基于ARM9的嵌入式系统研究及设计

为适应嵌入式技术在现代工业及电子等更多领域的广泛应用,通过对ARM9嵌入式微处理器芯片S3C2410的研究,设计出基于S3C2410核心板的嵌入式系统开发底板,更多的需求及功能可在其底板上进行扩展与实现.首先对ARM9嵌入式微处理器S3C2410进行介绍,然后给出了基于S3C2410核心板的嵌入式系统开发底板的设计与功能扩展,包括开发板总体设计,电源模块设计,各种通信模块设计如串口、JTAG接口、网络接口、CAN总线通信接口等.该模板的设计实现了嵌入式系统在更多更广泛领域应用的灵活性.     

基于ARM的嵌入式零树编码图像压缩的实现

基于RISC的ARM微处理器近年来发展迅速,并在工业控制、无线通信、网络应用等领域得到了广泛的应用。利用ARM微处理器实现图像的小波变换,并根据ARM本身的结构特点提出了一种改进的嵌入式零树编码算法,以便在ARM微处理器上实现图像压缩。实验证明,具有较好的有损压缩效果。该研究对基于硬件平台的算法优化设计具有指导作用。     

基于LPC2220低压无功补偿控制器设计

本文设计了一种基于ARM7TDMI-S处理器LPC2220为主控制MCU,以复合开关为电容投切开关的压无功补偿控制器.该控制器能够实现自动采样计算、无功自动调节、故障报警保护、数据存储等功能.并具有LCD液晶菜单显示,直观地显示测量基本电网参数.软伟设计采用基于嵌入式实时操作系统μC/OS-Ⅱ.并且可通过上位机进行实时电网参数、电容投切情况、及历史数据的远程查询.     

基于ARM微处理器的嵌入式以太网接口

介绍了一种具有较高性价比和发展前景的基于ARM微处理器的嵌入式以太网的设计方案.首先介绍了ARM内核的微处理器S3C44BOX的功能和特点,接着分析了以太网控制器芯片RTL8019AS的性能,给出了以ARM为基础的嵌入式系统与10 Mbit/s常用以太网控制器芯片RTL8019AS的硬件接口电路.在软件设计上,首先介绍了μC/OSⅡ实时操作系统在S3C44BOX的移植,并在此基础上给出了以太网控制器芯片RTL8019AS的初始化程序,最终实现了嵌入式以太网的数据传输.     

基于LPC2220低压无功补偿控制器设计

本文设计了一种基于ARM7TDMI-S处理器LPC2220为主控制MCU,以复合开关为电容投切开关的压无功补偿控制器。该控制器能够实现自动采样计算、无功自动调节、故障报警保护、数据存储等功能。并具有LCD液晶菜单显示,直观地显示测量基本电网参数。软件设计采用基于嵌入式实时操作系统μC/OS-Ⅱ。并且可通过上位机进行实时电网参数、电容投切情况、及历史数据的远程查询。     

基于S3C2410型微处理器和UDA1341型立体声音频编解码器的嵌入式音频系统设计

S3C2410是Samsung公司一款基于ARM920T核的微处理器,通过IIS音频总线与UDA1341型CODEC构成一种嵌入式音频系统,实现音频的播放和采集.给出相关硬件电路的说明及Linux下音频驱动程序的设计要点.     

基于ARM智能点餐终端的设计与实现

本文提出了一种基于ARM9的嵌入式无线点菜系统,其中主要包括硬件以及软件的设计与实现,采用S3C2440 ARM9微处理器控制芯片,扩展FLASH,SDRAM,触摸屏等构成嵌入式平台。在这个平台之上,再搭建嵌入式开发环境,移植Linux操作系统及网卡驱动程序等,采用QTE图形界面,通过ZIGBEE无线网络实现终端与服务器端的信息交换。采用Linux和ARM9的嵌入式操作系统;其次,通过无线通信技术实现数据传输;最后将利用嵌入式数据库sqliet来进行数据存储。同时,该系统采用了开源的Linux操作系统,这样实现了降低运营成本,从而提高它的稳定性和可靠性,然后利用QTE的图形界面的设计实现更美感的嵌入式手持终端,使得在餐饮业有一定的商业使用价值。     

基于SEP3203微处理器的嵌入式系统实验平台设计

对ARM7和ARM9在嵌入式实验系统中的应用做了比较。阐明了嵌入式实验系统采用基于ARM7微处理器的优点,首次把基于ARM7TDMI的SEP3203微处理器应用于嵌入式实验系统的设计。本设计充分利用了SEP3203芯片丰富的管脚,采用模块化设计,提高了系统的稳定性,降低了系统的成本。本系统可适用于接口类、人机交互类、无线通讯类和操作系统类的实验。     

基于S3C2410的触摸屏应用技术

S3C2410处理器是Samsung公司基于ARM公司的ARM920T处理器核,是当前32位嵌入式市场中应用较多的微控制器,基于S3C2410嵌入式微处理器的触摸屏应用技术有较高的工程应用价值。介绍了S3C2410处理器的技术特点、触摸屏的工作原理,阐述了基于S3C2410系统的触摸屏接口设计方法和程序配置。     

基于嵌入式WinCE6.0的网络电视播放器研究

提出了一种基于WinCE6.0操作系统的网络电视播放器的设计方案,该方案采用基于ARM11的微处理器S3C6410作为硬件开发平台,在嵌入式WinCE6.0系统软件平台上,利用DirectShow技术设计出了在线播放流媒体文件的多媒体终端,可以通过TV接口将信号发送给电视进行播放,给出了系统硬件结构和软件开发的具体流程...     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks