Home > Communications-Protocols > Wireless Connectivity


Topic under  Wireless Connectivity
Source: ee.sharif.edu 
File size: 3.4M
File type: pdf
Last download on: Tue Mar 13, 2018 01:20:40 PM
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:

Multiaccess Communication
The subnetworks considered thus far have consisted of nodes joined by point-to-point communication links. Each such link might consist physically of...

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 - Queing Data Networks
DATA NETWORKS Dimitri Bertsekas Robert Gallager Massachusetts Institute of Technology, Throughout the book, major concepts and principles are...

    Leave comment :



    Related Free Files

    Introduction to Wireless Communication... - Download: 355 times
    A Guide to Wireless Networking and... - Download: 81 times
    Fundamentals of Wireless Communication... - Download: 339 times
    Fundamentals of Wireless Communications... - Download: 478 times
    DATA NETWORKS - Queing Data Networks... - Download: 68 times
    Energy and Utility Optimization in Wireless... - Download: 131 times
    Mobile Wireless Communications... - Download: 873 times
    Introduction and Layered Network... - Download: 210 times
    Energy-efficient Wireless Sensor Network MAC... - Download: 121 times
    Wireless Networking in the Developing World... - Download: 82 times

    eXTReMe Tracker