Home > Communications-Protocols > Wireless Connectivity


Topic under  Wireless Connectivity
Source: ee.sharif.edu 
File size: 3.4M
File type: pdf
Last download on: Sat Jul 15, 2017 02:09:46 AM
Short Desciption:
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.

Overview ofWireless Communications 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. In addition, wireless local area networks currently supplement or replace wired networks in many homes, businesses, and campuses. Many new applications, including wireless sensor networks, automated highways and factories, smart homes and appliances, and remote telemedicine, are emerging from research ideas to concrete systems. The explosive growth of wireless systems coupled with the proliferation of laptop and palmtop computers indicate a bright future for wireless networks, both as stand-alone systems and as part of the larger networking infrastructure. However, many technical challenges remain in designing robust wireless networks that deliver the performance necessary to support emerging applications. In this introductory chapter we will briefly review the history of wireless networks, from the smoke signals of the pre-industrial age to the cellular, satellite, and other wireless networks of today. We then discuss the wireless vision in more detail, including the technical challenges that must be overcome to make this vision a reality. We describe current wireless systems along with emerging systems and standards. The gap between current and emerging systems and the vision for future wireless applications indicates that much work remains to be done to make this vision a reality.
Bookmark or share this info on Google+ and leave comment at below :

Bookmark and Share

People who downloaded this also viewed in this sites:

Fundamentals 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,...

Data Networks Flow Control
Second Edition Data Networks DIMITRI BERTSEKAS Massachusetts Institute of Technology ROBERT GALLAGER Massachusetts Institute of Technology, 6.1...

Mobile Wireless Communications
Mobile Wireless Communications Mischa Schwartz Department of Electrical Engineering Columbia University, This book, designed as an introductory...

    Leave comment :



    Related Free Files

    Introduction and Layered Network... - Download: 208 times
    Algorithms For Wireless Sensor Networks... - Download: 96 times
    Introduction to Wireless Communication... - Download: 353 times
    Principles of Digital Communication... - Download: 488 times
    Point-to-Point Protocols and Links... - Download: 171 times
    Mobile Networks Tutorial... - Download: 102 times
    Data Networks Flow Control... - Download: 183 times
    Energy and Utility Optimization in Wireless... - Download: 129 times
    Fundamentals of Wireless Communication... - Download: 337 times
    Multiaccess Communication... - Download: 100 times

    eXTReMe Tracker