支持终端一致性测试的TD-SCDMA协议测试平台的构建

本文介绍了协议一致性测试基本理论,提出了一种TD-SCDMA终端协议一致性测试平台的构建方法,描述了该平台的功能、框架结构和实现方法,并举例说明对该测试平台如何使用TTCN实现一致性测试和模拟网络基本功能.     

WiMAX认证协议一致性测试的内容与方法

对WiMAX认证协议一致性测试作了较全面的介绍.首先介绍了协议一致性测试的意义,然后讲述了WiMAX协议一致性测试所包含的主要内容和测试平台,最后对WiMAX认证协议一致性测试的现状做了分析.     

DMR空中接口协议一致性测试技术的研究

文章介绍了DHR的产生、发展以及DMR协议体系结构。基于协议一致性测试的基本概念,划分出了DHR协议一致性测试集,分析了一种特定的DMR一致性测试系统,对基站DLL层的一致性测试进行了具体的分析和研究。     

TD-SCDMA移动终端协议一致性测试技术的研究

根据我国基于TD-SCDMA技术的第三代移动通信系统的发展战略,提出TD-SCDMA移动终端协议一致性测试技术的研究.着重介绍了一致性测试的原理,TD-SCDMA移动终端协议一致性测试的方法,测试系统的设计和实现,抽象测试集的生成.通过对该项技术的研究,可为TD-SCDMA移动终端设备提供标准的、实用的协议一致性测试方法和工具,以解决接入网络时产生的协议非一致性问题.     

基于WIA-PA协议的网关一致性测试系统的设计

一致性测试系统是进行协议一致性测试的基础。本文主要介绍了一种基于WIA-PA协议的网关一致性测试系统,并对测试系统的拓扑结构和测试过程的设计进行了说明。     

安立GCF和一致性测试方案

一致性测试是业内对 W C D M A 移动终端在商用之前的一个非常重要的测试,也是运营商、手机厂家等非常关注的一项测试内容。各种移动通信协议标准　(例如GSM、WCDMA)　 都明确定义了在各种想象得到的状态下手机和网络的行为和反应,一致性测试检查手机的行为是否和协议标准规定的相一致,由此运营商和设备厂家可以信赖通过一致性测试的手机。 3G 一致性测试主要分为如下几个部分:RF、Protocol、UICC/USIM 和Acoustic等。 一致性测试的具体内容主要包括协议一致性测试和射频一致性测试,是一致性测试中非常重要的部分。占了一致性…     

WCDMA终端协议测试解析

介绍了协议测试的概念：包括一致性测试和互操作性测试,介绍了WCDMA终端一致性测试并对测试案例结果进行了分析。     

计算机网络协议测试及其发展

协议测试已经成为计算机网络和分布系统协议中最的领域之一。近年来，协议一致性测试技术得到了很好的发展和完善，与此同时，互操作测试和性能测试逐渐成为新的研究热点。本文在分析协议一致性测试的基础上，对协议测试的发展进行讨论。     

网络通信协议一致性测试研究

网络通信协议设计及开发的复杂性导致了协议工程技术的出现。文章主要研究协议测试理论中的一致性测试技术。在深入分析了一致性测试技术的原理及参考标准的基础上,针对现有的几种测试方法,分别阐述了它们各自的测试原理,并分析比较了几种方法的优缺点及适用场合。     

基于TTCN的测试执行方法及其应用

测试执行是协议一致性测试系统中的主要部分，本文提出一种基于测试描述语言ＴＴＣＮ的操作语义对标准测试集进行了解释执行的测试执行方法，利用这种方法所实现的一致性测试系统具有很强的灵活性和独立性，同时大大提高了测试的效率，另外，我们还介绍了基于这种测试方法所完成的协议一致性测试系统（ＰＣＴＳ）的总体结构，设计思想以及测试配置。     

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