Xem 1-20 trên 155 kết quả Community modules
  • This course is about a communication system which is used to transfer information from a source to a destination. Examples of communication systems are telephones, wireless data access, television and many others.How to transmit the information from a source to a destination. How to evaluate the quality of the received information. What kinds of design goals to consider for a specific application. How to trade-off between various parameters (such as bandwidth and power) due to the design limitations and goals.

    pdf30p huemanvdoc 23-11-2009 93 18   Download

  • Reference subjects of digital information in English and fully understandable. This book was written to be a textbook for seniors or first - year graduate students interested in electrical communication systems. The book departs from the usual formata in two major respects. First, the text does not cover analog or pulse modulation systems.

    pdf207p binhbut 22-08-2010 165 97   Download

  • This book provides a comprehensive introduction to the underlying theory, design techniques and analytical tools of wireless communications, focusing primarily on the core principles of wireless system design. The book begins with an overview of wireless systems and standards. The characteristics of the wireless channel are then described, including their fundamental capacity limits. Various modulation, coding, and signal processing schemes are then discussed in detail, including state-of-the-art adaptive modulation, multicarrier, spread spectrum, and multiple antenna techniques....

    pdf0p huemanvdoc 20-11-2009 156 50   Download

  • Wireless communications is, by any measure, the fastest growing segment of the communications industry. As such, it has captured the attention of the media and the imagination of the public. Cellular systems have experienced exponential growth over the last decade and there are currently around two billion users worldwide. Indeed, cellular phones have become a critical business tool and part of everyday life in most developed countries, and are rapidly supplanting antiquated wireline systems in many developing countries....

    pdf572p manhtoank10c 23-05-2013 50 20   Download

  • THE recent development of various methods of modulation such as PCM and PPM which exchange bandwidth for signal-to-noise ratio has intensified the interest in a general theory of communication. A basis for such a theory is contained in the important papers of Nyquist1 and Hartley2 on this subject. In the present paper we will extend the theory to include a number of new factors, in particular the effect of noise in the channel, and the savings possible due to the statistical structure of the original message and due to the nature of the final destination of the information....

    pdf55p toad_prince9x 30-09-2011 45 16   Download

  • This is an undergraduate course in digital communications, which is designed to prepare students for engineering work in high-tech industries and for graduate work in communications, signal processing, and computer systems. The course covers basic concepts and useful tools for design and performance analysis of transmitters and receivers in the physical layer of a communication system. Prerequisite: An introductory course in probability. A course in signals and systems. Texts: J.G. Proakis, M. Salehi, Communication Systems Engineering M. P. Fitz, A Course in Communication Theory Graders:...

    pdf141p ntnam113 23-05-2012 66 14   Download

  • Channel coding:Transforming signals to improve communications performance by increasing the robustness against channel impairments (noise, interference, fading, ..)

    pdf43p huemanvdoc 23-11-2009 60 12   Download

  • Scope of the course -Digital Communication systems -Practical information -Course material -Schedule -Staff - Communication is a process by which information is exchanged between individuals through a common system of symbols, signs, or behavior -Grading

    pdf25p huemanvdoc 23-11-2009 77 12   Download

  • This best-selling, easy to read book offers the most complete discussion on the theories and principles behind today's most advanced communications systems. Throughout, Haykin emphasizes the statistical underpinnings of communication theory in a complete and detailed manner. Readers are guided though topics ranging from pulse modulation and passband digital transmission to random processes and error-control coding. The fifth edition has also been revised to include an extensive treatment of digital communications....

    pdf384p beobobeo 01-08-2012 31 12   Download

  • Wireless communications is rapidly becoming one of the ubiquitous technological underpinnings of modern society (such as electric power, fossil fuels, automobiles, etc.). Few people think about the technology within their mobile phones, remote controls, garage door openers, GPS navigation devices, and so on. They are always at hand and reliably work for the user. Yet even within the electrical engineering (EE) community, radio communication techniques have a reputation as a “Black Art” that can only be successfully practiced by “RF people”. This is changing, albeit slowly.

