Digital wireless

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  • Four laws, two each from the natural sciences and the social sciences, have formed the basis for the development of digital wireless communication networks. This essay describes their interaction, as well as their logical support for spread - spectrum multiple - access techniques.

    pdf426p phongthinh 04-08-2009 316 194   Download

  • Practical Digital Wireless Signals Do you need to know what signal type to select for a wireless application? Quickly develop a useful expertise in digital modulation with this practical guide, based on the author’s experience of over 30 years in industrial design. You will understand the physical meaning behind the mathematics of wireless signals and learn the intricacies and tradeoffs in signal selection and design.

    pdf0p aries23 29-09-2012 40 13   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 29 12   Download

  • Over the last ten years, the impact of wireless communications on the way we live and do business has been surpassed only by the impact of the Internet. Cell phones, pagers, and wireless Personal Digital Assistants (PDAs) have become so commonplace in our lives that it is easy to forget that ten years ago, they were a rarity.

    pdf409p mylinh 11-08-2009 119 57   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 83 43   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 54 20   Download

  • 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 102 18   Download

  • page 3 Review of Stochastic Processes and Random Variables. Review of Discrete-Time Signal Processing. Components of a Digital Communication System. OFDM WLAN Overview. Single Carrier Versus OFDM Comparison. Chap 2 - Synchronization. page 51 Timing Estimation. Frequency Synchronization. Channel Estimation. Clear Channel Assessment. Signal Quality. Chap 3 - Modulation and Coding

    pdf275p son2483 04-11-2010 79 16   Download

  • Wireless communications systems offer a great deal of flexibility for mobile users and represent a key component in future global personal communications. Local loop systems are envisaged to allow the integration of many services into a high-speed digital system which allows communication inside buildings and access to the external world. Wireless systems potentially offer unprecedented flexibility for home or office data communications systems and reduced overheads costs for both installation and equipment....

    pdf25p tienvovan 18-09-2010 44 4   Download

  • Phần 1 ADSL - Asymmetric Digital Subscriber Line, phần 2 Wireless LAN là những nội dung chính trong 2 phần của bài giảng bài 06 "ADSL & Wireless LAN". Mời các bạn cùng tham khảo nội dung bài giảng để có thêm tào liệu phục vụ nhu cầu học tập và nghiên cứu.

    pdf16p theanh180 11-09-2015 20 4   Download

  • The generic cellular communication system, shown in Fig.l, is an integrated network comprising a land base wire line telephone network and a composite wired-wireless network. The land base network is the traditional telephone system in which all telephone subscribers are connected to a central switching network, commonly known as PSTN (Public Switching Telephone Network). It is a digital switching system, providing: i) Switching, ii) Billing, iii) 911 dialing, iv)l-800 and 1-900 calling features, v)...

    pdf280p tailieuvip13 20-07-2012 32 2   Download

  • In this paper, we present the results of our implementation of elliptic curve cryptography (ECC) over the field GF (p) on an 80-MHz, 32-bit ARM microprocessor. We have produced a practical software library which supports variable length implementation of the elliptic curve digital signature algorithm (ECDSA).

    pdf14p dunglh2013 02-04-2014 16 1   Download

  • Ebook Advanced digital communications has contents: Reviewof signal processingand detection, transmission over linear time invariantchannels, wireless communications, connections to information theory, appendix.

    pdf242p bautroibinhyen20 06-03-2017 4 1   Download

  • Chapter 3: Wireless and mobile computing transmission fundamentals. The following will be discussed in this chapter: Signals for conveying information, analog and digital data transmission, channel capacity.

    ppt44p deja_vu7 10-05-2018 0 0   Download

  • The following will be discussed in this chapter: Signals for conveying information, time domain concepts, frequency domain concepts, relationship between data rate and bandwidth, analog and digital data transmission, analog and digital data, analog and digital signaling, analog and digital transmission, channel capacity, transmission media.

    ppt51p deja_vu7 10-05-2018 0 0   Download

  • The following will be discussed in this chapter: Where we stand on layers, data representation and signaling used, data encoding, reasons for choosing encoding schemes, factors involved, digital data to analog signal (ASK, FSK, PSK), analog data to digital signal.

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  • The following will be discussed in this chapter: Data representation, signaling, encoding techniques, digital data, digital signals (line coding), advantages of digital transmission, disadvantages of digital transmission, signal elements vs. data elements, data rate vs. signal rate (bit rate vs. baud rate/pulse rate/modulation rate), unipolar encoding,…

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  • The following will be discussed in this chapter: Differential encoding, modem functions, digital vs analog (advantages of digital over analog), binary amplitude shift keying (limitations), NRZ-L, QPSK Vs.OQPSK, QAM.

    ppt116p deja_vu7 10-05-2018 0 0   Download

  • The following will be discussed in this chapter: Digital communication system, channel coding, types of error control, why use error-correction coding, types of channel coding, requirement of CC and EC, channel En-De/Coding for wireless communication,...

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  • The following will be discussed in this chapter: Motivations, motivations - efficient and effective frequency allocation, software defined radio, block diagram of a digital radio system, digital radio system

    ppt68p deja_vu7 10-05-2018 1 0   Download

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