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The next-generation wireless broadband technology is changing the way
we work, live, learn, and communicate through effective use of state-
of-the-art mobile broadband technology. The packet-data-based revolu-
tion started around 2000 with the introduction of 1x Evolved Data Only
(1xEV-DO) and 1x Evolved Data Voice (1xEV-DV) in 3GPP2 and High
Speed Downlink Packet Access (HSDPA) in 3GPP. The wireless broad-
band fourth-generation technology (4G) is an evolution of the packet-
based 3G system and provides a comprehensive evolution of the
Universal Mobile Telecommunications System specifications so as to
remain competitive with other broadband systems such as 802.16e
(WiMAX)
標簽：
Essentials
LTE-A
LTE
and
of
上傳時間：
2020-05-27
上傳用戶：shancjb
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Emerging technologies such as WiFi and WiMAX are profoundly changing the
landscape of wireless broadband. As we evolve into future generation wireless
networks, a primary challenge is the support of high data rate, integrated multi-
media type traffic over a unified platform. Due to its inherent advantages in
high-speed communication, orthogonal frequency division multiplexing (OFDM)
has become the modem of choice for a number of high profile wireless systems
(e.g., DVB-T, WiFi, WiMAX, Ultra-wideband).
標簽：
OFDM-Based
Broadband
Networks
Wireless
上傳時間：
2020-05-31
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The serious study of the practice of how to determine the appropriate content of a
specification is a seldom-appreciated pastime. Those who have the responsibility to
design a product would prefer a greater degree of freedom than permitted by the con-
tent of a specification. Many of those who would manage those who would design
a product would prefer to allocate all of the project funding and schedule to what
they consider more productive labor. These are the attitudes, of course, that doom a
project to defeat but they are hard to counter no matter how many times repeated by
design engineers and managers. A system engineer who has survived a few of these
experiences over a long career may retire and forget the past but we have an endur-
ing obligation to work toward changing these attitudes while trying to offer younger
system engineers a pathway toward a more sure success in requirements analysis and
specification publishing.
標簽：
Requirements
Analysis
System
上傳時間：
2020-06-01
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The first edition of this book was published in 1992. Nine years later it had become
clear that a second edition was required because of the rapidly changing nature of
telecommunication. In 1992, the Internet was in existence but it was not the
household word that it is in the year 2001. Cellular telephones were also in use
but they had not yet achieved the popularity that they enjoy today. In the current
edition, Chapter 1 has been revised to include a section on the Internet. Chapter 10 is
new and it covers the facsimile machine; I had overlooked this important tele-
communication device in the first edition. Chapter 11 is also new and it describes the
pager, the cordless telephone and the cellular telephone system. These are examples
of a growing trend in telecommunications to go ‘‘wireless’’.
標簽：
Telecommunication
Circuit
Design
2nd
上傳時間：
2020-06-01
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In this updated and expanded edition of her excellent telecommunications primer,
Lili explains in just the right detail everything you need to know to become
fluent in this most important and fascinating industry. Besides including a
satisfying amount of expert technical detail, the book also discusses equally
crucial aspects of how communications technology affects society, culture, and
politics. Electronic communications is changing the world for the better; learn
from Lili's expertise how you, too, can participate in the revolution." Steve Riley, senior security strategist, Microsoft
Corporation
標簽：
Telecommunications
Essentials
Global
Source
上傳時間：
2020-06-01
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Changes in telecommunications are impacting all types of user
group, which include business users, traveling users, small and
home offices, and residential users. The acceptance rate of telecom-
munications and information services is accelerating significantly.
Voice services needed approximately 50 years to reach a very high
teledensity; television needed just 15 years to change the culture
and lives of many families; the Internet and its related services have
been penetrating and changing business practices and private com-
munications over the last 2 to 3 years.
標簽：
Telecommunications
Handbook
The
上傳時間：
2020-06-01
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The continuing explosive growth in mobile communication is demanding more spectrally
efficient radio access technologies than the prevalent second generation (2G) systems such as
GSM to handle just the voice traffic. We are already witnessing high levels of mobile
penetration exceeding 70% in some countries. It is anticipated that by 2010 more than half of
all communications will be carried out by mobile cellular networks. On the other hand, the
information revolution and changing life habits are bringing the requirement of commu-
nicating on a multimedia level to the mobile environment. But the data handling capabilities
and flexibility of the 2G cellular systems are limited.
標簽：
Planning
Network
UMTS
上傳時間：
2020-06-01
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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.
標簽：
TM
Bluetooth
Zigbee
Wi-Fi
WiMax
and
上傳時間：
2020-06-01
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This text, ESD Basics: From Semiconductor Manufacturing to Product Use was initiated on
the need to produce a text that addresses fundamentals of electrostatic discharge from the
manufacturing environment to today’s products. As the manufacturing world evolves, semi-
conductor networks scale, and systems are changing, the needs and requirements for reliabi-
lity and ESD protection are changing. A text is required that connects basic ESD phenomena
to today’s real world environment.
標簽：
Basics
ESD
上傳時間：
2020-06-05
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We’re living through exciting times. The landscape of what computers can do is
changing by the week. Tasks that only a few years ago were thought to require
higher cognition are getting solved by machines at near-superhuman levels of per-
formance. Tasks such as describing a photographic image with a sentence in idiom-
atic English, playing complex strategy game, and diagnosing a tumor from a
radiological scan are all approachable now by a computer. Even more impressively,
computers acquire the ability to solve such tasks through examples, rather than
human-encoded of handcrafted rules.
標簽：
Deep-Learning-with-PyTorch
上傳時間：
2020-06-10
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