Optimal zonal wavelet-based ECG data compression for a mobiletelecardiology system

A new integrated design approach for an optimal zonal wavelet-based ECG data compression (OZWC) method for a mobile telecardiology model is presented. The hybrid implementation issues of this wavelet method with a GSM-based mobile telecardiology system are also introduced. The performance of the mobile system with compressed ECG data segments selected from the MIT-BIH arrhythmia database is evaluated in terms of bit error rate (BER), percent rms difference (PRD), and visual clinical inspection. The compression performance analysis of the OZWC is compared with another wavelet-based (Discrete Symmetric Wavelet Compression) approach. The optimal wavelet algorithm achieved a maximum compression ratio of 18:1 with low PRD ratios. The mobile telemedical simulation results show the successful compressed ECG transmission at speeds of 100 (km/h) with BER rates of less than 10^-15, providing a 73% reduction in total mobile transmission time with clinically acceptable reconstruction of the received signals. This approach will provide a framework for the design and functionality issues of GSM-based wireless telemedicine systems with wavelet compression techniques and their future integration for the next generation of mobile telecardiology systems     

基于BREW平台手机图书馆系统的设计

设计并实现了基于无线二进制运行环境（BREW,Binary Runtime Environment for Wireless）无线应用平台的移动图书馆系统,包括：服务器模块、手机端模块,以及创新的手机模块-服务器模块通信协议。阐述了基于BREW无线应用平台的移动图书馆系统的设计与实现过程,给出了关键数据结构,并指出了实现该无线应用系统的关键技术。实践表明,基于BREW平台的手机移动图书馆系统整体解决方案是有效可行的,且具备较高的商业推广价值。     

An efficient demand-assignment multiple-access scheme for satellitemobile radio dispatch networks

Conventional DAMA (demand-assignment multiple access) designs process mobile radio calls in much the same way as mobile telephone calls. In mobile radio dispatch networks, where the dispatcher is often the resource bottleneck, these designs result in the inefficient use of satellite channels. A novel DAMA design is presented that ameliorates this problem by using the block-calls-queued service discipline, batched processing of several calls by the network dispatcher, and pipelined messaging for channel setup verification. Analysis shows that the proposed design offers advantages in satellite channel utilization and DAMA signaling overhead compared to previous designs. As space segment resources are expected to be very expensive in the mobile satellite systems networks under development, the proposed procedures could result in significant cost savings     

Design issues relevant to developing an integrated voice/datamobile radio system

The various design issues related to developing an integrated voice/data mobile radio system, including high speed digital radio frequency modulation in a mobile environment, statistics for the talkspurt/silence gap composition of speech, switching schemes for voice/data integration, encoding techniques, and voice and data traffic statistics are discussed. A performance analysis is conducted for a typical design, showing that a voice-only mobile radio system can be upgraded to an integrated voice/data system capable of carrying the full voice and data loads without requiring additional radio channels and without compromising voice performance. Data traffic is only minimally delayed (46.2 ms mean delay) for a fully loaded system     

A vision of UMTS/IMT-2000 evolution

A vision is presented for a fully IP-based mobile network which goes beyond UMTS/IMT-2000. A top-to-bottom design approach is introduced that is capable of offering new and innovative services and applications to both fixed and mobile users efficiently, cost effectively and in a user-friendly manner. Some issues and examples in the design steps following this new approach are discussed. It is clearly shown that the convergence of mobile and fixed networks will be achieved naturally through the use of an `all IP' based solution for both access and core networks     

Radio Network Aggregation for 5G Mobile Terminals in Heterogeneous Wireless and Mobile Networks

This paper provides a novel design concept for advanced mobile multi interface terminals with radio network aggregation capability and enhanced quality of service (QoS) provisioning for multimedia services (voice, video and data) in heterogeneous wireless and mobile networks. A new module is established which provides the best QoS and lowest cost for any given multimedia service by using simultaneously all available wireless and mobile access networks for a given traffic flow. This novel adaptive QoS module with adaptive QoS routing algorithm is called advanced QoS routing algorithm (AQoSRA), which is defined independently from any existing and future radio access technology. The performance of our proposal is evaluated using simulations and analysis with multi-interface mobile stations with AQoSRA within, carrying multimedia traffic in heterogeneous mobile and wireless environment with coexistence of multiple Radio Access Technologies, such as 3G, 4G as well as future 5G radio access networks. The analysis of the proposed framework for radio networks aggregation in advanced mobile terminals has shown overall better performances regarding the achievable throughput and multimedia access probability in heterogeneous wireless and mobile environment.     

