谱泻郴州数据通信新篇章

本分析了郴州市电信分公司数据通信局快速发展数据业务的两个独到之处。一方面，该局从经营机制上进行大胆改革和创新，实行公司化运作，从政策上创造了发展的条件；另一方面，该局代理代办代维的发展模式为他们带来了丰厚的回报，非常值得借鉴。     

无线数据通信技术

无线数据网—广域网（ＷＷＡＮ）与局域网（ＷＬＡＮ）因其不使用电缆或光缆,特别适用于移动用户与临时用户访问现有的数据网络。本文介绍了几种现有的ＷＷＡＮ网络,着重讨论了ＷＬＡＮ网络的ＩＥＥＥ８０２．１１标准媒体访问协议（ＭＡＣ）与物理层（ＰＨＬ）。分析表明,直扩系统（ＤＳＳＳ）比跳频系统（ＦＨＳＳ）具有更好的误码性能、传输距离及通过率等特性。     

无线数据通信技术概述

在介绍无线数据通信基本要求的基础上，介绍了移动数据网、无线局域网及其技术特征、应用情况、市场前景；最后简单分析了无线数据通信传输技术、网络结构和媒质接入控制问题。     

创意产业开辟移动 通信新天地

2007年的夏天注定是一个不平凡的夏天。这个夏天整个神州大地掀起了一股“创意产业”的热浪。政府、企业、用户给予了这个新兴产业莫大的关注。各地举办的“创意论坛”多如牛毛,一大批的创意产业基地孕育而生。 创意产业最早起源于英国,1997年,TonyBIair赢得英国大选成为首相后,新工党政府为了振兴英国经济与提高GDP,决定以发展知识为目的,将英国自低迷的经济情势转变为“Cool Britannia”,便于当年七月成立文化媒体体育部（The Department of Culture,Mediaand Sport）。     

发展移动电话"代理商”借助外力拓展市场

发展移动电话代理商是移动通信企业借助外部力量扩展移动通信市场的重要途径.介绍了发展移动电话代理商的客观必然性和如何选择移动电话代理商,阐述了如何加强对代理商的管理,最后结合相关的政策法规详细讨论了移动通信企业和代理商之间法律性质关系的确定.     

选择新角度,开拓新视野——摄编电视新闻《渤海明珠曹妃甸》的几点成功启示

电视新闻的生命力在于新。采访编辑制作播放必须选择新颖角度,引导观众开拓新的视野。《渤海明珠曹妃甸》成功地抓住了新字,拍出成功力作。精心造景,以景立题;巧用同期声,画龙点睛;选用明快画面,揭示内涵;多角度多侧面,展示新意境。     

