基于PCI-Express的高速数据交换设计及应用

提出了利用PCIE总线技术实现数据高速传输的方案,结合共享内存、DMA等技术设计了基于PCI—Express总线的高速数据传输卡．实现了将采集的数据实时传送到PC的共享内存缓冲区,数据传输采用DMA方式。采用接口器件PEX8111实现PCI—Express总线到PCI总线的桥接。使用FPGA编写PCI总线的接口逻辑,最后进行测试。     

PCI Express——高速串行互联接口标准

本文介绍了PCI Express以及用FPGA实现PCI Express接口的优势.     

一种PCI Express总线高速数据传输系统

针对数据加密系统中传输数据量大、对传输速度要求高的问题,基于PCI Express协议设计一种高速数据传输系统。系统选用PEX8311芯片实现PCI Express协议,基于PEX8311的DMA传输模式定义系统数据传输方式,选用现场可编程门阵列(Field Programmable Gate Array,FPGA)芯片实现数据加密系统的管理功能,数据加密设备通过PCI Express接口与系统主设备进行通信。实际测试结果显示,设计方案可行,且在提高系统性能方面有明显的优势。     

基于PCI Express总线的雷达数据采集系统的实现

由于雷达信号处理的要求,需要对雷达数据进行高速大容量记录,本文介绍了基于PCI Express总线的雷达数据采集系统的实现,该系统以FPGA为控制核心,PCI Express核为基础,分析了PCI Express核的特点,设计了专用控制逻辑,最后给出了控制逻辑的仿真图。设计中采用双端口RAM作为缓存,利用FPGA实现数...     

PCI Express桥接——优化PCI的读取性能

PCI Express是目前PC芯片集及嵌入式处理器的普遍互连标准.尽管之前的PCI标准由PCIe所取代,但FPGA和I/O设备仍使用PCI.当前基于PCI的设计均采用未集成PCIe接口的组件,因此若要升级系统,需使用PCIe桥接器.例如,PCIe桥接器将用于采用I/O设备的嵌入式视频录音机,通过PCI连接至具有PCIe端口的嵌入式处理器.     

德州仪器推出新一代PCI Express物理层芯片

德州仪器(TI)推出第三代离散式PCI Express物理层(PH Y)芯片,扩充了PCI Express产品阵营。该产品有高度灵活性,可显著缩小板级空间,旨在连接PC外接卡、通信、测试设备、服务器及其他嵌入式系统应用中的A SIC与低成本FPG A。TI设计的新型PH Y符合PCI Express1.1规范,与其他PCI Express应用实现互操作具有关键意义。该款新器件基于TI在众多展会上演示并业经验证的测试芯片。此外,该解决方案还适用于TI已上市的PCI Expres1394a与PCI Express桥接技术。TI PCI Express PH Y拥有8位与16位接口,为电路板设计人员提供了极高…     

德州仪器与Altera携手打造低成本PCI Express

日前，德州仪器（TI）与Altera公司共同宣布推出一款符合PCI—SIG规范的低成本解决方案。该款产品不仅可降低成本，而且能够加速基于PCI Express的系统开发，适用于视频卡、数据采集、测试与网络设备以及各种嵌入式应用。这款强大可靠、方便易用的产品采用TI的XIO1100 PCI Express xl物理层（PHY）芯片、Altera的低成本Cyclone^TM Ⅱ FPGA，并且具备PCI Express xl MegaCorn（r）知识产权（IP）功能。     

基于FPGA的PCI接口数据采集系统设计研究

本文从研华公司在FPGA基础上的PCI接口数据采集系统设计经验入手,对基于FPGA的PCI接口数据采集系统的硬件和软件设计进行了详细分析,最后对相关设计进行了测试,希望为我国相关领域的发展起到促进作用.     

基于RocketIO的PCI Express控制器设计

根据PCI Express 1.0a标准,讨论了基于Xilinx RocketIO在FPGA上实现高性能可定制的PCI Express Endpoint控制器的可能性,并分析了设计难点和制约性能的关键,提出了提高可重用性的设计结构.同时为了保证PCI Express协议的兼容性,和其它功能验证要求,搭建了一个PCI Express Endpoint IP验证平台,并介绍了验证中的一些难点和解决方案.     

基于PCI的双向高速传输系统

为了实现FPGA与PC之间高速数据的双向同时传输,设计了采用PCI接口实现的双向高速传输系统。系统中采用PCI9054作为PCI接口芯片连接PCI总线与FPGA,并通过PCI驱动程序的设计来提高数据传输效率。经过测试,该系统的速度在双向传输上可以同时达到至少80 Mb/s的速率。该系统可以应用在PC与FPGA之间需要大量数据交换的场合。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.