A control and management network for wireless ATM systems

This paper describes the design of a control and management network (orderwire) for a mobile wireless Asynchronous Transfer Mode (ATM) network. This mobile wireless ATM network is part of the Rapidly Deployable Radio Network (RDRN). The orderwire system consists of a packet radio network which overlays the mobile wireless ATM network. Each network element in this network uses Global Positioning System (GPS) information to control a beamforming antenna subsystem which provides for spatial reuse. This paper also proposes a novel Virtual Network Configuration (VNC) algorithm for predictive network configuration. A mobile ATM Private Network–Network Interface (PNNI) based on VNC is also discussed. Finally, as a prelude to the system implementation, results of a Maisie simulation of the orderwire system are discussed. This revised version was published online in June 2006 with corrections to the Cover Date.     

基于“云”的LTEeNB自动化测试系统解决方案

介绍了一种基于＂云＂的LTEeNB测试系统解决方案,以云计算为指导思想,配合LTE基站测试系统各平台结构,提出了一种高效的测试方案。该方案包含了LTE基站测试中子系统测试（SST）、调制板集成测试（MIT）、系统测试（ST）以及端到端测试（MTMT）等各类型。本文在传统测试模式基础上,提出了平台和资源共享测试机制;提供...     

Using Web Pages Accessible Design for the Correct Web Visualization

The objective of this work is to use the recommendations for the accessible design of Web pages and applying them for the correct visualization of Web resources on mobile devices. A small study was made taking in account these considerations, obtaining that are feasible to apply these recommendations or practices of good design for their use on mobile devices. Also a proposal appears to solve the problem of correct Web pages visualization on mobile devices.     

面向后三代移动通信的MIMO-GMC无线传输技术

面向后三代移动通信应用,本文提出多入多出(MIMO)信道环境下广义多载波(GMC)无线传输技术方案,对其中若干关键技术进行了简要阐述,包括广义多载波合成与分析系统的设计与实现、双循环自适应时隙结构、导频设计与信道估计、迭代检测译码方法等,并给出瑞利衰落MIMO信道环境下链路仿真结果.     

Design of a multiple-beam forming network using CORPS optimized for cellular systems

The design of beam-forming networks (BFNs) for a multibeam-steerable antenna array using Coherently Radiating Periodic Structures (CORPS) in cellular mobile communication systems is presented. In this paper, the CORPS technology is introduced and applied to the design of beam-forming networks in cellular systems for the first time. The CORPS-BFNs proposed show improved performance over the common way to feed antenna arrays used in mobile systems. In this design, the input ports of the feeding network design are optimized using the particle swarm optimization (PSO) algorithm. Two 2-beam design configurations of CORPS-BFN for a multibeam-steerable linear array on a cellular scenario are proposed and analyzed. Simulation results show the benefits of BFNs based on CORPS on a cellular mobile scenario based on the array factor response, in terms of side lobe level (SLL) and signal-to-interference (SIR) improvement capability. Furthermore, results for average SIR improvement, signal to interference plus noise power ratio (SINR) and BER are discussed.     

新型电控可重构天线阵全向单元设计

该文提出了一种性能良好的新型方向图可重构天线阵全向印刷单元天线。该天线由两对半波振子背靠背印刷在介质板上构成,结构简单紧凑。相对带宽达50%(VSWR<2),在工作频带内,增益6.44 dBi,不圆度小于2.0 dB。文中给出了仿真设计结果和实测的电参数数据,两者有较好地一致性。本天线适用于WiMax(802.16)终端及WLAN基站或中继站天线。     

Taking the challenge of multiple access for third-generationcellular mobile radio systems-a European view

