基于AXI4-Stream总线的数字视频接口IP核设计

针对数字视频IP核间高速流数据传输,设计并实现了一种基于AXI4-Stream总线的数字视频接口IP核,对外部输入ITU601格式的数字视频信号,将其格式转化为符合AXI4-Stream总线协议的信号,并通过IP核的主端口输出到下一级IP核的从端口。采用Xilinx ISE Design Suite 14.6软件综合设计实现,结合ISE自带ISim软件完成功能仿真,通过实际硬件电路验证了设计的正确性及可行性。     

基于FPGA的RTL级USB2.0协议层设计与实现

文中重点阐述了用VerilogHDL语言对USB2.0协议层关键模块的RTL级设计和验证工作,并在XILINX ISE软件平台上进行了FPGA综合。通过在ModelSim6.1上仿真和ISE7.1上综合,结果表明本文设计的USB协议层模块是正确的。     

USB接口引擎的软核设计与FPGA兑现

在USB Open Core的基础上,对USB接口引擎进行RTL级的Verilog HDL语言功能设计和FPGA兑现验证。主要介绍了USB通讯协议的基本原理,根据USB接口引擎的结构框图,说明各功能模块的设计思路和方法,并在ModelSim中进行功能仿真分析,最后下载到Xilinx公司的FPGA中进行综合。     

UART微控制器设计方法及其FPGA实现

为满足FPGA与PC之间的通信需求,提出了一种FPGA的通用异步收发器设计实现方法。在Xilinx ISE 11开发平台上采用Verilog HDL硬件描述语言及其自带的IP CORE,实现了UART精确波特率时钟模块、UART发送模块和UART接收模块。并在ISE环境下进行综合建模仿真,给出各模块的仿真时序图以及综合生成的RTL图。实验通过Xilinx公司的XC2VP30 FPGA开发板对程序进行下载运行调试,与PC进行实时通信,结果表明,UART控制器工作稳定可靠,较好地实现了数据串行通信,达到预期设计要求。     

可配置总线接口USB控制器IP核的设计与实现

设计并实现了USB1．1器件IP软核、固核和硬核。详细介绍了USB IP软核的设计和验证技术以及基于0．18μm标准单元的固核与硬核的实现方法。为了提高USB IP的可重用性，引入了总线适配器和可配置总线接口IP核的概念，设计了三种总线适配器。对USB IP核的可配置端点数及基于FPGA的三种总线适配器进行了性能分析和评价。     

USB设备接口IP核的设计

讨论了用Verilog硬件描述语言来实现USB设备接口IP核的方法，并进行了FPGA的验证。简要介绍USB系统的体系结构，重点描述USB设备接口IP核的结构划分和各模块的设计思想，最后给出FPGA验证方案及其实验结果。结果表明此IP核可作为一个独立的模块嵌入到SoC系统中。     

USB2．O设备接口IP核的OPB接口技术研究和实现

USB接口已经成为嵌入式系统与PC连接的首要选择。为了将USB2．0设备接口IP核和PowerPC微控制器集成,需要解决USBIP核和OPB总线分处不同时钟域,以及IP核内部内存映射的问题。为此我们根据OPB总线协议,研究和比较了OPB总线与IP核连接的两种方式,并利用集成了PPC405核的FPGA对这两种桥接方式进行验证,证明该接口设计是可行的。     

基于MPMC的高性能DMA控制器的设计

依据ATA6协议,在FPGA上设计对IDE硬盘的控制模块,同时使用Xilinx的多端口内存控制器MPMC IP核,实现能够访问外部DDR2_SDRAM的NPI接口控制器,在此基础上,利用嵌入式FPGA开发环境,设计顶层控制IP核,完成硬盘控制器与NPI接口的有效衔接,在MicroBlaze的控制下,数据在硬盘与DDR2_SDRAM之间直接高速传输,实现了高性能DMA控制器的功能,从而提高了主机CPU利用率。设计在Xilinx的XUPV5_LX110T 开发平台得到了验证。     

基于EDK的高速数据收发嵌入式用户IP核设计

介绍了基于FPGA嵌入式系统的多通道高速数据收发模块的用户IP核设计。在Xilinx公司的ISE开发工具中,用FPGA器件中的硬核RocketIO及软核FIFO设计用户逻辑;使用嵌入式开发工具EDK封装成可在FPGA嵌入式系统中使用的用户自定义IP核,最后通过实际测试验证了该方法的实效性。     

一种HDMI-CEC控制器的设计与实现

在充分理解HDMI-CEC协议1.4版本的基础上,提出一种消费电子控制器的ASIC电路设计方案。通过对串行接口上波形进行分析,设计了两个分工不同的有限状态机来处理协议的两个重要部分:比特位时序和信息构成。利用可综合Verilog语言完成了消费电子控制器IP核的设计,并且通过NC-Verilog的仿真工具和FPGA开发板验证其功能。仿真结果表明,该设计完全符合HDMICEC通讯接口模块的要求,并且可以作为IP广泛应用于支持HDMI接口的SoC开发中去。     

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.     

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.     

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.     

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