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Wireless communication is witnessing tremendous growth with great proliferation of different standards covering wide ,local and Personal area networks
標(biāo)簽：
Multi-Standard
Receivers
Wireless
CMOS
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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Recent decades have shown a tremendous expansion of the Internet. The number of
connected terminals has increased by orders of magnitude, traffic has grown exponen-
tially, coverage has become ubiquitous and worldwide, and today’s sophisticated Web
2.0 applications are increasingly providing services which hitherto have been the realm
of telecommunications, such as Skype and video conferencing. This has even led to the
thought that access to the Internet might one day be a universal right of every citizen.
This evolution will accelerate in the coming decades.
標(biāo)簽：
Networking
Personal
Networks
Wireless
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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Short-range communications is one of the most relevant as well as diversified fields of en-
deavour in wireless communications. As such, it has been a subject of intense research and
development worldwide, particularly in the last decade. There is no reason to believe that this
trend will decline. On the contrary, the rapidly crystallizing vision of a hyper-connected world
will certainly strengthen the role of short-range communications in the future. Concepts such
as wireless social networks, Internet of things, car communications, home and office network-
ing, wireless grids and Personal communications heavily rely on short-range communications
technology.
標(biāo)簽：
Communications
Short-Range
Wireless
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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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(shí)間：
2020-06-01
上傳用戶：shancjb
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Telecommunications is today widely understood to mean the electrical means of
communicating over a distance. The first form of telecommunications was that of
the Telegraph, which was invented quite independently in 1837 by two scientists,
Wheatstone and Morse. Telegraphy was on a point-to-point unidirectional basis and
relied on trained operators to interpret between the spoken or written word and the
special signals sent over the telegraph wire. However, the use of telegraphy did
greatly enhance the operations of railways and, of course, the dissemination of news
and Personal messages between towns.
標(biāo)簽：
Telecommunications
Understanding
Networks
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Today wireless is becoming the leader in communication choices among
users. It is not anymore a backup solution for nomadic travellers but really a
newmoodnaturallyusedeverywhereevenwhenthewiredcommunicationsare
possible. Many technologies evolve then continuously, changing the telecom-
munication world. We talk about wireless local area networks (WLANs), wire-
less Personal area networks (WPANs), wireless metropolitan area networks
(WMANs), wireless wide area networks (WWANs), mobile ad hoc networks
(MANETs), wireless sensor networks (WSNs) and mesh networks. Since we
can find today a multitude of wireless technologies we decided to group a
numberofcomplementarytechnologiesintoonedocumenttomakeiteasierfor
areadertounderstandsomeofthetechnicaldetailsofeachmedia.
標(biāo)簽：
TM
Bluetooth
Zigbee
Wi-Fi
WiMax
and
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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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(shí)間：
2020-06-01
上傳用戶：shancjb
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The advent of modern wireless devices, such as smart phones and MID 1 terminals,
has revolutionized the way people think of Personal connectivity. Such devices
encompass multiple applications ranging from voice and video to high-speed data
transfer via wireless networks. The voracious appetite of twenty-first century users
for supporting more wireless applications on a single device is ever increasing.
These devices employ multiple radios and modems that cover multiple frequency
bands and multiple standards with a manifold of wireless applications often running
simultaneously.
標(biāo)簽：
Architectures
Wireless
Receiver
Design
and
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Wirelesscommunications,especiallyinitsmobileform,hasbroughtusthefreedomofmobility
andhaschangedthelifestylesofmodernpeople.Waitingatafixedlocationtoreceiveormakea
phone call, or sitting in front of a Personal computer to send an e-mail or download a video
program, has become an old story. Nowadays it is commonplace for people to talk over a cell
phonewhilewalkingonthestreet,ortodownloadandwatchamoviewhiletravelingonatrain.
Thisisthebenefitmadeavailabletousbythesuccessfulevolutionofwirelesscommunications
over three generations, with the fourth generation being under way.
標(biāo)簽：
Communications
Management
Wireless
Resource
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Over the past few decades there has been an exponential growth in service robots
and smart home technologies, which has led to the development of exciting new
products in our daily lives. Service robots can be used to provide domestic aid for
the elderly and disabled, serving various functions ranging from cleaning to enter-
tainment. Service robots are divided by functions, such as Personal robots, field
robots, security robots, healthcare robots, medical robots, rehabilitation robots and
entertainment robots. A smart home appears “intelligent” because its embedded
computers can monitor so many aspects of the daily lives of householders. For
example, the refrigerator may be able to monitor its contents, suggest healthy alter-
natives and order groceries. Also, the smart home system may be able to clean the
house and water the plants.
標(biāo)簽：
Robotics
Service
Digital
within
Home
the
上傳時(shí)間：
2020-06-06
上傳用戶：shancjb
