wireless communication system and network notes

... Report 7884 National institute of Stondords and Technology US Deportment of Commerce Trang 2‘System and Network Security Acronyms terageney Report 7881 and Abbreviations er 209 Karen Scarfone ... Insite of Stands and Technolgy Gaithersburg, MD 20899-9931 Trang 3Reports on Computer Systems Technology The Information Technology Laboratory (TL) atthe National fstiate of Standards and Technoloxy ... a so requemily used acronyms and abbreviations The list docs not nel all, Sssem and network swat teen, tor ita compen of every atonym an seston Foard i stem and network security dncuments published

Ngày tải lên: 24/02/2014, 04:20

... Trang 2The Practice of System and Network AdministrationSecond Edition Trang 3This page intentionally left blank Trang 4The Practice of Systemand Network Administration Second Edition ... communication leaves people cerned and annoyed Communication also includes documentation.Documentation makes systems easier to support, maintain, and con-upgrade Good communication and proper documentation ... companies, andlarge multinational hardware and software companies On the technical side,she focused on security and networking, working with customers and helpingGNAC establish its data center and Internet

Ngày tải lên: 14/08/2014, 14:20

... Servicesmethod of easing support and maintenance for a service is to use standardhardware, standard software, and standard configurations and to have doc-umentation in a standard location Centralizing ... systems are load sharing Both systems are fully operational and both share in the service workload Each server has enoughcapacity to handle the entire service workload of the other When one systemfails, ... is common to have a separate networkfor backups and monitoring Backups use significant amounts of bandwidthwhen they run, and separating that traffic from the main network means thatbackups won’t

Ngày tải lên: 14/08/2014, 14:20

... your network puts you in control of it Not understanding the networkputs you at the mercy of its vagaries A clean architecture encompasses both physical- and logical-networktopologies and the network ... your power and HVAC systems, among other things Forthis sort of design, you need to understand circuit diagrams and buildingblueprints and consult with the people who are designing the system to ... inLANs and campus-area networks and are sometimes useful for WANs In aring topology, each network entity—piece of network hardware, building, orsite—is connected to two others so that the network

Ngày tải lên: 14/08/2014, 14:20

... consent and supervision of the telecom or networking group and instituted regular physical checks of all computer and communications rooms and the wiring between them. 11.1.4 Management and Organizational ... example, an email system that sends and receivesemail is not as complex as one that also stores address books and notesand perhaps has a built-in calendar service The more basic email systemcan be ... rest of your network infrastructure? – Will it use your existing authentication system? – What kind of load does it put on the network and other key systems?– If it has to talk to other systems or

Ngày tải lên: 14/08/2014, 14:20

... However, as systems and networks grow and become morecomplicated, it becomes impossible for a single person to understand, main-tain, and run the entire network As a system grows, handoffs become ... Understanding of the System Finally, the ultimate debugging icing is to have at least one person who stands, end to end, how the system works On a small system, that’s easy Assystems grow larger and ... programs is very tricky, and mistakes can turn into security holes Systems such assudo (Snyder, Miller et al 1986) let you manage SUID privilege on a per user and per command basis and have been analyzed

Ngày tải lên: 14/08/2014, 14:20

... many case studies (Epp and Baines 1992;Ondishko 1989; Schafer 1992b; and Schwartz, Cottrell, and Dart 1994).Harlander (1994) and Miller and Morris (1996) describe useful tools and thelessons learned ... service and needing continuous access to its systems to meet its contracts Internet services, remote access, globalnetworks, and new-business pressure reduce the likelihood that a full andcomplete ... worse.Security is important for monitoring systems • Within a local area network, network bandwidth is not usually a sig-nificant percentage However, over low-bandwidth—usually distance—connections,

Ngày tải lên: 14/08/2014, 14:20

... such as CPUand memory, might also be needed If you have planned to expand by acquir-ing whole new systems, such as stand-alone network storage arrays, be sure to include spares for those systems ... establish hardware standards for storageand file servers Make yourself available to recommend systems and to workwith your customers to identify potential candidates for standards This strategy ... reliability and performancerequired for specific applications Understanding the basic relationship ofstorage devices to the operating system and to the file system gives you aricher understanding

