家庭信息网络与“蓝牙”技术

论述家庭信息网络和一种新型的短距离无线连接技术“蓝牙”,探讨家庭信息网络的特点,比较几种无线连接技术的优缺点,在此基础上提出家庭信息网络拓扑结构,并详细介绍“蓝牙”技术独特的核心协议。最后描绘家庭信息网络和“蓝牙”技术的应用前景。     

蓝牙安全机制

蓝牙技术是一种无线数据与语音通令的开放性规范,它以低成本的近距离无线连接为基础。为固定与移动设备通信环境建立一种无线连接。由于蓝牙系统的移动性和开放性,使得其安全问题显得尤为重要。本文对蓝牙技术的安全结构作了描述,详细介绍了蓝牙链路层和应用层的安全机制。     

蓝牙技术介绍及前景展望

蓝牙是一种新型的短距离无线连接技术,作为一种短程无线数据传输标准,蓝牙有着广泛的应用前景。本文首先介绍了蓝牙技术,然后介绍了蓝牙的应用场合,最后展望了蓝牙的发展前景。     

蓝牙技术的应用

文章简要介绍了一种短距离无线连接技术——蓝牙技术的应用。蓝牙技术是近几年出现的一种工作在2.4G的ISM频段的无线连接技术,它用无线接口取代现有的有线电缆在各种数据设备间传输数据。蓝牙的应用很广,该文着重阐述了几个蓝牙应用模型:蓝牙耳机应用,蓝牙无绳电话应用,蓝牙传真应用,蓝牙拨号网络应用及蓝牙文件传输应用。根据蓝牙应用模型,该文介绍了蓝牙在实际生活中的商业应用:蓝牙耳机,蓝牙无绳电话,无线调制解调器,支持蓝牙的计算机及其他外设。最后,文章指出了蓝牙发展应用中有待提高的几点技术缺陷。     

蓝牙技术介绍及前景展望

蓝牙是一种新型的短距离无线连接技术,作为一种短程无线数据传输标准,蓝牙有着广泛的应用前景。本首先介绍了蓝牙技术,然后介绍了蓝牙的应用场合,最后展望了蓝牙的发展前景。     

蓝牙技术讲座 第1讲 蓝牙技术的发展与技术标准

蓝牙技术是一种无线数据和语音通信的开放性全球规范,其目的是实现各种电子设备的低成本、短距离的无线连接。本文介绍了蓝牙技术的发展概况、蓝牙技术的优点和特点以及蓝牙技术的主要标准。     

浅议蓝牙

所谓蓝牙，实际上就是一种短距离(10～100米)的无线连接技术，把一种微型、廉价的通信模块嵌入各类信息设备中，实现这些设备的无线互联，而不是用电缆。它采用全世界统一的开放性规范，使不同厂家的移动电话、计算机、信息家电互连互通成为可能。蓝牙技术是一种用于替代便携或固定电子设备上使用的电缆或连线的短距离无线连接技术。蓝牙设备使用全球通行的、无需申请许可的2.45GHz频段，可实时进行数据和语音传输。在办公室、家庭和旅途中，无需在任何电子设备间设专用线缆和连接器。通过蓝牙遥控装置可以形成一点到多点的连接，即在该装…     

蓝牙技术讲座第1讲蓝牙技术的发展与技术标准

蓝牙技术是一种无线数据和语音通信的开放性全球规范，其目的是实现各种电子设备的低成本、短距离的无线连接。本介绍了蓝牙技术的发展概况、蓝牙技术的优点和特点以及蓝牙技术的主要标准。     

基于SiW1502和SiW1602的蓝牙模块方案

蓝牙技术是一种点对点或点对多点的短距离无线连接技术方案 ,而蓝牙模块是蓝牙技术的硬件基础。文中介绍了SiliconWave公司的射频及调制解调器SiW1502和链路控制器SiW1602的主要特点、内部结构以及由它们构成蓝牙模块的设计方案     

基于蓝牙技术的无线局域网络系统设计

文中首先介绍了蓝牙关键技术和其主要特点,蓝牙技术(Bluetooth)是一种开放的低成本、短距离无线连接技术规范的代称,用于传送语音和数据;同时介绍了局域网的相关知识,并根据蓝牙技术的特点,阐述了应用蓝牙技术构建无线局域网的意义,以此为基础提出了基于蓝牙技术的无线局域网解决方案,给出了系统的具体结构图,此解决方案对计算机和通信技术的发展具有极大的理论和实际意义.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.