In Europe, the challenge of the design of third-generation cellular mobile radio systems has been taken numerous research and development activities in this field have been started. The authors try to give an overview of the European activities in this field. The article is organized in two parts. In the first part, the requirements for third-generation cellular mobile radio systems such as Universal Mobile Telecommunications System (UMTS) and Future Public Land Mobile Telecommunications System (FPLMTS), which has been named International Mobile Telecommunications after the year 2000 (IMT-2000) are presented concisely. Also, the importance and challenge of the multiple access design for such third-generation cellular mobile radio systems is explained. In the second part, numerous European research activities with focus on the multiple access design for third-generation cellular mobile radio systems are reviewed     

适合多跳Ad Hoc网络的移动因特网路由器的设计

未来将使用移动路由器来实现移动AcIHoe用户与因特网的连接。本文介绍了移动因特网路由器的设计原理：使用移动IP来实现移动支持，使用无线局域网WLAN(IEEE802．11b)和蜂窝系统(GPRS)来连接多跳Ad Hoe网络(AODV)。     

基于DSP的移动机器人的设计与实现

智能交通系统(ITS)是21世纪城市交通的发展方向，移动机器人作为智能车辆控制系统实验平台的一个主要部分，对ITS的关键技术的研究具有十分重要的意义。文中介绍面向ITS的SJTNC-1移动机器人的组成和结构，详细叙述了基于数字信号处理器TMS320LF2407A的控制系统的设计和实现。     

Building a signaling protocol architecture for future mobile networks

Third-generation mobile systems are emerging. These systems will support a unified user access to a variety of services, including the existing mobile and fixed network (PSTN, N-ISDN) services, the enhanced multimedia and multiparty services envisaged for broadband networks, and personal communication services as well. The role of signaling is predominant in building a flexible, efficient, and evolving system. The aim of this paper is to provide a framework for developing a signaling protocol architecture for future mobile networks. The study especially focuses on the universal mobile telecommunication system (UMTS). Within this framework various design and operational requirements imposed on UMTS can be satisfied. A method to deal with the functional complexity of UMTS is provided. Mobile networks are viewed as integral parts of the broadband infrastructure and are built upon the IN principles.     

智能移动终端产品热设计研究

为了解决智能移动终端局部过热的问题,从平面热布局面积入手,采用热传导技术,抓住多模智能移动终端热源器件布局的关键,给出一个考虑散热的布局最小面积;根据热流密度来计算结构的整机高度。通过热仿真来进行布局和结构设计的模拟,给出结构设计的参考意见,最后通过测试去验证和完善热设计。经过实际产品的发热红外图谱分布试验,获得智能移动产品实际的温度分布平面图,得到了与仿真一致的结论。     

利用3G手机的实时视频新闻直播系统

提出了基于3G智能手机实现视频远程直播系统的方案。方案利用手机的视频拍摄和数据传输功能,实现视频数据的实时传输,并通过电视播出系统和网络流媒体服务器,进行现场直播。最后,给出了方案的实际实现和测试结果。     

Multi-carrier demodulators for on-board processing satellites

A study of the digital transmultiplexor element of an on-board multi-carrier demodulator (MCD) results in design data for various architectures (FFT, tree etc.) which can be applied to a wide range of applications. A detailed design based on the latter for a 4 × 16 kb/s MCD for the U.K. T-SAT mobile OBP payload is presented. Implementation of the MCD using TMS320C25 signal processor technology has been performed and early test results are presented.     

Design and implementation of a wireless internet remote access platform

Recently, mobile networks and internet technologies have been widely developed for the voice communication and information retrieval services all over the world. Compared with the wire‐line internet environment, mobile networks have lower bandwidth, longer transmission latency and unreliable connection, and the capability of mobile terminals is restricted by the limited memory size, lower CPU computation capability and inconvenient I/O interface. These limitations restrict the development of the wireless internet applications. In this paper, we design and implement a ‘wireless internet remote access platform’ (WIRAP). The WIRAP platform interconnects the wireless network and internet to provide mobile users a remote centralized storage and computation environment. A mobile user can store large volume of data and execute complex computations on WIRAP instead of on the mobile terminals. WIRAP supports different network interfaces (e.g. short message service (SMS), wireless markup language (WML) and hyper text markup language (HTML) and users may use terminals (with different network capabilities) to access WIRAP. Copyright © 2006 John Wiley & Sons, Ltd.