    pdf445p namde04 03-05-2013 26 12   Download

  • The two fundamental building blocks of a digital communication system are modulation and channel coding. They enable reliable communication by providing signaling schemes and receiver structures that utilize the available spectrum and power efficiently.

    pdf38p huemanvdoc 23-11-2009 70 8   Download

  • Transforming the information source to a form compatible with a digital system. Sampling. Aliasing. Quantization Uniform and non-uniform. Baseband modulation. Binary pulse modulation. M-ary pulse modulation. M-PAM (M-ary Pulse amplitude modulation).Assuming real time transmission and equal energy per transmission data bit for binary-PAM and 4-ary PAM

    ppt22p doanhung_dtvtk10 24-03-2013 27 7   Download

  • [ Team LiB ] 4.2 Ports Ports provide the interface by which a module can communicate with its environment. For example, the input/output pins of an IC chip are its ports. The environment can interact with the module only through its ports.

    pdf7p sieukidvn 16-08-2010 36 6   Download

  • Communications is a process by which information is exchanged between individuals through a common system of symbols, signs, or behaviour “It is about communication between people; the rest is technology” Communication systems are reliable, economical and efficient means of communications Public switched telephone network (PSTN), mobile telephone communication (GSM, 3G, 4G...), broadcast radio or television, navigation systems, ... The course is aiming at introducing fundamental issues required for understanding and designing a (digital) communication system...

    ppt28p doanhung_dtvtk10 24-03-2013 37 6   Download

  • Important features of digital communication systems Some basic concepts and definitions such as as signal classification, spectral density, random process, linear systems and signal bandwidth.The first important step in any DCS: Transforming the information source to a form compatible with a digital syst

    ppt22p doanhung_dtvtk10 24-03-2013 30 6   Download

  • The Verilog HDL supports a hierarchical hardware description structure by allowing modules to be embedded within other modules. Higher level modules create instances of lower level modules and communicate with them through input, output, and bidirectional ports. These module input/output (I/O) ports can be scalar or vector.

    pdf24p vanlektmt 13-05-2011 30 5   Download

  • Cnet I/F System is used for communication between the main unit and external devices using RS-232C/RS-422 Interface. The K80S has a built-in RS-232C port and has also G7L-CUEB for RS-232C, G7L-CUEC for RS-422. It is possible to construct communications systems on demand. (10 points modules include RS-232C and RS-485 ports on the main module, and no external communication module is available)

    pdf0p beobobeo 01-08-2012 25 5   Download

  • Tham khảo bài thuyết trình 'module 3: working with local data', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    ppt30p ruavanguom 21-09-2012 20 5   Download

  • SugarCRM là một giải pháp dựa trên web của CRM được viết bằng PHP. SugarCRM có sẵn trong các flavour được gọi là Editions ("Community" – miễn phí, "Professional", và "Enterprise"). Để có cái nhìn tổng quan chi tiết về các editions khác, bạn có thể truy cập website của SugarCRM. Trong bài hướng dẫn sau đây chúng tôi trình bày cách cài đặt bản Community Edition miễn phí trên hệ thống Debian Squeeze hoặc Ubuntu 11.04 đã có nginx thay vì Apache.

    pdf21p phungnguyet_123 23-02-2013 25 5   Download

  • Another source of error due to filtering effect of the system: Intersymbol. interference (ISI) The techniques to reduce ISI. Pulse shaping to achieve zero ISI at the sampling time. Equalization to combat the filtering effect of the channel.Some bandpass modulation schemes used in DCS for transmitting information oer channel. MPAM, MPSK, MFSK, MQAM How to detect the transmitted information at the receiver. Coherent detection. Noncoherent detection.

    ppt27p doanhung_dtvtk10 24-03-2013 29 4   Download

Đồng bộ tài khoản