On the statistical identification of technology disruption

This study suggests a statistical procedure to identify technology disruption. In particular, a threshold autoregressive model enables the identification of threshold penetration for disruptive technology that affects the dynamic adjustment of an established technology. Both the magnitude and direction of the impact is identified by country World Bank income category in the context of the impact of (disruptive) mobile telephone diffusion on (primary) fixed-line markets. Importantly, as the procedure only requires a short time-series for the introduced technology and can readily be conducted on an ongoing basis.     

Mobile voice diffusion and service competition: A system dynamic analysis of regulatory policy

Dynamic behavior in mobile telecommunications markets is often the result of interactions between market actors. As the structure and dynamic complexity of such interactions tend to be difficult to identify, it is challenging for regulators to anticipate the effects of their policy decisions. This article uses system dynamics to evaluate the effect of technology harmonization and mobile number portability policies on mobile voice diffusion and service competition. This is realized by first modeling the endogenous feedback structure resulting in dynamic behavior in the mobile telecommunications market and then by configuring the model for retrospective simulations of the Finnish market. Based on the retrospective simulations, the effect of technology harmonization and mobile number portability policy decisions is analyzed and the usefulness of system dynamics is demonstrated.     

靶向式域隔离测试技术的移动全业务仿真拨测系统

随着移动通信技术的不断发展,国家3G网络建设的竣工,在原有基础业务支撑的基础上,更多丰富的数据增值业务被电信运营商推出。在提高产业效益的同时,相关的网络、业务维护优化,特别是数据业务的维护日益加重。而传统的数据业务拨测方法在实时性、准确性、稳定性等方面无法满足电信运维人员的工作需求,所以一种新的移动全业务仿真拨测系统被推出,受到广大运维人员的欢迎。     

3G时代中国移动发展对策分析

3G时代对于中国移动来讲，充满了机遇与挑战，在面对新机遇、应对新挑战的发展过程中，应该审时度势进行战略上的调整。从注重3G网络与2G网络的共存和共同发展、重视“眼球业务”、打造“特色业务”、关注“农村市场”、关爱“特殊人群”、重视“集团客户”业务的设计和营销等六个方面提出了中国移动应对新环境、新局面的策略。     

一种基于FFT的Midamble码搜索算法

针对一种基于UTRA TDD LCR时隙结构的ad-hoc网络的通信特点,给出了一种可在DSP上实现的基于FFT的M idamble码搜索算法,并给出了基于该算法的多径搜索实现方案。分析表明,该算法充分利用了DSP的特点,且其运算效率相比于传统的匹配滤波有大大的提高。     

第三代移动通信系统的网络安全问题

本文综述了ＧＳＭ网络的安全机制，第三代移动通信系统应采取的安全机制，合法的窃听及ＥＴＳＩ加密算法的生成过程。     

码分多址数字蜂窝系统容量提高的几种关键技术

个人通信对容量的需求越来越显示出码分多址技术的重要性。本文对照频分多址和蝗分多址系统的频谱效率，阐述了码分多址系统提高系统容量的几项关键技术。     

中日韩电信产业价值链模式对比分析

目前移动数据业务成为运营商利润的增长点,而发展数据业务关键在于处理与产业价值链各环节之间关系,在这方面日韩两个国家发展比较成熟。分析日韩电信产业价值链模式的特点,并与国内的几种价值链模式进行对比,从客户目标、SP/CP管理、与终端关系、利益分成与环境适应性等几个方面总结出我国电信产业价值链和谐发展的对策建议。     

移动通信中基于智能天线的抗多径干扰技术

本文首先概述了多径信道传输特性，在此基础上，重点讨论了基于智能天线抗多径干扰技术的理论，并对基于ＣＭＡ算法的智能天线抑制多径干扰进行了计算机仿真。