cdma2000系统的下一代技术

本文简要介绍了cdma2000的下一代技术-lx/EV-DO和lx-EV-DV技术的特点，着重分析了这两种技术的产生背景，信道构成、网络结构。     

下一代BGA封装技术概述

本文简要叙述了下一代BGA封装技术-缩小型的BGA，诸如略大于芯片的载体（SLICC）、倒装焊BGA（FCBGA）和基于TAB的BGA（金属TCP、S-FPAC，高密度QFP）以及无铂焊料的采用，并概述了其应用状况。     

面向新一代移动通信的智能移动通信技术

第三代系统移动通信,其最重要的技术特征将是智能移动通信技术,即系统的各功能模块将由智能化处理单元来实现.本文在论述了智能移动通信技术在新一代移动通信系统中的地位和作用后,就智能天线、智能传输、智能接收、和智能化通信协议等方面的技术思想、研究成果和发展水平进行了综合评述.最后,讨论了智能移动通信技术将出现的进一步发展.     

下一代光因特网管理技术

网络管理作为网络的关键技术之一 ,是当前通信业界的一个研究热点 ,受到了国内外通信公司及科研部门的重视。本文讨论了基于TCP/IP的简单网络管理协议 (SNMP)的概念、模型与操作 ,描述了策略管理和基于SNMP的网络管理的原理、管理信息库和实现方式。最后 ,在SNMP网络管理系统基础上提出了一种新的光因特网管理方案。     

下一代预警机雷达技术

在现代信息化战争中,预警机雷达作为战场信息获取和指挥控制的关键节点,发挥着不可替代的作用.面对日益复杂的战场环境,作战体系对预警机雷达提出了更高的要求;同时,随着基础技术的不断发展,预警机雷达所能实现的功能也日趋丰富,文中探讨了其应用功能的变化,并对其功能实现上所需解决的关键技术进行了说明.     

下一代SDH传送网的关键技术

介绍支持数据业务的下一代同步数字体系(SDH)所用关键技术(通用成帧规程(GFP)、虚级联(VC)和链路容量调整方案(LCAS))的主要技术特点,比较了使用VC技术前后的带宽利用率;重点阐述LCAS帧结构各字节的含义及其表示方法,介绍LCAS的实现方式和链路容量调整的详细过程;最后分析LCAS技术在自动交换光网络(A-SON)中的作用及商用实例。LCAS与VC、GFP结合,能使新一代SDH网络更好地支持二层交换业务,全面适应数据业务的需求,在现有传输网上实现ASON的某些功能,逐渐过渡到智能光网络。     

The Photonic Technologies Impact on the Next Generation Network

This paper describes the possible impact of photonic technologies on the next-generation network. With the explosion of the Internet (IP), the capacity demand is increasing exponentially, which exceeds Moor's law. The next-generation IP network should sustain this increase. This paper shows the possible node processing bottleneck even the transmission capacity can be supported by the use of WDM technology. Based on this analysis, the paper proposes a virtual router network as a solution, which applies a logical full-mesh connection based on salient features of photonic network technology. Development of the WDM technology sets the target at 1000 wavelengths on a fiber so that a dynamic wavelength routing function is becoming available. The increase in wavelengths, transparency among wavelengths, and the wavelength routing function can provide an optical path, which forms the base of a logical full-mesh structure and also provides an easy migration scenario from the current network to the next-generation IP network. The possibility is examined by calculation using a bi-directionalloop network as an example. As the foundation of the proposal, the current statusof photonic network technologies is described with future projection.     

OCDMA系统中一种新的多倍长光垂直码

提出了一种新的容量大、相关性好的多倍长、多波长二维光正交码（2D MW-OOC），基于多倍长一维光正交码（1DOOC）构造了MW-OOC。对同时使用具有2种码长的MW-OOC的光码分多址（OCD-MA）系统性能分析表明，使用该MW-OOC的系统性能良好，明显好于同样码长下的多倍长1-DOOC；使用短码序列的信号误码率性能好于使用长码序列信号的误码率性能。这些特征能充分发挥OCDMA系统大容量的技术优势，满足将来大容量多媒体OcDMA网络系统对同时传输的不同信号所需传输质量不同的需求。     

VLSI Implementation of the Multistage Detector for Next Generation Wideband CDMA Receivers

The multistage detection algorithm has been proposed as an effective interference cancellation scheme for next generation Wideband Code Division Multiple Access (W-CDMA) base stations. In this paper, we propose a real-time VLSI implementation of this detection algorithm in the uplink system, where we have achieved both high performance in interference cancellation and computational efficiency. When interference cancellation converges, the difference of the detection vectors between two consecutive stages is mostly zero. Under the assumption of BPSK modulation, the differences between the bit estimates from consecutive stages are 0 and ±2. Bypassing the zero terms saves computations. Multiplication by ±2 can be easily implemented in hardware as arithmetic shifts. However, the convergence of the algorithm is dependent on the number of users, the interference and the signal to noise ratio and hence, the detection has a variable execution time. By using just two stages of the differencing detector, we achieve predictable execution time with performance equivalent to at least eight stages of the regular multistage detector. A VLSI implementation of the differencing multistage detector is built to demonstrate the computational savings and the real-time performance potential. The detector, handling up to eight users with 12-bit fixed point precision, was fabricated using a 1.2 m CMOS technology and can process 190 Kbps/user for 8 users.     

