optical-fiber to reduce effectively the linear birefringence caused by optical-fiber bent.
Key word：
optical-fiber current sensor
error
linear birefringence
low birefringent
View(4724)

Signal detection and analysis of vehicle wheel speed sensor

Author：Guo Fengyu1,2, Zhang Lei1,2

Author Affilications：1. Institute of Information and Electrical, China University of Mining and Technology, Xuzhou 221008, China; 2. Institute of Electronic Engineering, Huaihai Institute of Technology, Lianyungang 222005, China

Abstract：Aiming at the disadvantages of low detection efficiency and single detection model, design a detection and analysis system of 16-channel wheel speed sensor based on LabVIEW. The main function of the system is analysis and measurement of the signal of multi-model type of wheel speed sensor. Then determine the quality of the sensor. The system includes motion control platform, data and waveform storage and playback function. It can effectively achieve the sensor measurements and improve the efficiency of the test. Meanwhile,enhance the versatility and scalability of the system.
Key word：
wheel speed sensor
LabVIEW
signal detection
multi-channel
View(19568)

The research of comprehensive performance evaluation system of electronic sphygmomanometer based on STC12C5A

Author：Li Xuezhe， Huang Chengyu， Zhang Quanzhu， Deng Yonghong

Author Affilications：Institute of Information and Control Technology, North China Institute of Science and Technology, Sanhe 065201, China

Abstract：A multifunctional and high precision implementation scheme of electronic sphygmomanometer performance evaluation system is proposed in the paper, which has functions of static pressure test, pressure characteristic curve test, power test etc. The hardware of system is designed by STC12C5A single-chip, pressure sensor of E8CC and AD626 instrumentation amplifier, the software uses linear interpolation algorithm, realize high precision test of the pressure and current. The system can implement PC SPC output through RS232 communication interface. Experiments show that the system has advantages of multifunctional, high precision, low cost, and flexible operation etc.
Key word：
electronic sphygmomanometer
performance evaluation
static pressure
linear interpolation
STC12C5A
View(6786)

Communication and Network

QRD-M based multi-antenna grouping parallel algorithm for signal detection

Author：Jiang Panpan1, Dou Dongdong2, Zhu Shilei1, Wang Daming1

Author Affilications：1. Institute of Information System Engineering, Information Engineering University, Zhengzhou 450002, China； 2. Bengbu Automobile Academy School，Bengbu 233000，China

Abstract：A QRD-M based multi-antenna grouping parallel algorithm for signal detection is proposed for MIMO communication systems in this paper. This method avoids solving the pseudo inverse of the channel matrix and overcomes the problem that the traditional QRD-M algorithm cannot achieve the tradeoff between system performance and complexity as increased number of transceiver antennas. Through grouping the transmit antennas and adopting the improved QRD-M algorithm in every group parallel which can flexibly select the reserved branches of each layer, the proposed algorithm can improve system performance and also avoid too high complexity. Simulation results manifest that the proposed algorithm can provide a more flexible tradeoff between system performance and the complexity and obtain better BER performance at similar complexity compared with the traditional algorithm.
Key word：
MIMO
multi-antenna grouping
QRD-M detection
View(5344)

Research and implementation of parallel TCP in acceleration system for WAN

Author：Gao Ya1, Guo Zhenhua2

Author Affilications：1. Luoyang Normal College， Luoyang 471022，China; 2. College of Information Science & Engineering, Central South University, Changsha 410083, China

Abstract：With the development of applications, current Internet has a challenge. In the paper, parallel TCP is proposed to address this problem in current network hierarchy. An acceleration gateway system is designed and implemented for WAN application in double-end acceleration mode. This system has the functions of access control of session, interception, processing and transmission of application data and flow control of session. Finally, the results of the tests indicate that this system reduces internet response time and improves transmission performance.
Key word：
WAN acceleration
parallel TCP
gateway design
View(5250)

Enhanced TCP Vegas congestion avoidance mechanism

Author：Cao Xin, Dong Wei, Tan Yiqiu, Ni Changbao

Author Affilications：Dalian Neusoft Institue of Information, Computer Science and Technical Department, Dalian 116023, China

