Xem 1-20 trên 141 kết quả Transmission technology
  • Principle of CDMA - Frequency allocation - Principle of DS­CDMA - Transmit power control Basic W­CDMA Transmission Technologies - Two­layer spreading code assignment - Inter­BS asynchronous mode Characteristics of W­CDMA - Statistical Multiplexing effect - MS stand­by time - Coherent RAKE reception (RAKE time diversity) 3G Roll Out Plan - FOMA service content - 3G Roll out plan

    ppt20p donghoadequan 27-07-2013 26 5   Download

  • (Dùng cho sinh viên hệ đào tạo đại học từ xa) UNIT 1 Exercise 1. Read the following passage then answer the questions. ANALOGUE AND DIGITAL NETWORKS Digital technology in the telephone network is nothing new. Take all the relays in older exchanges as an example. Relays are either "off" or "on", and there is no state in between these. Suitable combinations of relays could build up and "remember" numbers - perhaps a far-fetched example, but in was digital, so it will serve!...

    pdf86p nguyethap 27-03-2013 86 43   Download

  • AD HOC NETWORKS: Technologies and Protocols is a concise in-depth treatment of various constituent components of ad hoc network protocols. It reviews issues related to medium access control, scalable routing, group communications, use of directional/smart antennas, network security, and power management among other topics. The authors examine various technologies that may aid ad hoc networking including the presence of an ability to tune transmission power levels or the deployment of sophisticated smart antennae. ...

    pdf295p ken333 06-07-2012 83 30   Download

  • Ultra-Wideband Radio (UWB) earmarks a new radio access philosophy and exploits several GHz of bandwidth. It promises high data rate communication over short distances as well as innovative radar sensing and localization applications with unprecedented resolution. Fields of application may be found, among others, in industry, civil engineering, surveillance and exploration, for security and safety measures, and even for medicine.

    pdf512p haiduong_1 15-04-2013 53 17   Download

  • "Energy for a Warming World" challenges the commonplace notion that the amount of power which mankind can potentially harness from renewable resources is more than large enough to assuage future demand levels. By examining the renewable issue from an electrical engineering perspective, and exercising due regard for the limited capability of current and future electrical generation and transmission systems, this book attempts to provide more realistic statistics for the levels of power which could be extracted from sustainable resources in the critical time frame of 30 to 40 years....

    pdf187p ktct_1669 08-05-2012 71 14   Download

  • An open data communication protocol developed in 1979 Published by Modicon Open structure Flexible Widely known Supplied by many SCADA and HMI software Have OPC Servers 2 serial transmission modes: ASCII 10 bits RTU (Binary) 11 bits Communication interface RS-232/485 Ethernet (TCP/IP) Station Device: 0 ~ 255 Digital input 1xxxx: 4 digits for hexadecimal address (0000 ~ FFFF) 1xxxxx: 5 digital for decimal address (0 ~ 65535) Digital output 0xxxx: 4 digits for hexadecimal address (0000 ~ FFFF) 0xxxxx: 5 digital for decimal address (0 ~ 65535) Analog input 4xxxx: 4 dig...

    ppt14p buisontdtq 04-10-2012 44 13   Download

  • Most antenna engineers are likely to believe that antennas are one technology that is more or less impervious to the rapidly advancing semiconductor industry. However, as demonstrated in this lecture, there is a way to incorporate active components into an antenna and transform it into a new kind of radiating structure that can take advantage of the latest advances in analog circuit design

    pdf53p beobobeo 01-08-2012 34 6   Download

  • This book has been prepared to present the state of the art on WiMAX Technology. The focus of the book is the physical layer, and it collects the contributions of many important researchers around the world. So many different works on WiMAX show the great worldwide importance of WiMAX as a wireless broadband access technology.

    pdf0p cucdai_1 16-10-2012 19 4   Download

  • The SAS In-Database technology described in this paper relates to a variety of environments, including grid, blade servers, and event management containers. The focus here is on its application to database management systems. The goal of the SAS In-Database initiative is not only to achieve deeper technical integration with database providers, but to also extend this integration to a unique and differentiated value proposition that blends the best SAS data integration and analytics with the core strengths of databases.

