-
Software defined radio (SDR) is an exciting new field for the wireless indus-
try; it is gaining momentum and beginning to be included in COMMERCIAL
and defense products. The technology offers the potential to revolutionize
the way radios are designed, manufactured, deployed, and used. SDR prom-
ises to increase flexibility, extend hardware lifetime, lower costs, and reduce
time to market
標簽：
Software
Defined
Radio
for
3G
上傳時間：
2020-06-01
上傳用戶：shancjb
-
Radio frequency spectrum is a scarce and critical natural resource that is utilized for
many services including surveillance, navigation, communication, and broadcast-
ing. Recent years have seen tremendous growth in the use of spectrum especially by
COMMERCIAL cellular operators. Ubiquitous use of smartphones and tablets is one
of the reasons behind an all-time high utilization of spectrum. As a result, cellular
operators are experiencing a shortage of radio spectrum to meet bandwidth
demands of users. On the other hand, spectrum measurements have shown that
much spectrum not held by cellular operators is underutilized even in dense urban
areas. This has motivated shared access to spectrum by secondary systems with no
or minimal impact on incumbent systems. Spectrum sharing is a promising
approach to solve the problem of spectrum congestion as it allows cellular operators
access to more spectrum in order to satisfy the ever-growing bandwidth demands of
COMMERCIAL users.
標簽：
Spectrum
Sharing
Between
Radars
上傳時間：
2020-06-01
上傳用戶：shancjb
-
The goal of this book is to provide a concise but lucid explanation and deriva-
tion of the fundamentals of spread-spectrum communication systems. Although
spread-spectrum communication is a staple topic in textbooks on digital com-
munication, its treatment is usually cursory, and the subject warrants a more
intensive exposition. Originally adopted in military networks as a means of
ensuring secure communication when confronted with the threats of jamming
and interception, spread-spectrum systems are now the core of COMMERCIAL ap-
plications such as mobile cellular and satellite communication.
標簽：
Spread-Spectrum
Communication
Systems
1st
上傳時間：
2020-06-01
上傳用戶：shancjb
-
Spread-spectrum communication is a core area within the field of digital
communication. Originally used in military networks as countermeasures against
the threats of jamming and interception, spread-spectrum systems are now widely
used in COMMERCIAL applications and are part of several wireless and mobile
communication standards. Although spread-spectrum communication is a staple
topic in textbooks on digital communication, its treatment is usually cursory. This
book is designed to provide a more intensive examination of the subject that is
suitable for graduate students and practicing engineers with a solid background
in the theory of digital communication. As the title indicates, this book stresses
principles rather than specific current or planned systems, which are described in
manyotherbooks.My goal in this bookis to providea concisebut lucidexplanation
of the fundamentals of spread-spectrum systems with an emphasis on theoretical
principles.
標簽：
Spread-Spectrum
Communication
Systems
2nd
上傳時間：
2020-06-01
上傳用戶：shancjb
-
Regulation is a pervasive feature of the telecommunications services industry
today. Government-appointed regulators and judicial or quasi-judicial bodies
oversee it in countries at all stages of economic development. Its primary
purpose is to encourage, nourish and maintain competition in national and
international telecommunications services markets. It is, therefore, a
fundamental feature of the legal and COMMERCIAL landscape within which network
owners and service providers operate. The modern development of regulation may
be traced to the liberalisation of the industry from national monopolies from
the 1980s onwards.
標簽：
Telecommunications Regulation
上傳時間：
2020-06-01
上傳用戶：shancjb
-
When 3GPP started standardizing the IMS a few years ago, most analysts expected the
number of IMS deploymentsto grow dramatically as soon the initial IMS specifications were
ready (3GPP Release 5 was functionallyfrozenin the first half of 2002and completedshortly
after that). While those predictions have proven to be too aggressive owing to a number of
upheavals hitting the ICT (Information and Communications Technologies) sector, we are
now seeing more and more COMMERCIAL IMS-based service offerings in the market. At the
time of writing (May 2008), there are over 30 COMMERCIAL IMS networks running live traffic,
addingup to over10million IMS users aroundthe world; the IMS is beingdeployedglobally.
In addition, there are plenty of ongoing market activities; it is estimated that over 130 IMS
contracts have been awarded to all IMS manufacturers. The number of IMS users will grow
substantially as these awarded contracts are launched COMMERCIALly. At the same time, the
number of IMS users in presently deployed networks is steadily increasing as new services
are introduced and operators running these networks migrate their non-IMS users to their
IMS networks.
標簽：
Multimedia
Subsystem
The
IMS
3G
IP
上傳時間：
2020-06-01
上傳用戶：shancjb
-
T
his book covers basic communications theory and practical imple-
mentation of transmitters and receivers. In so doing, I focus on dig-
ital modulation, demodulation methods, probabilities, detection of
digital signals, and spread spectrum system design and analysis. This book
was written for those who want a good understanding of the basic prin-
ciples of digital wireless communication systems, including spread spec-
trum techniques. This book also provides a good intuitive and practical
approach to digital communications. Therefore it is a valuable resource for
anyoneinvolvedinwirelesscommunicationsandtransceiverdesignfordig-
ital communications. The reader will gain a broad understanding of basic
communication principles for transceiver design, digital communications,
and spread spectrum, along with examples of many types of COMMERCIAL
and military data link systems.
標簽：
Transceiver
System
Design
上傳時間：
2020-06-01
上傳用戶：shancjb
-
Notwithstanding its infancy, wireless mesh networking (WMN) is a hot and
growing field. Wireless mesh networks began in the military, but have since
become of great interest for COMMERCIAL use in the last decade, both in local
area networks and metropolitan area networks. The attractiveness of mesh
networks comes from their ability to interconnect either mobile or fixed
devices with radio interfaces, to share information dynamically, or simply to
extend range through multi-hopping.
標簽：
Multi-hop
Networks
WiMAX
WiFi
Mesh
LTE
and
上傳時間：
2020-06-01
上傳用戶：shancjb
-
In a world where consumers,businesses and organizations are demanding faster,amerter and more seamlessly converged information technology and communization services,concepts such as Driverless Cars,combining advanced automatic controls,artficial intelligences and automotive transport technologies are soon expected to become a COMMERCIAL realty.At the same time,new blueprints such as industrial internet and industry 4.0 are driving the increased digitization of entire industries and economic sectors,boosting efficiencies and productivity.
標簽：
ZTE-M-ICT
上傳時間：
2020-06-01
上傳用戶：shancjb
-
Recent advancements in nanotechnology (NT) materials and growth of micro/
nanotechnology have opened the door for potential applications of microelectro-
mechanical systems (MEMS)- and NT-based sensors and devices. Such sensors and
devices are best suited for communications, medical diagnosis, COMMERCIAL, military,
aerospace, and satellite applications. This book comes at a time when the future and
well-being of Western industrial nations in the twenty-first century’s global eco-
nomy increasingly depend on the quality and depth of the technological innovations
they can COMMERCIALize at a rapid pace.
標簽：
MEMS
上傳時間：
2020-06-06
上傳用戶：shancjb
