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Multiple access techniques

Xem 1-20 trên 30 kết quả Multiple access techniques
  • Wireless networks - Lecture 6: Multiple access techniques. The main topics covered in this chapter include: frequency division multiple access (FDMA); time division multiple access (TDMA); random access; random access methods in wireless networks; code division multiple access (CDMA);...

    ppt24p haoasakura 30-05-2022 7 3   Download

  • Lecture Microwave and Satellite Systems - Week 7: Multiple Access Techniques present the content: multiple access system, TDMA, TDMA frame structure, time division multiple access and ALOHA, FDMA, code division multiple access,...

    pdf32p bachdangky 06-09-2021 11 0   Download

  • Mobile edge computing is an emerging trend of cloud computing that enables terminal users, which have limited computing ability, to offload their tasks to the edge servers. In this paper, we study the performance of mobile edge computing system using non-orthogonal multiple access (NOMA) and radio frequency energy harvesting techniques.

    pdf9p viputrajaya2711 22-06-2020 9 0   Download

  • The present study was carried out in the 4 Districts of Manipur to access the level of role performance as perceived by the agricultural extension personnel (Assistant technology manager) in the revitalized extension system in Manipur. A purposive sampling technique was followed and statistical methods such as frequency, percentage, standard deviation, Pearson product moment coefficient of correlation and multiple regression analysis were used for analysing the data. Data were collected through personal interview method during the period of January 2018 to march 2018.

    pdf5p trinhthamhodang5 16-05-2020 17 0   Download

  • In distributed system data replication is needed in order to improve data availability and performance among replica and those replicas need to be periodically refreshed using some update propagation strategies because the data store may be physically distributed across multiple machines at multiple sites. Data availability means to provide data to requesting node. The key issue is to decide where, when and by whom replicas should be placed and mechanisms to use for keeping the replicas consistent. Replication is a way to enhance the performance of application that accesses the data.

    pdf6p quenchua2 18-12-2019 13 0   Download

  • Wireless Communications Principles and Practice - Chapter 1: Introduction to Wireless Communication Systems includes Components of score and References, Wireless Networking, Wireless Systems and Standards, Modulation Techniques for Mobile Radio.

    pdf66p maiyeumaiyeu25 16-12-2016 57 4   Download

  • The second edition of this accessible book provides readers with an introductory treatment of communication theory as applied to the transmission of information-bearing signals. While it covers analog communications, the emphasis is placed on digital technology. It begins by presenting the functional blocks that constitute the transmitter and receiver of a communication system. Readers will next learn about electrical noise and then progress to multiplexing and multiple access techniques.

    pdf537p hoconganh_9x 22-09-2014 72 12   Download

  • Time Division Multiple Access (TDMA) is the most prevalent wireless access system to date GSM, ANSI-136, EDGE, DECT, PHS, Tetra. Direct Sequence Code Division Multiple Access (DS-CDMA) became commercial only in the mid 90’s IS-95 (A,B, HDR,1x,3x,...), cdma-2000 (3GPP2), W-CDMA (3GPP)

    ppt81p nhq_khtn 07-11-2013 38 3   Download

  • You will understand the physical meaning behind the mathematics of wireless signals and learn the intricacies and tradeoffs in signal selection and design.

    pdf903p dangkhoa1612 18-05-2013 153 49   Download

  • Our technique determines per-application resource quo- tas in the database and storage caches, on the fly, in a transparent manner, with minimal changes to the DBMS, and no changes to existing interfaces between compo- nents. Towards this objective, we use an online perfor- mance estimation algorithm to dynamically determine the mapping between any given resource configuration setting and the corresponding application latency.

    pdf9p yasuyidol 02-04-2013 51 3   Download

  • The web in recent years has experienced an explosion in the number of devices users employ to access services. A single user may access a certain service using multiple devices. Most services allow clients to access the service through a broker. The client is then forced to interact with the service via this broker throughout the duration that it is using the service. If the broker fails, the client is denied servicing till such time that the failed broker recovers.