    pdf12p yasuyidol 02-04-2013 25 4   Download

  • Ultra wideband (UWB) communication systems are characterized by high data rates, low cost, multipath immunity, and low power transmission. They are widely used in wireless communications, networking, radar, imaging, and positioning systems. In 2002, the Federal Communication Commission (FCC) legalized low power UWB emission between 3.1 GHz and 10.6 GHz for indoor communication devices stimulating many novel UWB applications such as personal area networks (PANs), accurate tracking and location, safety and homeland security....

    pdf0p ktcn_1 10-07-2012 20 3   Download

  • Tham khảo tài liệu 'fe no.4 network and database technologies', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf0p janeeyre_thanh 20-09-2013 18 2   Download

  • Outline of Broadcasting Technology, Program Production and Transmission, Broadcasting and Signal Reception, Broadcasting and Signal Reception, Research and Development as the main contents of the document "Broadcasting Technology". Invite you to consult.

    pdf0p kinhadthu 16-12-2015 3 2   Download

  • Hello, in this module we are going to discuss wireless networking. Specifically, we'll take a look at how wireless technology works, how it is commonly deployed, and the security issues associated with using it. Because wireless communications can penetrate opaque objects such as buildings, the risk of someone accessing a private network increases markedly. With wireless, an attacker does not need to gain access to physical cables or jacks, but only needs to have an antenna and be within range of the transmissions....

    pdf40p huyhoang 07-08-2009 144 71   Download

  • ATM is a packet-switched technology based on a 53-byte packet called a cell. Each cell is divided into a 5-byte header and a 48-byte payload. The short, fixed length cell reduces delay and jitter, allowing time sensitive information such as voice and video to be transported along with data. There are various transmission media and rates available with bandwidth measured in megabits to gigabits.

    pdf44p emilynguyen 08-08-2009 144 61   Download

  • A transmission or gearbox provides speed and torque conversions from a rotating power source to another device using gear ratios, including for a motor vehicle partly because of the limitations of internal combustion engines.Usually found near motors of some sort, gearboxes are used to reduce the load on the motor by using the motor's own momentum to keep it turning.

    ppt71p thanhgiang094 10-05-2011 79 38   Download

  • This chapter describes the basic characteristics of the distributed input/output system: • Central control by a master • High data throughput with a simple transmission protocol • Cyclic transmission of the process image in the input/output direction • Simple, cost-effective attachment • Data transmission via twisted pair (RS 485) or optical fiber

    pdf214p phuongtuongphu 25-02-2010 106 32   Download

  • Data communications and networking are changing the way we do business and the way we live. Business decisions have to be made ever more quickly, and the decision makers require immediate access to accurate information. Why wait a week for that report from Germany to arrive by mail when it could appear almost instantaneously through computer networks? Businesses today rely on computer networks and internetworks.

    pdf1171p hoangchung_dtvt 10-12-2012 69 28   Download

  • the world. First published in 1995, it has been adopted by more than half of all countries in the world. Since the publication of the DVB-T standard, however, research in transmission technology has continued, and new options for modulating and error-protecting broadcast steams have been developed. Simultaneously, the demand for broadcasting frequency spectrum has increased as has the pressure to release broadcast spectrum for non-broadcast applications, making it is ever more necessary to maximise spectrum efficiency....

    pdf25p khinhkha 26-07-2010 78 24   Download

  • With some 200 million hosts generating traffic on the Internet, TCP/IP (transmission control protocol/Internet protocol) has become the protocol suite of choice to support the exchange of messages in commercial operations and residential activities. This hands-on resource provides professionals with a comprehensive picture of the Internet protocol stack and the role of TCP/IP in data communication. It serves as a detailed guide to the protocols, networks, codes, signals, and equipment that make it possible to communicate using TCP/IP.

    pdf275p ken333 06-07-2012 59 18   Download

  • This volume, derived from the Handbook of Engineering Electromagnetics (2004), is intended as a desk reference for the fundamentals of engineering electromagnetics. Because electromagnetics provides the underpinnings for many technological fields such as wireless communications, fiber optics, microwave engineering, radar, electromagnetic compatibility, material science, and biomedicine, there is a great deal of interest and need for training in the concepts of engineering electromagnetics.

    pdf394p gian_anh 18-10-2012 39 17   Download

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