Ngày tải lên: 14/08/2014, 14:21

... 721some kind of native authentication system that handles its own usernameand password system However, well-designed systems can be configured toswitch that off and simply use the preauthenticated ... hijacked sites and bandwidth include distributingpirated software (“warez”), generating advertising email (“spam”), launchingautomated systems to try to compromise other systems, and even competingwith ... on the operating system volved, intruders can access privileged data without a password, andcan create privileged database or system accounts or even run arbi-trary system commands The intruder

Ngày tải lên: 14/08/2014, 14:21

... is delegation System administration is about trolling machines and networks, but delegation is about letting go of controland letting others be in control They are opposing skills, and therefore ... get it Try to understand where hisconfusion lies and how he is thinking, and then approach your teachingfrom that point of view Always try your best and assume that you have acommunication problem ... they are at fault Only byunderstanding and appreciating their mistakes will they be able to improve.When you reprimand someone, do so face to face, and be timely andspecific about the behavior

Ngày tải lên: 14/08/2014, 14:21

... distribution, the current brand of computers, amount of bandwidth, and type of network topology The Staller doesn’t see the lack of technology refresh and the problems that it ... administrative systems did you have to touch? 3. What improvements to your system could make it easier to disable your access when you are fired? 4. A system like Tripwire causes periodic points of filesystem ... planning and deployment of such a system? How is this different for a file server, an e-commerce server, and a database server? Epilogue We began this book asking for a concise definition of system

Ngày tải lên: 14/08/2014, 14:21

... Department of Computer Science and Engineering, Wright State University, 2009 Trusted Querying over Wireless Sensor Networks and Network Security Visualization Wireless sensor networks (WSNs) as an emerging ... Bin Wang for his tremendous help and support throughout my stay at the Broadband, Mobile and Wireless Networking Research Laboratory at Wright State University and for the persisting positive ... B2 and C Node B1 and node B2 observe the behavior of node C and both establish direct trust in C with trust values Trang 36T 1 and rAB T 1 through the recommender node B1 and from d C B AC T and

Ngày tải lên: 30/10/2014, 20:14

... Optical Wireless Communications System and Channel Modelling with MATLAB® Ay Z Ghassemlooy W Popoola S Rajbhandari Trang 3Optical Wireless Communications Trang 5Optical Wireless Communications ... site at http://www.taylorandfrancis.com Trang 7Dedicated to Azar, Odunayo and KanchanTrang 9Contents Chpter 1 Introduction: Optical Wireless Communication Systems Wireless Access Scheme: ... communications : system and channel modelling with MATLAB / Z Ghassemlooy, W Popoola, S Rajbhandari p.em Includes bibliographical references and index ISBN 978-1-4398-5188-3 (hardback) 1 Optical communications

Ngày tải lên: 22/10/2022, 08:10

... Trang 1HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY SCHOOL OF ELECTRICAL AND ELECTRONIC ENGINEERING PROJECTS Wireless Communication TOPICS: Design and Simulation Direct Conversion Receiver ... integration 4 Simulation In this section, we simulate a wireless communication system with Transmitter and Receiver using Matlab Simulink System design specifications: Data Rate: 250 kbps OQPSK ... (ADC) with 10 bits and 0 dBm saturation power 4.1 Design and Verify baseband transmitter To design baseband transmitter, first we need Bernoulli Binary Generator to generate random binary numbers

Ngày tải lên: 17/06/2024, 17:24

... TRUYEN THONG KHONG DAY MIMO-OFDM (Research on applying deep learning on the MIMO-OFDM wireless communication system) LUAN VAN THAC Si NGANH CONG NGHE THONG TIN MA SO: 8480201 NGƯỜI HƯỚNG DAN KHOA ... Artificial intelligence DL Deep learning CNN Convolutional neural network DCNN Deep convolutional neural network DNN Deep neural network AWGN Additive white Gaussian noise FPGA Field-programmable ... máy học vào mạng không dây - MIMO-OFDM (Research on application of deep learning in wireless communication systems — MIMO- OFDM) 1.2 Mục tiêu dé tài Xuất phát từ các kết quả nghiên cứu ứng dụng