    pdf50p nhacchovina 22-03-2013 49 7   Download

  • The Data-over-Cable Service Interface Specification (DOCSIS)is an international standard developed by CableLabs, a non-profit research and development consortium for cable-related technologies. • DOCSIS specifies the OSI Layer 1 and Layer 2 requirements: Physical layer-For data signals that the cable operator can use, DOCSIS specifies the channel widths (bandwidths of each channel) as 200 kHz, 400 kHz, 800 kHz, 1.6 MHz, 3.2 MHz, and 6.4 MHz. DOCSIS also specifies modulation techniques (the way to use the RF signal to convey digital data).

    pdf47p mrdvad11 12-03-2013 128 52   Download

  • Information about the topology and link-level characteristics of a network is critical for many applications including network diagnostics and management. However, this information is not always directly accessible; subnetworks may not cooperate in releasing information and widespread local measurement can be prohibitively expensive. Network tomographic techniques obviate the need for network cooperation, but the majority assume probing from a single source, which imposes scalability limitations because sampling traffic is concentrated on network links close to the source.

    pdf13p doiroimavanchuadc 06-02-2013 37 4   Download

  • Attackers break into the web application by thinking like a programmer: identifying how the application is intended to work and determining shortcuts used to build the application. The hacker then attempts to interact with the application and its surrounding infrastructure in malicious ways simply by using the web browser or any of a large number of automatic hacker tools, such as CGI scanners and HTTP proxys.

    pdf10p doipassword 01-02-2013 41 3   Download

  • This report is the final product of a Committee on Earth Studies (CES) examination of technical and programmatic issues related to the integration of research and operational Earth observation satellite systems in the support of climate research (see Appendix A for the statement of task). In a brief letter report (“On Climate Change Research Measurements from NPOESS,” May 27, 1998), the committee provided an overview of the many scientific, technical, and programmatic issues associated with integrating the measurement responsibilities of research agencies with those of operational agencies.

    pdf99p mnemosyne75 02-02-2013 43 2   Download

  • SAP GRC Access Control SAP is the onliy vendor with a “Gartner recommends” rating in all technique categories (Static analysis, provisioning support, integrated provisioning workflow, transaction monitoring and emergency access) “…offers one of the strongest product sets in our analysis, comperhensively addressing all SoD issues across multiple SAP instances”

    pdf146p bongbong_hong 17-12-2012 77 6   Download

  • Wireless sensor networks promise an unprecedented fine-grained interface between the virtual and physical worlds. They are one of the most rapidly developing new information technologies, with applications in a wide range of fields including industrial process control, security and surveillance, environmental sensing, and structural health monitoring. This book is motivated by the urgent need to provide a comprehensive and organized survey of the field.

    pdf215p taurus23 02-08-2012 90 6   Download

  • Tham khảo sách 'resource management in satellite networks', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf348p 123859674 30-06-2012 93 19   Download

  • Enable many mobile users to share simultaneously radio spectrum. Provide for the sharing of channel capacity between a number of transmitters at different locations. Aim to share a channel between two or more signals in such way that each signal can be received without interference from another.

    ppt60p nhq_khtn 12-03-2011 53 7   Download

  • Bài giảng "Truyền thông không dây - Giới thiệu" do Đặng Lê Khoa biên soạn trình bày các nội dung về: Giới thiệu hệ thống DCS (Digital Communication system); kênh truyền (Channel); định dạng và điều chế dải gốc (Formatting & Baseband modulation); bộ cân bằng, phân tập, và đan xen (Equalization, Diversity & Interleaving); mã hóa kênh (Channel coding); điều chế đa sóng mang (Multicarrier modulation); các kỹ thuật đa truy cập (Multiple Access Techniques); giới thiệu một số chuẩn trong truyền thông không dây.

    ppt7p nhq_khtn 12-03-2011 302 55   Download

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