无线图像应用及下一代图像技术

随着多媒体通信业务的迅速发展,人们对移动业务也提出了新的要求。简要介绍了第三代移动通信中的图像业务,其中包括一项重要的业务－多媒体消息业务,并在此基础上分析了新业务以及多业务网络的发展对图像应用和格式所提出的一些要求,最后结合这些要求详细介绍了新制度的ISO／IEC图像标准－JPEG2000     

下一代内容分发网络及关键技术分析

针对电信运营商以不同业务应用的场景,各自建设内容分发网络(Conternt Delivery Network)的现状,从基于网络视讯框架的下一代IPTV的观点出发,为了降低运营商建设CDN的建设成本和维护成本,提出了不同业务的CDN应融合成为统一的下一代CDN架构,讨论了基于该统一架构下,需要突破的关键技术。     

下一代分组传送网的新技术发展走向

本文从分析现有传送技术所面临的挑战入手,研究和分析了分组传送网应有的处理对象和相应的处理原则等核心问题,进而指出了分组传送网体系架构对下一代传送新技术的要求。本文还对主流的分组传送网新技术进行分析与讨论,总结了这些新技术的发展轨迹,相互融合的能力和分层与综合的特点,为从整体上把握下一代分组传送网新技术竞争和融合的发展趋势提供了参考。     

TD-CDM-OFDM:下一代的TD-SCDMA

TD-CDM-OFDM是一种针对现有的TD-SCDMA系统在高数据速率、时延、移动速度、覆盖范围等方面的不足而提出的B3G系统.该系统融合了一部分4G的核心技术,完全可以满足未来移动通信的需求,成为LTE计划中强有力的竞选方案.     

Road to Next Generation Mobile Networks: An Evolutionary Dynamics Approach

One of the major challenges that mobile operators (MOs) are faced with nowadays is the transition to 4th Generation (4G) mobile communication technologies. The main reason for this lies on the reluctance of MOs to invest in a new technology without being sure about its success. The current paper investigates the decision-making procedures of a MO that wishes to migrate from its current technology type to 4G. Traditionally, the decision of deploying a new technology has been based on the analysis of similar implementations in other countries. However, such approaches can be inefficient and time consuming, as there are discrepancies concerning the technological progress among different countries. To this end, the authors employ evolutionary game theory to model the interactions of the MO’s decisions and the subscribers’ needs, and propose a practical and efficient qualitative model that identifies the circumstances under which the transition towards 4G networking can be facilitated. Specifically, the mathematical foundation of the decision making process is provided and the key role of the charging price and the quality of experience by the subscribers for using 4G connectivity is proven. With the process of 4G deployment still ongoing, this paper aims to present an analysis that can be used supplementary to the decision process of a MO that aims to evolve his network.     

下一代高速无线宽带通信系统的关键技术研究

全面叙述了下一代高速无线宽带系统将要采用的无线宽带传输技术及其特点。分析了新技术在无线宽带网络中的应用，探讨了无线宽带网络进一步的发展趋势。     

下一代卫星网络路由技术研究进展

分析了下一代卫星网络中路由技术所面临的各种挑战,探讨了下一代卫星网络中路由技术的研究进展,并对下一代卫星网络中路由技术的研究热点和前景进行了总结和展望.     

基于软交换的下一代网络技术

虽然因特网快速发展，丰富多彩的数据型业务不断涌现，但受制于现有的电信网络和IP网络结构和技术，如何开拓更多更丰富的服务，下一代网络（NGN）技术就是这些问题最佳的解决方案，本文介绍了下一代网络的基要概念和特点，分析了下一代网络的框架结构，其核心技术软交换（SoftSwitch)，相关协议，存在问题及发展前景。     

下一代光刻技术

介绍了下一代光刻技术的演变,重点描述了浸没式光刻技术、极端远紫外光刻技术、纳米压印光刻技术和无掩模光刻技术的基本原理、技术优势、技术难点以及研发,并展望了这几种光刻技术的前景。     

picoChip着眼下一代无线通信技术加快中国战略布局

2007年3月6日,全球领先的多内核数字信号处理器(DSP)芯片和无线通信方案供应商picoChip设计有限公司隆重宣布:公司在中国设立的全资子公司比克奇(北京)技术有限公司(picoChip