Abstract：TCP Vegas’performance is better than the traditional TCP protocol in many ways．However，studies have shown that TCP Vegas has some defects in its congestion avoidance mechanism．They include that TCP Vegas has a poor performance when it competes with TCP Reno and it is not fair to the previous connections．To solve these problems，the authors proposed an improved congestion avoidance algorithm called TCP Vegas-N．The algorithm did not depend on the other factors and hence could be implemented solely at the end host．The experimental results show that the improved algorithm can get better performance in the wired network and it is a good solution to the problems of the Vegas．
Key word：
congestion control
TCP Vegas
round trip time
fairness
NS2
View(5994)

Network mobility optimization solution based on extending signaling in proxy mobile IPv6 domain

Author：Tang Wei， Tang Hongbo， Wang Lingwei

Author Affilications：National Digital Switching System Engineering & Technological R & D Center, Zhengzhou 450002, China

Abstract：In order to resolve the problem of huge total cost caused by supporting NEtwork MObility(NEMO) in Proxy Mobile IPv6 domain, a NEMO optimization solution based on extending signaling is proposed. With the help of extending signaling message, the integration between location update and forwarding packets, this solution evenly reduce the location update overhead and packet tunneling overhead. Analysis and simulation show that, the solution can reduce tocal cost.
Key word：
PMIPv6
NEMO
extending signaling
location update
tunneling overhead
View(5552)

Research of intelligent broadband wireless radio network technology

Author：Xie Wenfeng1,2， Song Ke1,2， Chen Dianjun1,2

Author Affilications：1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2. Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, Shijiazhuang 050081, China

Abstract：This paper conducts an in-depth study of intelligent broadband wireless radio network technology, which includes several key techniques of the intelligent broadband wireless radio network, such as network topology structure, protocol architecture, study of MAC protocol, designing router protocol, etc. Then verify the performance of wireless radio network with NS2 simulation software, analysis the throughput, packet loss rate and time delay of the network. The text realized the radio network effectively.
Key word：
wireless radio
network
network topology
NS2 software
View(8034)

CCE resource allocation based on reported CQI for TD-LTE system

Author：Li Xiaowen, Luo Jia

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

Abstract：In order to improve the success ratio of UE blind detection, throughput and the CCE(Control Channel Element) resources utilization for TD-LTE system, one modified method which is based on reported CQI(Channel Quality Indicator) by UE to make selection of CCE aggregation is proposed. Its implementation complexity is very low. The article theoretically analyzed in detail the principles and performance of the algorithm. The simulation results verify the feasibility and effectiveness of this modified method, the system performance is improved as well.
Key word：
TD-LTE
CCE
CQI
throughput
aggregation level
blind detection
View(9410)

ZigBee sensor networks QoS routing algorithm based on ant colony optimization

Author：Li Xue1, Cao Fengmei1, Guo Jie2, Mu Yingliang2

Author Affilications：1. Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081,China; 2. Beijing Liyun Technology Development Company, Beijing 100091,China

Abstract：As a kind of wireless multimedia sensor networks(WMSNs), ZigBee has the requirement of quality of service(QoS). Here an improved QoS routing algorithm based on ant colony optimization is proposed. This is a new approach to extend the lifetime. How to find the route of optimal or comparatively optimal QoS with the proposed algorithm is presented. Last but not least, simulation of the routing algorithm realizes the idea. And by comparison with the classical algorithm, we can find that the improved algorithm witch can not only fill usual QoS requirements but also efficiently prolong the network lifetime is more suitable for ZigBee.
Key word：
ZigBee
wireless multimedia sensor networks
ant colony optimization
QoS routing
network life
View(14190)

Computer Technology and Its Applications

The design of data acquisiton system based on FT245BM and FPGA

Author：Mei Wenlong, Wang Hui

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

Abstract：A high speed data acquisition system based on FT245BM chip and FPGA is designed in this paper. This system completes functions of data acquisition and data transmission by using MCU and FPGA as the master controller. MCU receives packaged commands sent through the serial port to PC. Controlled by the master controller, the AD collects signal, then the data stream is formed in the FPGA. At last the data is transferred to the PC via the USB bus and then stored. USB communication is simply designed in this system. The efficiency of software development is improved and hardware resources is saved. After testing by PC software, we can see that data collected by PC is broadly consistent with the trend of the original input data, and the system meets the design requirements.
Key word：
FPGA
USB
MCU
data acquisiton
FT245BM
View(7276)

The design and co-simulation of audio asynchronous sample rate conversion IP

Author：Li Linlin, Qin Min

Author Affilications：1. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China; 2. Department of Electrical and Information Engineering, Sichuan Engineering Technical College, Deyang 618000, China

