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。     

常见分集合并系统的性能分析

在移动通信中,分集技术是一种最有效的抗衰落技术。本文对3种常见的线性合并分集技术进行简要分析,给出它们的基带表示和合并器输出信噪比的概率密度函数(pdf),由此给出它们的合并增益。针对系统采用MPSK调制的情况,对瑞利衰落信道的3种合并分集系统的比特误码率(BER)性能进行理论研究,分别给出选择性合并(SC)和最大比率合并(MRC)系统的理论比特误码率表达式;对于等增益合并(EGC)分集,给出了一种近似的EGC系统的输出信噪比的pdf,由此导出EGC的一种近似的BER表达式,由蒙特卡罗仿真结果可以看出此近似的BER数值结果是准确的。数值结果显示:MRC性能最好,EGC性能稍差,而SC性能较差。文中给出的分析方法对于实际分集系统的理论研究具有普遍的指导意义。     

从USPTO专利数据看中国手机产业技术优势

采用专利计量分析方法,选取美、日、韩3个手机产业强国为标杆,对中国手机产业技术优势进行了国际比较研究。从USPTO专利库中获取手机产业相关专利数据,对中、美、日、韩4国在手机技术领域的RTA、FGSI和CV值进行测定,并绘制相应的FGSI-RAT技术象限图进行分析。结果表明：与国际手机产业标杆国相比,中国手机产业在光学、半导体器件等技术领域存在技术优势,日、韩为中国手机产业发展中的主要参考学习与竞争对象,而美国表现出的疲态可为中国手机产业未来发展与转型提供借鉴。     

The influence of customer loyalty on small island economies: an empirical and exploratory study

There is growing consensus that companies' long-term success is reliant on building and sustaining strong customer relationships. This study explores the antecedents of loyalty in business to business (B2Bs) using Guernsey's telecommunication industry as a case study. It examines how these influence customer loyalty orientation and factors that help service providers improve loyalty rates. Extant literature pays little attention to the antecedents of loyalty in small island economies. Prior research focuses on cultural, environmental and macro-economic issues. Drawing on Dick and Basu's (Customer loyalty: Toward an integrated conceptual framework. Journal of the Academy of Marketing Science, 22(Spring), 99–113, 1994) loyalty model, this research explores loyalty antecedents that are cognisant of distinct market conditions that can impact customer loyalty within the telecommunications sector of a small island economy. It seeks to advance understanding of loyalty in B2B relationships in this context and identify factors that contribute towards converting passively loyal customers to being actively loyal customers.     

The performance implications of demand-side diversification: evidence from the US telecommunications sector, 1990–1996

This article contributes to the emerging demand-side perspective in strategy by explaining the demand-side sources of the systematic performance differences (a) between firms that diversify to offer complementary products and those who choose not to diversify, and (b) across and within diversifying firms over time. The US Telecommunications Services sector during 1990–1996 provides a dynamic research setting to test our hypotheses concerning the value-generating effect of shared demand-side strategic assets across the diversifying firms' home- and target-market. We find that the overall quality of demand-side strategic assets of local telephone companies who chose to diversify to offer complementary long-distance services (to their local telephony customers) is higher than those who chose not to diversify. We also find that the variation in market-shares of the diversified local telephone companies in their respective target market(s) for complementary long-distance services is positively influenced by the quality of demand-side strategic assets deployed in the target markets.