基于DSP的FPGA动态重构系统研究与设计

为了提高现场可编程门阵列（FPGA）的资源利用率,在介绍FPGA重构技术的原理和分类的基础上,讨论了Virtex-4系列FPGA的配置原理和动态重构的方法,并设计出数字信号处理器（DSP）配置FPGA的硬件方案来实现可重构系统。FPGA采用SelectMAP配置方式,实现配置逻辑的快速重构和局部动态重构,最后根据Virtex-4的配置流程和时序关系,给出了可重构系统配置的软件流程。经实验测试,该系统稳定可靠,可在1 s内完成5 Mbyte配置程序的动态重构。     

一种用于FPGA互联资源测试的新方法

以基于静态随机存储器（SRAM）的现场可编程门阵列（FPGA）为例,在传统的三次测试方法的基础上提出了一种新颖的针对FPGA互联资源的测试方法。该方法运用了层次化的思想,根据开关矩阵中可编程互联点（PIP）两端连线资源的区别将互联资源进行层次化分类,使得以这种方式划分的不同类别的互联资源能够按一定方式进行叠加测试,这就从根本上减少了实际需要的测试配置图形和最小配置次数。最后,文章将文中的测试方法与传统的测试方法在最小配置次数、故障覆盖率等方面进行了一个简单的比较。     

信号模拟设备中的FPGA重配置设计

介绍了一种现场可编程门阵列（FPGA）重配置设计,详细讲解了其软硬件设计以及具体实现方法,为信号模拟设备的多功能集成提供了一种解决方案。     

基于EDMA实现TMS320C64X与FPGA的数据传输

结合TMS320C64XDSP＋FPGA信号处理平台,简述了TMS320C64X DSP的硬件结构,重点介绍直接存储器访问（EDMA）的硬件结构和配置方法。数据经现场可编程门阵列（Field-Pro-grammable Gate Array,FPGA）及DSP外部存储器接口（EMIF）由EDMA传输到数字信号处理器（DSP）片内,传输过程不需要CPU干预,并且采用乒乓缓冲结构,CPU同时可以进行数据处理,提高了数据传输、处理的速度,保证了实时性。     

赛灵思共同创始人Ross Freeman因发明FPGA荣登2009美国发明家名人堂

2009年2月18日，全球可编程逻辑解决方案领导厂商赛灵思公司宣布，赛灵思共同创始人之一Ross Freeman因发明现场可编程门阵列（FPGA）荣登2009美国发明家名人堂。FPGA是一种可配置的电子线路，内含可配置逻辑元件和可配置互联元件。美国发明家名人堂是美国知名的非盈利性机构，其宗旨是奖励和推动创新和发明。每年都有一批新的发明家入选名人堂，以奖励他们的专利发明为人类、     

可编程逻辑器件的历程与发展

可编程逻辑器件逐渐成为微电子技术发展的主要方向,文章概述了可编程逻辑器件（PLD）的分类、发展历史与发展现状。现场可编程门阵列（FPGA）和复杂可编程逻辑器件（CPLD）是可编程逻辑器件技术按其内部结构不同延伸出的两个分支,文中讨论了它们各自的优缺点,并对它们作了比较。文中特别介绍了FPGA产品的主要生产厂家,以及四大厂家各自产品的应用领域,分别给出了Xilinx公司和ALTERA公司FPGA产品的谱图,最后展望了FPGA产品的未来发展趋势。     

CSOC实现多协议串行控制器

片上系统是集成电路的发展趋势,FPGA则以其灵活的可编程特性可以实现可配置的片上系统（CSOC）。本文介绍了如何利用基于核的设计思想在一块FPGA芯片上集成多路多协议串行控制器。     

CME-M7 FPGA实现可编程芯片与嵌入式处理器的无缝连接

京微雅格（北京）科技有限公司（以下简称＂京微雅格＂）日前宣布推出基于CAP（Configurable Application Platform,可配置应用平台）构架的高集成化CME-M7现场可编程门阵列（FPGA）系列产品。CME-M7在日益成熟的CAP架构上首次整合了ARM Cortex-M3内核,辅以片上存储器、AD转换器、DSP及大容量可编程逻辑,以单芯片的形式解决客户可编程芯片与嵌入式处理器之间无缝连接问题,实现了高性价比的创新。     

基于星地链路的FPGA在轨可重构设计

随着信号处理算法的发展,人们对航天用现场可编程门阵列（Field Programmable Gate Array, FPGA）提出了算法可更新的需求。而传统的固定算法模式已经无法满足要求,所以星上FPGA在轨可重构设计成为了解决这一问题的关键。提出了一种基于星地链路的FPGA在轨可重构设计方案。通过星地链路上载配置数据并将其存入电可擦除只读存储器（Electrically Erasable Programmable Read Only Memory, EEPROM）内,然后利用反熔丝器件对FPGA进行大规模算法重配置操作。这项设计方案已经通过了相关验证,同时也提升了星载FPGA的灵活性。     

Spartan-3A FPGA评估套件升级版

Spartan－3A现场可编程门列阵（FPGA）评估套件升级版在XilinxSpartan－3A FPGA评估套件中增加了赛普拉斯CY3217（MiniProg）编程器,从而可实现触摸感应、USB连接与模拟编程等功能。随同套件提供的CY3217 MiniProg编程器与可下载的PSoC Designer软件能对PSoC器件进行重配置,以实现对集成式USB连接、CapSense触摸感应、时钟以及可编程模拟功能等的评估。     

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.     

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.     

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.     

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.     

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.     

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.     

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