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 pdf fileFundamentals of Wireless Communications
Wireless communication is one of the most vibrant research areas in the communication Żeld today. While it has been a topic of study since the 60's, the past decade has seen a surge of research activities in the area. This is due to a con°uence of several factors. First is the explosive increase in demand for tetherless connectivity, driven so far mainly by cellular telephony but is expected to be soon eclipsed by wireless data applications.

File size: 4.147 MB, 646 pages
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Last download: Sat Mar 25, 2017 02:51:10 PM


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 pdf fileWIRELESS COMMUNICATIONS
WIRELESS COMMUNICATIONS Andrea Goldsmith Stanford University, 1.1 History ofWireless Communications The first wireless networks were developed in the Pre-industrial age. These systems transmitted information over line-of-sight distances (later extended by telescopes) using smoke signals, torch signaling, flashing mirrors, signal flares, or semaphore flags. An elaborate set of signal combinations was developed to convey complex messages with these rudimentary signals. Observation stations were built on hilltops and along roads to relay these messages over large distances.

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Last download: Sat Mar 25, 2017 02:51:11 PM


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 pdf filePrinciples of Digital Communication
Robert G. Gallager January 5, 2008, The digital communication industry is an enormous and rapidly growing industry, roughly comparable in size to the computer industry. The objective of this text is to study those aspects of digital communication systems that are unique to those systems. That is, rather than focusing on hardware and software for these systems, which is much like hardware and software for many other kinds of systems, we focus on the fundamental system aspects of modern digital communication.

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Last download: Sat Mar 25, 2017 02:51:12 PM


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 pdf fileEnergy and Utility Optimization in Wireless Networks with Random Access
In this paper an ad-hoc network is considered where there is no infrastructure and intermediate nodes send packets toward their destinations. It is common in such networks to use random access since random access algorithms are inherently distributed given that nodes themselves decide when to access the channel [1]. The main characteristic of random access is independent transmission of nodes.

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Last download: Sat Mar 25, 2017 02:51:13 PM


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 pdf fileMobile Wireless Communications
Mobile Wireless Communications Mischa Schwartz Department of Electrical Engineering Columbia University, This book, designed as an introductory textbook in wireless communication for courses at the Senior and first-year graduate level, as well as a self-study text for engineers, com-puter scientists, and other technical personnel, provides a basic introduction to this boom-ing field. A student or reader of the book should come away with a thorough grounding in the fundamental aspects of mobile wireless communication,

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Last download: Sat Mar 25, 2017 02:51:14 PM


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 pdf fileFundamentals of Wireless Communication
Fundamentals of Wireless Communication, 1 Introduction 12 1.1 Book Objective . 12 1.2 Wireless Systems 13 1.3 Book Outline 16 2 The Wireless Channel 21 2.1 Physical Modeling for Wireless Channels . 21 2.1.1 Free space, fixed transmitting and receive antennas . 23 2.1.2 Free space, moving antenna 24 2.1.3 Reflecting wall, fixed antenna . 25 2.1.4 Reflecting wall, moving antenna 27 2.1.5 Reflection from a Ground Plane 29 2.1.6 Power Decay with Distance and Shadowing 30 2.1.7 Moving Antenna, Multiple Reflectors . 31 2.2 Input/Output Model of the Wireless Channel 32 2.2.1 The Wireless Channel as a Linear Time-Varying System 32 2.2.2 Baseband Equivalent Model 34 2.2.3 A Discrete Time Baseband Model . 37 Discussion 2.1 Degrees of Freedom . 40 2.2.4 Additive White Noise 41

File size: 4.8 MB
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Last download: Sat Mar 25, 2017 02:51:15 PM


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 pdf fileIntroduction to Wireless Communication Systems
Wireless Communications, Second Edition is the definitive professional's overview of wireless communications technology and system design. Building on his classic first edition, Theodore S. Rappaport reviews virtually every important new wireless standard and technological development, including W-CDMA, cdma2000, UMTS, and UMC 136/EDGE; IEEE 802.11 and HIPERLAN WLANs; Bluetooth, LMDS, and more. Includes dozens of practical new examples, solved step by step.

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Last download: Sat Mar 25, 2017 02:51:15 PM


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 pdf fileData Networks Flow Control
Second Edition Data Networks DIMITRI BERTSEKAS Massachusetts Institute of Technology ROBERT GALLAGER Massachusetts Institute of Technology, 6.1 INTRODUCTION In most networks, there are circumstances in which the externally offered load is larger than can be handled even with optimal routing. Then, if no measures are taken to restrict the entrance of traffic into the network, queue sizes at bottleneck links will grow and packet delays will increase, possibly violating maximum delay specifications. Furthermore, as queue sizes grow indefinitely, the buffer space at some nodes may be exhausted. When this happens, some of the packets arriving at these nodes will have to be discarded and later retransmitted, thereby wasting communication resources.

File size: 1.7 MB
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Last download: Sat Mar 25, 2017 02:51:16 PM


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 pdf filePoint-to-Point Protocols and Links
This chapter first provides an introduction to the physical communication links that constitute the building blocks of data networks. The major focus of the chapter is then data link control (i.e., the point-to-point protocols needed to control the passage of data over a communication link). Finally, a number of point-to-point protocols at the network, transport, and physical layers are discussed. There are many similarities between the point-to-point protocols at these different layers, and it is desirable to discuss them together before addressing the more complex network-wide protocols for routing, flow control, and multiaccess control.

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Last download: Sat Mar 25, 2017 02:51:17 PM


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 pdf fileIntroduction and Layered Network Architecture
Primitive forms of data networks have a long history, including the smoke signals used by primitive societies, and certainly including nineteenth-century telegraphy. The messages in these systems were first manually encoded into strings of essentially binary symbols, and then manually transmitted and received. Where necessary, the messages were manually relayed at intermediate points.

File size: 1.46 MB
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Last download: Sat Mar 25, 2017 02:51:18 PM


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