基于低功耗蓝牙的智能手机车身控制系统研究

提出了一种基于低功耗蓝牙的智能手机汽车车身控制系统。在汽车车身上安装低功耗蓝牙模块,支持蓝牙4.0规范的智能手机通过相关应用程序与低功耗蓝牙模块通讯。手机控制命令通过蓝牙信号传递到车身,车身上的其他控制模块接收到控制命令后执行相应动作,并将对应的状态信息通过蓝牙信号返回给手机,显示在手机应用程序界面,使用户通过智能手机来控制汽车状态并且获取车上相关信息。对该系统进行了调试,调试结果表明,该系统信息传输稳定,界面友好,实现了手机对汽车的智能控制。     

基于MSP430单片机的智能防盗系统

基于MSP430单片机智能防盗系统是一款以MSP430单片机为控制核心的智能防盗系统。该系统主要是由控制模块、GSM模块、蓝牙模块以及电源四部分组成。系统防盗效果主要体现在系统蓝牙与用户手机蓝牙的配对,若是配对成功则可以成功监测系统发送到手机的信息或者电话。经验证,该系统具有应用广泛、便携、超低功耗、实用性强、保密性好等优点。     

面向通用远程控制的新蓝牙标准

蓝牙技术联盟（SIG）即将发布的蓝牙低功耗规范将满足消费产品行业对通信交互式远程控制的需求。蓝牙低功耗技术将支持低成本、超低功耗应用,目前正在开发当中．预计于明年发布。     

一种新兴的蓝牙技术——超低功耗蓝牙技术

文章介绍了一种功耗比标准蓝牙更低的超低功耗蓝牙技术,描述了这种技术的由来、协议栈构成、拓扑结构、Radio层的工作状态和工作角色以及特点。在技术特点部分中,详细介绍了超低功耗蓝牙技术实现低功耗的原理,并且给出了它与标准蓝牙技术的参数相对比的表格。     

安捷伦推出用于无线连通性测试仪的蓝牙低功耗射频测试选件

安捷伦科技日前宣布推出蓝牙低功耗测试选件,以帮助器件和模块制造商使用N40IOA无线连通性测试仪进行测试。AgilentN4010A测试仪结合蓝牙低功耗发射／接收选件,可为制造商和设计部门的蓝牙低功耗应用提供可靠高效的测试解决方案。最新测试解决方案可帮助加快产品开发速度,缩短实现量产的时间。     

蓝牙技术联盟即将推出面向通用远程控制的新蓝牙标准

蓝牙技术联盟（SIG）日前宣布,即将发布的蓝牙低功耗规范将满足消费产品行业对通信交互式远程控制的需求。蓝牙低功耗技术将支持低成本、超低功耗应用,目前正在开发当中,预计于明年发布。蓝牙低功耗技术专门设计用于需要超长电池寿命（数年而不是数小时）的设备,面向需要在不同厂商的产品间实现交互的人群。这些特性使蓝牙低功耗技术非常适用于远程控制设备。     

Microchip推出RN4020蓝牙智能模块

美国微芯科技公司（Microchip）近日宣布推出公司首款蓝牙4．1低功耗模块。RN4020基于Microchip在传统蓝牙技术方面积累的深厚经验研发而成,新模块通过了全球法规认证以及蓝牙技术联盟（SIG）的认证。集成的蓝牙低功耗（BTLE）协议栈以及对通用SIG低功耗配置文件的板载支持既加速了产品的上市时间,也确保了蓝牙技术的兼容性,在免除高昂认证费用的同时还降低了开发风险。     

基于Android蓝牙通信的交通控制系统研究

利用蓝牙移动通信终端和蓝牙模块之间低功耗、低成本的无线通信方式,设计一个基于Android蓝牙通信的交通控制系统。通过在Android系统的手机安装上编好的App,然后与交通信号机里面的蓝牙模块配对来对交通灯进行控制。使用Android系统编写上位机软件,实现了Android上位机与ARM下位机的串口通信,并对交通灯控制系统进行现场控制。实验结果表明,信号稳定,数据传递正确。     

蓝牙低功耗规范将发布

蓝牙技术联盟（SIG）近日宣布,即将发布的蓝牙低功耗规范将满足消费产品行业对通信交互式远程控制的需求。蓝牙低功耗技术将支持低成本、超低功耗应用,目前正在开发当中,预计于明年发布。该标准可以支持厂商将遥控器设计成为低成本、非智能的外设。无论是电视、DVD播放器、机顶盒或多媒体播放器,这些目标接收产品都能够控制遥控器的操作,因此其可以与新购买的任何设备兼容。     

德州仪器推出业界集成GPS、蓝牙与FM技术的单芯片

4月9日,德州仪器（TI）宣布推出业界首款集成A-GPS、蓝牙2.1、超低功耗技术以及FM收发功能的单芯片解决方案NaviLink 6.0——NL5500,该器件可满足移动手持终端消费者对GPS、蓝牙无线技术以及FM无线电日益增长的需求。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

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.     

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.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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