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:

Algorithms For Wireless Sensor Networks
Abstract This paper reviews some of the recent advances in the development of algorithms for wireless sensor networks. We focus on sensor...

Wireless Networking in the Developing World
This book was created by a team of individuals who each, in their own field, are actively participating in the ever-expanding Internet by pushing its...

Energy 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...

    Leave comment :



    Related Free Files

    DATA NETWORKS - Queing Data Networks... - Download: 67 times
    Mobile Wireless Communications... - Download: 859 times
    Wireless Networking in the Developing World... - Download: 79 times
    Principles of Digital Communication... - Download: 488 times
    Energy and Utility Optimization in Wireless... - Download: 129 times
    Multiaccess Communication... - Download: 99 times
    Energy-efficient Wireless Sensor Network MAC... - Download: 120 times
    Data Networks Flow Control... - Download: 179 times
    Point-to-Point Protocols and Links... - Download: 171 times
    Introduction and Layered Network... - Download: 207 times

    eXTReMe Tracker