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Before I can present design concepts or tactical WIRELESS communications and network challenges, I feel the need to mention the challenges of writing for a field where some information is not available for public domain and cannot be included in this book’s context. Another challenge is the use of military jargon and the extensive number of abbreviations (and abbreviations of abbreviations!) in the field. Engineering books are naturally dry, and I have attempted to make it light by presenting the concepts in layman’s terms before diving into the technical details. I am structuring this book in such a way as to make it useful for a specialized graduate course in tactical communications and networking, or as a reference book in the field.
標(biāo)簽： Communications Tactical Networks WIRELESS and
上傳時間： 2020-06-01
上傳用戶：shancjb
The use of mobile devices now surpasses that of traditional computers: WIRELESS users will hence soon be demanding the same rich multimedia services on their mobile devices that they have on their desktop personal computers. In addition, new services will be added, especially related with their mobile needs, such as location-based information services.
標(biāo)簽： Communications Technology WIRELESS Trends in
上傳時間： 2020-06-01
上傳用戶：shancjb
When thinking about mobile radio engineers there is a tendency to assume that the engineering function relates solely to the technical aspects of the network, such as the equipment design or the network design. That is certainly a key part of the role of a mobile radio engineer. However,increasinglyengineersarerequiredtointeractwithprofession- als from other divisions. The “complete WIRELESS professional” should know about mobile networks; fixed networks; other types of mobile systems; regulatory and government policy; the requirements of the users; and financial, legal, and marketing issues.
標(biāo)簽： Communications Complete WIRELESS The
上傳時間： 2020-06-01
上傳用戶：shancjb
Once upon a time, cellular WIRELESS networks provided two basic services: voice telephony and low-rate text messaging. Users in the network were separated by orthogonal multiple access schemes, and cells by generous frequency reuse patterns [1]. Since then, the proliferation of WIRELESS services, fierce competition, andthe emergenceof new service classes such as WIRELESS data and multimediahave resulted in an ever increasing pressure on network operators to use resources in a moreefficient manner.In the contextof WIRELESS networks,two of the most common resources are power and spectrum—and, due to regulations, these resources are typically scarce. Hence, in contrast to wired networks, overprovisioning is not feasible in WIRELESS networks.
標(biāo)簽： Maximization Nonconvex WIRELESS Utility Systems in
上傳時間： 2020-06-01
上傳用戶：shancjb
Welcome to the world of WIRELESS communications and the logical extension to the broadband architectures that are emerging as the future of the industry. No aspect of communications will be untouched by the WIRELESS interfaces;no part of our working environment will be left untouched either. As the world changes and the newer technologies emerge, we can expect to see more in the line of untethered communications than in the wired inter- faces.
標(biāo)簽： Broadband WIRELESS Handbook
上傳時間： 2020-06-01
上傳用戶：shancjb
This is a book on WIRELESS communication. That usually means communica- tion by radio, though ultrasound and infrared light are also used occasion- ally. The term “WIRELESS” has come to mean nonbroadcast communication, usually between individuals who very often use portable or mobile equip- ment. The term is rather vague, of course, and there are certainly borderline applications that are called WIRELESS without falling exactly into the above definition.
標(biāo)簽： Communication Technology WIRELESS
上傳時間： 2020-06-01
上傳用戶：shancjb
n the first part of this book, we give an introduction to the basic applications of WIRELESS com- munications, as well as the technical problems inherent in this communication paradigm. After a brief history of WIRELESS, Chapter 1 describes the different types of WIRELESS services, and works out their fundamental differences. The subsequent Section 1.3 looks at the same problem from a different angle: what data rates, ranges, etc., occur in practical systems, and especially, what combination of performance measures are demanded (e.g., what data rates need to be transmitted over short distances; what data rates are required over long distances?) Chapter 2 then describes the technical challenges of communicating without wires, putting special emphasis on fading and co-channel interference. Chapter 3 describes the most elementary problem of designing a WIRELESS system, namely to set up a link budget in either a noise-limited or an interference-limited system. After studying this part of the book, the reader should have an overview of different types of WIRELESS services, and understand the technical challenges involved in each of them. The solutions to those challenges are described in the later parts of this book.
標(biāo)簽： Communications WIRELESS Edition 2nd
上傳時間： 2020-06-01
上傳用戶：shancjb
During the past three decades, the world has seen signifi cant changes in the telecom- munications industry. There has been rapid growth in WIRELESS communications, as seen by large expansion in mobile systems. WIRELESS communications have moved from fi rst-generation (1G) systems primarily focused on voice communications to third-generation (3G) systems dealing with Internet connectivity and multi-media applications. The fourth-generation (4G) systems will be designed to connect wire- less personal area networks (WPANs), WIRELESS local area networks (WLANs) and WIRELESS wide-area networks (WWANs).
標(biāo)簽： Communications Networking WIRELESS
上傳時間： 2020-06-01
上傳用戶：shancjb
Although the origins of radio frequency based WIRELESS networking can be traced back to the University of Hawaii’s ALOHANET research project in the 1970s, the key events that led to WIRELESS networking becoming one of the fastest growing technologies of the early 21st century have been the ratification of the IEEE 802.11 standard in 1997, and the subsequent development of interoperability certification by the Wi-Fi Alliance (formerly WECA).
標(biāo)簽： Networking Technology WIRELESS
上傳時間： 2020-06-01
上傳用戶：shancjb
WIRELESS networking is undergoing a transformation from what has been primarily a medium for supporting voice traffic between telephones, into what is increasingly becoming a medium for supporting traffic among a variety of digital devices transmitting media of many types (voice, data, images, video. etc.) Wireline networking underwent a similar transformation in the 1990s, which led to an enormous build-up in the capacity of such networks, primarily through the addition of new optical fiber, switches and other infrastructure.
標(biāo)簽： Multiusers Detection WIRELESS Networks
上傳時間： 2020-06-01
上傳用戶：shancjb
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