Ngày tải lên: 24/11/2024, 14:44

... Hand off xảy ra Thường thì ∆ = 1 ~ 6 dB  Khi MS di chuyển sang một Cell khác (thuộc MSC khác)  gọi là Intersystem Hand Off Trang 21Handoff RegionTrang 22 Các dạng Hand-off cơ bảnScope of Hand-off: ... BTS, tìm kiếm TB được gọi và kết nối với TB này. MSC Trang 19 Khái niệm Hand-off Yêu cầu và đặc điểm của Hand-Off:  Hand Off đảm bảo cuộc gọi liên tục khi MS di chuyển từ Cell này sang Cell ...  Yêu cầu cho Hand Off luôn cao hơn yêu cầu thiết lập cuộc gọi.  Hand Off không được nhận biết bởi người sử dụng.  Mức công suất thu tối ưu tại BTS được chỉ định để tiến hành Hand-off, thường:

Ngày tải lên: 01/08/2015, 20:29

... Management System for Heterogeneous Wireless Sensor Networks Master of Science QUN YU 07/23/2010 Trang 3DESIGN AND IMPLEMENTATION OF WEB-BASED DATA AND NETWORK MANAGEMENT SYSTEM FOR HETEROGENEOUS WIRELESS ... Heterogeneous Wireless Sensor Networks Management System MSA Management Service and Application Trang 12VCAS Virtual Command Attributes Set VCC Virtual Command Category VCS Virtual Command Set VCSMM ... Implementation of Web-based Data and Network Management System for Heterogeneous Wireless Sensor Networks Major Professor: Yao Liang Today, Wireless Sensor Networks (WSNs) are forming an exciting

Ngày tải lên: 24/08/2014, 10:50

... filter (the linear system), and the PF is the preliminary filter (the linear system) A detailed discussion of the AF and PF can be found in [2, pages 233–243 and 264– 284] and [5] Consider briefly ... PF and AF outputs If the Gaussian noise n(t) comes in at the AF and PF inputs (the GR linear system front end), the noise forming at the AF and PF outputs is Gaussian, too, because the AF and ... Research Article Signal Processing by Generalized Receiver in DS-CDMA Wireless Communication Systems with Optimal Combining and Partial Cancellation Vyacheslav Tuzlukov School of Electronics Engineering,

Ngày tải lên: 21/06/2014, 05:20

... and {gn} be sequences in L ρ , and let {αn} and {βn} be sequences in 0, ∞ converging to 0, and f, g, h ∈ Lρ Then the following hold: 1 if pfn , g  ≤ αn and p fn , h  ≤ βn , for all n ... Husain and Tarafdar13 introduced the notion of a nonexpansive-type multivalued map and proved a fixed point theorem on compact intervals of the real line Using such type of notions Husain and ... that 0 < ρKn < ∞ and Ω  K n It is easy to see that the functional Trang 3ρ : M → 0, ∞ is a modular and satisfies the following properties:i ρf  0 if and only if f  0 ρ-a.e.,

Ngày tải lên: 21/06/2014, 20:20

... state-of-the-art radio propagation and channel models for wireless multiple-input multiple-output (MIMO) systems We distinguish between physical models and analytical models and discuss popular examples ... configuration, system bandwidth, or pulse shaping 1.3.2 MIMO channel In contrast to conventional communication systems with one transmit and one receive antenna, MIMO systems are equipped with ... described for all transmit and receive antenna pairs Let us consider ann × m MIMO system, where m and n are the number of transmit and receive antennas, respectively From a system level perspective,

Ngày tải lên: 22/06/2014, 22:20