新一代WCDMA基站规模服务HSDPA商用网络

马来西亚:高效功放大幅节省电费 马来西亚是东南亚著名的旅游和工业化国家,移动渗透率超过50%.TM是马来西亚第一大运营商,同时拥有移动和固定运营牌照.2004年10月,华为中标TM项目,成为其主要接人设备供应商.2005年5月,TM的3G网络投入商用.随着网络规模的不断扩大,TM开始关注运营成本的控制和降低.     

烽火通信跨越技术瓶颈 100G商用近在咫尺

虽然目前仍受到成本和功耗问题的制约,但随着电子工艺的发展,从产业链的成熟度和各大运营商测试结果来看,100G已跨越技术瓶颈,即将迎来全面规模商用。2011年底,烽火通信携手中国电信率先完成了国内首个集团级运营商的100G传输系统测试。     

厚积薄发开创100G光传送新时代——访烽火通信公司网络产出线副总裁范志文

从2012年初100G产业链全面成熟以来,烽火通信已经为数十个运营商承建100G网络.从国外的马来西亚电信100G骨干传输网,到国内中国联通干线的部署,烽火的产品已经走过了试商用、商用、产品不断完善的过程. 当前随着云计算、移动互联网、OTT高清视频、社交网络等新兴应用的高速兴起,运营商普遍面临流量带宽压力并陷入"增量不增收"的窘境.作为一项全面革新的传输技术,100G不仅赋予了运营商应对手段,更奠定了整个行业未来长期发展的基础.随着100G在全球范围内规模部署大幕的开启,毋庸置疑接下来将是100G的"黄金十年".     

中兴在马来西亚部署5000个HSPA＋／LTE站点

2011年4月28日,Telenor旗下公司、马来西亚领先的无线运营商DiGi宣布,公司已经选定中兴通讯在马来西亚建设2G／3G,4G“统一无线网络”,从2011年第三季将开始切换到该新网络。     

100G测试驶入高速发展期 一体化测试渐成主流

目前几家主流的设备商都已经宣布推出了自己的100G解决方案,其系统设备也已推出,工信部相关专家指出,2012年,100G设备将进入全面的系统测试阶段,国内100G测试市场亦将全面崛起。今年100G市场异常红火。虽然100G技术本身仍在完善,且处于初期市场推广阶段,然而得益于全球运营商的青睐,目前全球已有二十多家运营商部署了100G的实验局或试点,而且主流的运营商对100G引入也已有规划,已经制定了明确的商用路线。从中国市场来看,中国电信科技委主任韦乐平今年就已明确表明对100G高速传输技术的看好,而且将在国内率先开启100G的测试,今年年底测试工作     

面向3G的城域光网络建设

近年来，由于网络泡沫的破灭及世界经济的暂时衰退使大力发展3G的运营商和电信设备供应商陷入了困境，然而，无论是3G标准的研发，3G设备的制造，还是运营商对3G网络的规划和选型却一直没有停止过。随着日本DoCoMo公司I-mode系统的运营成功以及中国联通CDMAIS-95系统的建立并投入试运营，第三代移动通信系统离我们越来越近了。那么如何为即将到来的3G规划传送网络？目前各大运营商都已经在省际及省内干线部署了大量的DWDM系统，DWDM技术所带来的巨大带宽足以满足3G业务在骨干网的传送，而城域网仍是各大运营商传送网络的瓶颈，但…     

2．4G移动支付解决方案引起亚洲市场关注

近日，具有国内自主知识产权的2．4G移动支付技术亮相马来西亚“第五届亚洲城市通卡运营商论坛”，赢得来自马来西亚、印度、日本、韩国、中国香港、中国澳门、新加坡和新西兰等主要城市通卡运营商及业界同行的关注。     

简讯

阿朗助力Maxis部署100G核心传输网络日前,阿尔卡特朗讯宣布,成为马来西亚领先的综合通信运营商Maxis Berhad的战略供应商,帮助Maxis实现核心传输网络的重大转型。通过部署阿尔卡特朗讯的100G相干光网络解决方案,Maxis将能妥善应对数据流量的持续增长,简化网络并降低成本,同时提高网络效率及可靠性。据介绍,Maxis Berhad的骨干光网络是亚太地区首个采用相干光技术的100G单载波商用网。凭借阿尔卡特朗讯     

100G产业形成完善体系 国内商用契机已经显现

今年国内三大运营商开启100G实验室测试后,马上吸引了全球目光,有业界人士预计,国内运营商开启100G现网部署后,将导致现有100G市场格局的重新洗牌。近日,中国移动发布了其2013年OTN传输设备集中采购招标公告,采购共分6个标包,其中重点提及100G的设备集采,此次集采的六个标包与今年10月发布的集采内容趋同,据了解中国移动今年的各项集采规划都被延期,此次集采很可能是上次集采的延续。然而值得一提的是,中国移动的100G现网部署规划已开始加速。2012年,三大运营商相继开启100G实验室测试,并对各主流系统设备供应商的100G设备进行了集中测试,从测试结果来看,各家的设备性能都已     

国内100G市场兴起 年内或将实现现网部署

数据显示,尽管光网络市场受全球经济影响略有下滑,但带宽持续提升促进了40G/100G市场规模的迅猛提升,2012年第二季度,100G市场规模同比增长227%。100G技术经过近两年的市场培育,终于逐步走入现实。中国电信科技委主任韦乐平已经指出,100G技术已经成熟,2013年将迎来市场爆发期。而今年中国移动率先开启100G的现网测试,验证了100G系统性能、组网能力、稳定性和可靠性,更为国内运营商现网引入100G技术做好铺垫。自去年年底以来,三大运营商都加快了100G的引入步伐,并相继开启100G的测试,从多方面验证了100G系统的各项性能指标以及各主要设备供应商的设备性能,结合中国     

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