一种基于LVDS的红外图像长距离传输系统设计

为实现红外图像数据长距离传输,设计了一种基于LVDS高速串行链路的系统.LVDS传输系统既符合长距离实时红外图像数据传输的要求,又降低了互联总线的数量,减小了系统互联的复杂性和成本.在FPGA内实现LVDS传输需要的图像数据格式转换.     

图像采集系统中LVDS信号交流耦合传输设计

在光电平台系统中,图像采集设备与系统之间的数字图像传输采用LVDS接口。但由于光电信号微弱、抗干扰能力差,采用传统的LVDS直流耦合传输时图像采集设备容易受到光电系统干扰,成像效果远远不如单机调试。为解决这一问题,本文设计了一种LVDS信号交流耦合传输技术,极大提高了图像采集设备的抗干扰能力。     

LVDS技术在数字视频传输系统中的应用

提出一种基于LVDS技术的视频传输系统,该系统是以APA150和DS92LV18为核心,考虑到长距离图像传输的需要,增加了LVDS差分信号预加重和均衡功能.实践证明,该系统能够满足视频图像的远距离实时传输要求,结构简单且扩展性强.     

EMCCD相机所成图像的长线传输

旨在解决EMCCD相机所成图像的传输距离短的问题。采用一个光电转换模块，将电信号转换为光信号，采用光纤来传输。认真分析了LVDS信号与PECL信号的特点，通过分析、计算，实现了LVDS信号与PECL信号的相互转换。     

LVDS技术在某成像光电跟踪产品中的应用

针对远距离高速信号传输的需求,提出了利用LVDS传输的实现方法,介绍了LVDS的技术原理和特点,并根据某成像光电跟踪产品的结构组成,详细介绍了该产品中LVDS系统的设计实现,并根据设计及调试过程中曾经出现的问题,总结了终端电阻匹配、通道设计、印制板布线等方面的设计要点及注意事项。通过内外场试验,验证了该产品LVDS通讯设计,不仅解决了高速率、大容量、长距离的图像数据传输问题,并具备良好的环境适应性及电磁兼容性。     

基于LVDS的高速数字图像光传输技术研究

红外目标特征捕捉系统对图像分辨率要求越来越高,数字化后的图像数据量急剧增加,高速并行模式不能满足长距离传输的要求。本设计采用多路复用、解复用技术和高速光数据流传输技术实现LVDS Camera图像信号的远距离传输。     

Camera Link协议和FPGA的数字图像信号源设计

介绍一种基于Camera Link协议和FPGA设计数字图像信号源的方法.该设计将图像数据和接口信号转换成与Camera Link协议相匹配的低压差分信号(LVDS)进行传输.提高了信号的传输距离和精度,为图像数据采集装置的测试提供了可靠的信号源.阐述了图像信号源的设计思想与电路结构,最后简述了在实际中的应用.该信号源已经成功应用于某弹载地面测试系统中.     

图像数据远距离传输及高速实时存储技术

研究了一种可以实现图像数据的远距离传输和高速实时存储的技术。该技术以FPGA为逻辑控制单元,通过LVDS接口电路远距离传输采集到的图像数据;利用交叉双平面页编程技术流水线式写FLASH以提高存储速度。用CY7C68013A控制的USB2.0接口上传FLASH中的数据到计算机,最后用上位机软件分析数据。结果表明,该系统稳定可靠地远距离传输并高速存储了图像数据。     

一种基于FPGA的LVDS数据串并转换设计

LVDS传输方式越来越多地应用在高速的信息传输中,而基于FPGA的LVDS数据接收也得到了更广泛的应用。文章介绍了一种基于FPGA的LVDS数据接收的实现方案,对LVDS串行数据进行了串行到并行的转换。通过实际验证,该方法实现了LVDS串行数据的并行处理,保证了转换过程中数据的实时传输。     

宇航用千兆LVDS传输线等长试验研究

LVDS(低压差分信号)技术广泛地应用于对低抖动、信号完整性和共模特性要求较高的系统中。为了确保LVDS信号传输的完整性,对宇航用千兆LVDS传输线(差分线对两绝缘线)等长与否对所传输信号的衰减以及对内延时差的影响进行了试验研究。研究结果发现:两差分传输线非等长是宇航用千兆LVDS传输线中差分信号传输质量下降的主要原因之一,而控制等长的重要工序为对绞,控制手段为张力一致;在传输2Gb/s LVDS信号时,宇航用千兆LVDS传输线中两差分传输线的长度偏差应小于1.6mm。     

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