A New Differential CMOS Current-Mode Preamplifier for GBps Data Communications

This paper presents a new low-voltage fully differential CMOS current-mode preamplifier for GBps data communications. The number of transistors between the power and ground rails is only two so that the minimum supply voltage is one threshold voltage plus one pinch-off voltage. The preamplifier is a balanced two-stage configuration such that the effect of bias-dependent mismatches is minimized. A new inductive series-peaking technique is introduced to increase the bandwidth by utilizing the resonance characteristics of LC networks. In addition, a new negative differential current feedback technique is proposed to boost the bandwidth and to reduce the value of peaking inductors. The preamplifier has been implemented in TSMC 0.18 μm, 1.8 V, 6-metal mixed-mode CMOS technology and analyzed using Spectre from Cadence Design Systems with BSIM3v3 device models. For an optical front-end with a 0.3 pF photodiode capacitance, simulation results demonstrate that the preamplifier has bandwidth of 3.5 GHz and provides a transimpedance gain of 66 dBΩ. The total chip area is approximately 1 mm² and the DC power consumption is about 85 mW. Bendong Sun received the B.Eng. degree in electrical engineering from Shanghai Jiaotong University, Shanghai, China, in1992, and the MASc degree in electrical and computer engineering from Ryerson University, Toronto, Ontario, Canada, in 2003. He is currently working towards the Ph.D. degree in electrical and computer engineering at University of Waterloo, Waterloo, Ontario, Canada. During 1992 through 1998 he was a Design Engineer at China Electronics Engineering Design Institute, Beijing, China. From 1998 to 2000 he worked for Bently Nevada Corporation, a GE Power Systems business, as a System Engineer. Since 2001, he has been a Research Assistant with the System-on-Chip Laboratory at Ryerson University. His research interests include design of analog and mixed-signal integrated circuits for high-speed data communications. Fei Yuan received the B.Eng. degree in electrical engineering from Shandong University, Jinan, China in 1985, the MASc degree in chemical engineering and PhD degree in electrical engineering from University of Waterloo, Waterloo, Ontario, Canada in 1995 and 1999, respectively. During 1985–1989, he was a Lecturer in the Department of Electrical Engineering, Changzhou Institute of Technology, Jiangsu, China. In 1989 he was a Visiting Professor at Humber College of Applied Arts and Technology, Toronto, Canada. During 1989–1994, he worked for Paton Controls Limited, Sarnia, Ontario, Canada as a Controls Engineer. Since July 1999 he has been with the Department of Electrical and Computer Engineering, Ryerson University, Toronto, Ontario, Canada, where he is currently an Associate Professor and the Associate Chair for Undergraduate Studies and Faculty Affairs. He is the co-author of the book “Computer Methods for Analysis of Mixed-Mode Switching Circuits” (Kluwer Academic Publishers, 2004, with Ajoy Opal). Dr. Yuan received an “Excellence of Teaching" award from Changzhou Institute of Technology in 1988, a post-graduate scholarship from Natural Science and Engineering Research Council (NSERC) of Canada during 1997–1998. He is a senior member of IEEE and a registered professional engineer in the province of Ontario, Canada. Ajoy Opal (S'86-M'88) received the B. Tech degree from Indian Institute of Technology, New Delhi, India in 1981, and the MASc and PhD degrees from University of Waterloo, Waterloo, Ontario, Canada in 1984 and 1987, respectively. During 1989–92 he worked for Bell-Northern Research in the area of analog circuit simulation. He joined the Department of Electrical and Computer Engineering, University of Waterloo in 1992 and currently a Full Professor. Dr. Opal works in the area of simulation of analog and mixed digital-analog circuits, such as, switched capacitor, switched current, oversampled sigma-delta modulators. Other interests include circuit theory and filter design.     

开创手机应用新天地

继今年5月推出业内领先的移动多媒体博客后，8月16日，拥有全球领先移动多媒体通信和信息服务技术的行业领跑者——掌中无限再度发力，正式宣布与中国最大的手机软件和整机方案设计供应商之一——德信无线结成战略联盟。[编者按]     

RepliStor 5.2开创数据同步的新篇章

增加了对Windows Server 2003的支持；支持所有级别的Windows Server 2003的服务器，包括Windows Server 2003，Windows Advanced Server 2003，Windows Datacenter Server 2003以及Windows Storage Server 2003。     

开放数据流通--用于构建现代数据通信解决方案的设计准则

多服务供应平台(MSPP)具有为网络增加数据中心协议的能力。通过将以太封包压缩进SONET同步净荷包(SPE)的方式来增加MAN内的Packet-Over-SONET(PoS)连接。或者直接在光纤上传送基于DWDM的以太业务。MSPP设备可以通过快速和廉价的方式满足运营商对数据网络的需求。因此成为服务商供应城域以太业务的最佳平台。     

OFDM技术在移动数据通信中的应用

OFDM被普遍认为是第三代以后的移动通信的主流技术,本文通过对ODFM技术的介绍和移动数据通信特点的分析,阐述了OFDM技术的特点和优势,以及在移动数据通信中的应用。