Abstract：Taken the improved Farrow structure filter as its center, the IP Core for audio asynchronous sample rate conversion was designed and emulated by co-simulation platform. The platform consisted of Simulink and ModelSim, and they worked as server and client respectively. The result shows that, the IP can meet the require of the design, and the co-simulation method is of high-efficient and feasible.
Key word：
Farrow structure filter
co-simulation
sampling rate conversion filter
View(7070)

The processing platform for radar video based on the high performance DSP

Author：Qu Wei

Author Affilications：Jiangsu Automation Research Institute of CSIC, Lianyungang 222061,China

Abstract：Based on the newly high performance FPGA and DSP, merging the relative digital image processing theories, an acquiring, compressing and transmission platform of radar raw video is proposed. The key video image compressing arithmetic is researched. By the practical validation. The platform can provide base for further research based on object detection, character extraction and pattern recognition, the method has a wide application prospects in command and firing system.
Key word：
radar
DSP
FPGA
View(9340)

FPGA-based facial drive system of humanoid robot

Author：Xiao Zhifeng, Duan Yuqin, Cai Yong, Jiang Gang

Author Affilications：School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Abstract：SCM exist delay defect in the treatment of multi-tasking incident. This paper proposed the design scheme of the drive system based on field programmable gate array(FPGA). According to the feature of FPGAs′ multi-tasking parallel processing, designed verification respectively. It was simplified the hardware structure by unified instantiated modules in an FPGA. Compared with expression experiments show that, it was concluded that the driving system based on FPGA can effectively improve facial expression control accuracy and expression reproduction rate.
Key word：
FPGA
humanoid robot
facial expression
drive system
View(16742)

Medical image auto-adaptive enhancement algorithm based on artificial fish school algorithm

Author：Du Xiaoxin， Zhang Jianfei

Author Affilications：College of Computer and Control Engineering, Qiqihar University, Qiqihar 161006,China

Abstract：A method of multi-scale pyramid decomposition and reconstruction is put forwaard. A medical DR image atuo-adaptive enhancement algorithm based on artificial fish school algorithm, multi-scale pyramid decomposition and reconstruction is designed. Adaptive of image enhancement is realized. The high frequency enhancement method of decomposition and the low frequency enhancement method of decomposition are given. Eye vision system is given to image enhancement method. Simulation experiment on this method shows that resolution and contrast of image are enhanced, details of image is abundant and clear.
Key word：
artificial fish school algorithm
multi-scale pyramid decomposition and reconstruction
DR image
auto-adaptive enhancement
View(7168)

Design and implementation of OBS-oriented navigation and positioning for real-time communication module

Author：Yuan Guobin, Pei Chengyan, Shang Jian′ga, Wang Chao

Author Affilications：Faculty of Information Engineering, China University of Geosciences, Wuhan 430074, China

Abstract：To ensure reliable data transfer of the OBS navigation and positioning system, Communication module is designed by integrating serial communication and TCP/IP communication in real-time data acquisition and a variety of equipment, the integration organization and management of multiple, heterogeneous navigation and positioning data can provide more safety date services for business flow and other function modules of the OBS navigation and positioning system.
Key word：
OBS
navigation and positioning
serial port communication
TCP/IP
multi-device
View(8014)

System design and obstacle avoidance algorithm research of vacuum cleaning robot

Author：Pan Yonghui1,2

Author Affilications：1. Jiangsu Engineering R&D Center for Information Fusion Software, Wuxi 214405, China; 2. Jiangyin Polytechnic College, Wuxi 214405, China

Abstract：Designing multi-sensor hardware system based on Cortex-M0 controller, detecting the surrounding of vacuum cleaning robot by sensor combination of ultrasonic, infrared, collision, etc., we proposed an information fusion algorithm based on fuzzy neural network to process the multi-sensor data. And the output result of fuzzy neural network is used to control the localization and obstacle avoidance of vacuum cleaning robot. The experimental results demonstrate that the multi-sensor hardware system and obstacle avoidance algorithm based on fuzzy neural network proposed in this paper can improve the localization and obstacle avodance accuracy of vacuum cleaning robot highly, which is robust for different working environment of vacuum cleaning robot.
Key word：
vacuum cleaning robot
system design
fuzzy neural network
obstacle avoidance algorithm
View(13610)

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